Intersil ISL28117 User manual

1
40V Precision Low Power Operational Amplifiers
ISL28117, ISL28217, ISL28417
The ISL28117, ISL28217 and ISL28417 are a family of very high
precision amplifiers featuring low noise vs power consumption,
low offset voltage, low IBIAS current and low temperature drift
making them the ideal choice for applications requiring both high
DC accuracy and AC performance. The combination of precision,
low noise, and small footprint provides the user with outstanding
value and flexibility relative to similar competitive parts.
Applications for these amplifiers include precision active
filters, medical and analytical instrumentation, precision
power supply controls, and industrial controls.
The ISL28117 single and ISL28217 dual are offered in an
8 Ld SOIC, MSOP and TDFN packages. The ISL28417 is offered
in 14 Ld SOIC, 14 Ld TSSOP packages. All devices are offered
in standard pin configurations and operate over the extended
temperature range from -40°C to +125°C.
Related Literature
•SeeAN1508 “ISL281X7SOICEVAL1Z Evaluation Board
User’s Guide”
•SeeAN1509 “ISL282X7SOICEVAL2Z Evaluation Board
User’s Guide”
Features
• Low input offset . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50µV, Max.
• Superb offset TC. . . . . . . . . . . . . . . . . . . . . . . . 0.6µV/°C, Max.
• Input bias current. . . . . . . . . . . . . . . . . . . . . . . . . . . ±1nA, Max.
• Input bias current TC . . . . . . . . . . . . . . . . . . . . .±5pA/°C, Max.
• Low current consumption . . . . . . . . . . . . . . . . . . . . . . . . 440µA
• Voltage noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8nV/Hz
• Wide supply range . . . . . . . . . . . . . . . . . . . . . . . . . .4.5V to 40V
• Operating temperature range. . . . . . . . . . . .-40°C to +125°C
•Smallpackageofferingsin single, dual and quad
• Pb-Free (RoHS compliant)
• No phase reversal
Applications
• Precision instruments
• Medical instrumentation
• Spectral analysis equipment
• Active filter blocks
• Thermocouples and RTD reference buffers
• Data acquisition
• Power supply control
FIGURE 1. TYPICAL APPLICATION FIGURE 2. VOS TEMPERATURE COEFFICIENT (VOSTC)
-
+
OUTPUT
V+
R1
V-
R2
C1
C2
SALLEN-KEY LOW PASS FILTER (10kHz)
VIN
1.84k 4.93k
3.3nF
8.2nF
VS= ± 15V
0
2
4
6
8
10
12
14
16
18
-0.45 -0.30 -0.15 0 0.15 0.30 0.45
VOSTC (µV/°C)
NUMBER OF AMPLIFIERS
November 30, 2012
FN6632.10
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas Inc. 2009-2012. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.

ISL28117, ISL28217, ISL28417
2November 30, 2012
FN6632.10
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
PART
MARKING
VOS (MAX)
(µV)
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL28117FBBZ 28117 FBZ 50 (B Grade) 8 Ld SOIC M8.15E
ISL28117FBZ 28117 FBZ -C 100 (C Grade) 8 Ld SOIC M8.15E
ISL28117FUBZ 8117Z 70 (B Grade) 8 Ld MSOP M8.118B
ISL28117FUZ 8117Z -C 150 (C Grade) 8 Ld MSOP M8.118B
ISL28117FRTBZ 8117 75 (B Grade) 8 Ld TDFN L8.3x3K
ISL28117FRTZ -C 8117 150 (C Grade) 8 Ld TDFN L8.3x3K
ISL28217FBBZ 28217 FBZ 50 (B Grade) 8 Ld SOIC M8.15E
ISL28217FBZ 28217 FBZ -C 100 (C Grade) 8 Ld SOIC M8.15E
Coming Soon
ISL28217FUBZ 8217Z TBD (B Grade) 8 Ld MSOP M8.118B
ISL28217FUZ 8217Z -C 150 (C Grade) 8 Ld MSOP M8.118B
ISL28217FRTBZ 8217 70 (B Grade) 8 Ld TDFN L8.3x3K
ISL28217FRTZ -C 8217 150 (C Grade) 8 Ld TDFN L8.3x3K
ISL28417FBBZ 28417 FBZ 120 (B Grade) 14 Ld SOIC MDP0027
ISL28417FBZ 28417 FBZ -C 200 (C Grade) 14 Ld SOIC MDP0027
ISL28417FVBZ 28417 FVZ 120 (B Grade) 14 Ld TSSOP M14.173
ISL28417FVZ 28417 FVZ-C 200 (C Grade) 14 Ld TSSOP M14.173
ISL28117SOICEVAL1Z Evaluation Board
ISL28217SOICEVAL2Z Evaluation Board
NOTES:
1. Add “-T*” suffix for tape and reel. Please refer to TB347 for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte
tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil
Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), please see device information page for ISL28117, ISL28217, ISL28417. For more information on MSL please see
techbrief TB363.

ISL28117, ISL28217, ISL28417
3November 30, 2012
FN6632.10
Pin Configurations
ISL28117
(8 LD SOIC, MSOP)
TOP VIEW
ISL28117
(8 LD TDFN)
TOP VIEW
ISL28217
(8 LD SOIC, MSOP)
TOP VIEW
ISL28217
(8 LD TDFN)
TOP VIEW
ISL28417
(14 LD SOIC, TSSOP)
TOP VIEW
NC
-IN
+IN
V -
1
2
3
4
8
7
6
5
NC
V+
VOUT
NC
+
-
2
3
4
1
7
6
5
8
NC
-IN
+IN
V-
NC
V+
VOUT
NC
+-
VOUT_A
-IN_A
+IN_A
V -
1
2
3
4
8
7
6
5
V+
VOUT_B
-IN_B
+IN_B
+-
+-
2
3
4
1
7
6
5
8
VOUT_A
-IN_A
+IN_A
V-
V+
VOUT_B
-IN_B
+IN_B
+-
+-
-+ -+
-+ -+
BC
AD
VOUT_A
-IN_A
+IN_A
V +
1
2
3
4
5
6
7
10
9
8
11
12
13
14
+IN_B
-IN_B
VOUT_B
V -
+IN_C
-IN_C
VOUT_C
VOUT_D
-IN_D
+IN_D

ISL28117, ISL28217, ISL28417
4November 30, 2012
FN6632.10
Pin Descriptions
ISL28117
(8 LD SOIC,
MSOP, TDFN)
ISL28217
(8 LD SOIC,
MSOP, TDFN)
ISL28417
(14 LD SOIC, TSSOP) PIN NAME EQUIVALENT CIRCUIT DESCRIPTION
3 - - +IN Circuit 1 Amplifier non-inverting input
-33+IN_A
-55+IN_B
- - 10 +IN_C
- - 12 +IN_D
4 4 11 V- Circuit 3 Negative power supply
2 - - -IN Circuit 1 Amplifier inverting input
-22-IN_A
-66-IN_B
--9-IN_C
--13-IN_D
7 8 4 V+ Circuit 3 Positive power supply
6- -V
OUT Circuit 2 Amplifier output
-11V
OUT_A
-77V
OUT_B
--8V
OUT_C
--14V
OUT_D
1, 5, 8 - - NC - No internal connection
PD PD - PD - Thermal Pad - TDFN package only.
Connect thermal pad to ground or most
negative potential.
CIRCUIT 2 CIRCUIT 1
V+
V-
CIRCUIT 3
CAPACITIVELY
COUPLED
ESD CLAMP
IN-
V+
V-
IN+
500Ω500ΩV+
V-
OUT

ISL28117, ISL28217, ISL28417
5November 30, 2012
FN6632.10
Table of Contents
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Thermal Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Recommended Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical Specifications VS± 15V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical Specifications VS± 5V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Typical Performance Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Applications Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Operating Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Input Performance 19
Input ESD Diode Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Output Current Limiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Output Phase Reversal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Unused Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
ISL28117, ISL28217 and ISL28417 SPICE Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
License Statement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Characterization vs Simulation Results. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Package Outline Drawing (M8.15E). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Package Outline Drawing (M8.118B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Package Outline Drawing (L8.3x3K) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
MDP0027 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Package Outline Drawing (M14.173). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

ISL28117, ISL28217, ISL28417
6November 30, 2012
FN6632.10
Absolute Maximum Ratings Thermal Information
Maximum Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....42V
Maximum Differential Input Current . . . . . . . . . . . . . . . . . . . . . . . . . . 20mA
Maximum Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42V
Min/Max Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . V- - 0.5V to V+ + 0.5V
Max/Min Input current for Input Voltage >V+ or <V-. . . . . . . . . . . . . . . . ±20mA
Output Short-Circuit Duration (1 output at a time). . . . . . . . . . . . . . . . Indefinite
ESD Rating
Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.5kV
Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500V
Machine Model (ISL28217 MSOP only). . . . . . . . . . . . . . . . . . . . . . . 300V
Charged Device Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.5kV
ESD Rating (ISL28417 SOIC)
Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6kV
Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 450V
Charged Device Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2kV
Thermal Resistance (Typical) θJA (°C/W) θJC (°C/W)
8 Ld SOIC ISL28117 (Notes 4, 7) . . . . . . . . 120 60
8 Ld SOIC ISL28217 (Notes 4, 7) . . . . . . . . 105 50
8 Ld MSOP ISL28117 (Notes 4, 7) . . . . . . . 155 50
8 Ld MSOP ISL28217 (Notes 4, 7) . . . . . . . 160 55
8 Ld TDFN ISL28117 (Notes 5, 6). . . . . . . . 48 7
8 Ld TDFN ISL28217 (Notes 5, 6). . . . . . . . 43 2
14 Ld SOIC (Notes 5, 7) . . . . . . . . . . . . . . . . 73 45
14 Ld TSSOP (Notes 4, 7) . . . . . . . . . . . . . . 90 32
Maximum Storage Temperature Range . . . . . . . . . . . .-65°C to +150°C
Maximum Junction Temperature (TJMAX) . . . . . . . . . . . . . . . . . . .+150°C
Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
Recommended Operating Conditions
Ambient Temperature Range (TA) . . . . . . . . . . . . . . . . . . .-40°C to +125°C
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product
reliability and result in failures not covered by warranty.
NOTES:
4. θJA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
5. θJA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See Tech
Brief TB379.
6. For θJC, the “case temp” location is the center of the exposed metal pad on the package underside.
7. For θJC, the “case temp” location is taken at the package top center.
Electrical Specifications VS± 15V, VCM = 0, VO= 0V, TA= +25°C, unless otherwise noted. Boldface limits apply over the operating
temperature range, -40°C to +125°C.
PARAMETER DESCRIPTION CONDITIONS
MIN
(Note 8) TYP
MAX
(Note 8) UNIT
VOS Input Offset Voltage, SOIC, TSSOP
Package
ISL28x17 B Grade -50 8 50 µV
-110 110 µV
ISL28x17 C Grade -100 4 100 µV
-190 190 µV
ISL28417 B Grade -70 10 70 µV
-120 120 µV
ISL28417 C Grade -110 10 110 µV
TA= -40°C to +85°C -160 160 µV
TA= -40°C to +125°C -200 200 µV
Input Offset Voltage, MSOP Package ISL28117 B Grade -70 -10 70 µV
-150 150 µV
ISL28117 C Grade -150 4 150 µV
-250 250 µV
ISL28217 C Grade -150 10 150 µV
-250 250 µV
Input Offset Voltage, TDFN Package ISL28117 B Grade -75 -10 75 µV
-160 160 µV
ISL28217 B Grade -70 10 70 µV
-140 140 µV
ISL28x17 C Grade -150 10 150 µV
-250 250 µV

ISL28117, ISL28217, ISL28417
7November 30, 2012
FN6632.10
TCVOS Input Offset Voltage Temperature
Coefficient; SOIC, TSSOP Package
ISL28x17 B Grade -0.6 0.14 0.6 µV/°C
ISL28x17 C Grade -0.9 0.14 0.9 µV/°C
ISL28417 B Grade -0.75 0.2 0.75 µV/°C
ISL28417 C Grade -0.9 0.3 0.9 µV/°C
Input Offset Voltage Temperature
Coefficient; MSOP Package
ISL28117 B Grade -0.8 0.1 0.8 µV/°C
ISL28117 C Grade -1 0.14 1 µV/°C
ISL28217 C Grade -1 0.14 1 µV/°C
Input Offset Voltage Temperature
Coefficient; TDFN Package
ISL28117 B Grade -0.9 0.1 0.9 µV/°C
ISL28217 B Grade -0.7 0.1 0.7 µV/°C
ISL28x17 C Grade -1 0.1 1 µV/°C
IBInput Bias Current -1 0.08 1 nA
-1.5 1.5 nA
TCIBInput Bias Current Temperature
Coefficient
-5 1 5 pA/°C
IOS Input Offset Current -1.5 0.08 1.5 nA
-1.85 1.85 nA
TCIOS Input Offset Current Temperature
Coefficient
-3 0.42 3 pA/°C
ISL28417 SOIC, TSSOP B and C Grade -4.0 0.45 4.0 pA/°C
VCM Input Voltage Range Guaranteed by CMRR test -13 13 V
CMRR Common-Mode Rejection Ratio VCM = -13V to +13V 120 145 dB
120 dB
PSRR Power Supply Rejection Ratio VS= ±2.25V to ±20V 120 145 dB
120 dB
AVOL Open-Loop Gain VO = -13V to +13V, RL=10kΩto ground 130 143 dB
VOH Output Voltage High RL= 10kΩto ground 13.5 13.7 V
13.2 V
RL= 2kΩto ground 13.3 13.55 V
13.1 V
VOL Output Voltage Low RL= 10kΩto ground -13.7 -13.5 V
-13.2 V
RL= 2kΩto ground -13.55 -13.3 V
-13.1 V
ISSupply Current/Amplifier 0.44 0.53 mA
0.68 mA
ISC Short-Circuit 43 mA
VSUPPLY Supply Voltage Range Guaranteed by PSRR ± 2.25 ± 20 V
AC SPECIFICATIONS
GBWP Gain Bandwidth Product AV= 1k, RL= 2kΩ1.5 MHz
enVp-p Voltage Noise VP-P 0.1Hz to 10Hz 0.25 µVP-P
enVoltage Noise Density f = 10Hz 10 nV/√Hz
enVoltage Noise Density f = 100Hz 8.2 nV/√Hz
enVoltage Noise Density f = 1kHz 8 nV/√Hz
enVoltage Noise Density f = 10kHz 8 nV/√Hz
Electrical Specifications VS± 15V, VCM = 0, VO= 0V, TA= +25°C, unless otherwise noted. Boldface limits apply over the operating
temperature range, -40°C to +125°C. (Continued)
PARAMETER DESCRIPTION CONDITIONS
MIN
(Note 8) TYP
MAX
(Note 8) UNIT

ISL28117, ISL28217, ISL28417
8November 30, 2012
FN6632.10
in Current Noise Density f = 1kHz 0.1 pA/√Hz
THD + N Total Harmonic Distortion 1kHz, G = 1, VO= 3.5VRMS, RL= 2kΩ0.0009 %
1kHz, G = 1, VO= 3.5VRMS, RL= 10kΩ0.0005 %
TRANSIENT RESPONSE
SR Slew Rate, VOUT 20% to 80% AV= 11, RL = 2kΩ, VO = 4VP-P 0.5 V/µs
tr, tf,
Small Signal
Rise Time
10% to 90% of VOUT
AV = 1, VOUT = 50mVP-P,
R
L
= 10k Ω to VCM
130 ns
Fall Time
90% to 10% of VOUT
AV = 1, VOUT = 50mVP-P, R
L
= 10k Ω to VCM 130 ns
tsSettling Time to 0.1%
10V Step; 10% to VOUT
AV = -1, VOUT = 10VP-P, R
L
= 5k Ω to VCM 21 µs
Settling Time to 0.01%
10V Step; 10% to VOUT
AV = -1, VOUT = 10VP-P, R
L
= 5k Ω to VCM 24 µs
Settling Time to 0.1%
4V Step; 10% to VOUT
AV = -1, VOUT = 4VP-P , R
L
= 5k Ω to VCM 13 µs
Settling Time to 0.01%
4V Step; 10% to VOUT
AV = -1, VOUT = 4VP-P , R
L
= 5k Ω to VCM 18 µs
tOL Output Positive Overload Recovery Time AV
= -100, V
IN
= 0.2 VP-P, R
L
= 2k Ω to VCM 5.6 µs
Output Negative Overload Recovery Time AV
= -100, V
IN
= 0.2 VP-P, R
L
= 2k Ω to VCM 10.6 µs
Electrical Specifications VS± 5V, VCM = 0, VO= 0V, TA= +25°C, unless otherwise noted. Boldface limits apply over the operating
temperature range, -40°C to +125°C.
PARAMETER DESCRIPTION CONDITIONS
MIN
(Note 8) TYP
MAX
(Note 8) UNIT
VOS Input Offset Voltage, SOIC, TSSOP
Package
ISL28x17 B Grade -50 8 50 µV
-110 110 µV
ISL28x17 C Grade -100 4 100 µV
-190 190 µV
ISL28417 B Grade -70 10 70 µV
-120 120 µV
ISL28417 C Grade -110 10 110 µV
TA= -40°C to +85°C -160 160 µV
TA= -40°C to +125°C -200 200 µV
Input Offset Voltage, MSOP Package ISL28117 B Grade -70 -10 70 µV
-150 150 µV
ISL28117 C Grade -150 4 150 µV
-250 250 µV
ISL28217 C Grade -150 10 150 µV
-250 250 µV
Input Offset Voltage, TDFN Package ISL28117 B Grade -75 -10 75 µV
-160 160 µV
ISL28217 B Grade -70 10 70 µV
-140 140 µV
ISL28x17 C Grade -150 10 150 µV
-250 250 µV
Electrical Specifications VS± 15V, VCM = 0, VO= 0V, TA= +25°C, unless otherwise noted. Boldface limits apply over the operating
temperature range, -40°C to +125°C. (Continued)
PARAMETER DESCRIPTION CONDITIONS
MIN
(Note 8) TYP
MAX
(Note 8) UNIT

ISL28117, ISL28217, ISL28417
9November 30, 2012
FN6632.10
TCVOS Input Offset Voltage Temperature
Coefficient; SOIC, TSSOP Package
ISL28x17 B Grade -0.6 0.14 0.6 µV/°C
ISL28x17 C Grade -0.9 0.14 0.9 µV/°C
ISL28417 B Grade -0.75 0.2 0.75 µV/°C
ISL28417 C Grade -0.9 0.3 0.9 µV/°C
Input Offset Voltage Temperature
Coefficient; MSOP Package
ISL28117 B Grade -0.8 0.1 0.8 µV/°C
ISL28117 C Grade -1 0.14 1 µV/°C
ISL28217 C Grade -1 0.14 1 µV/°C
Input Offset Voltage Temperature
Coefficient; TDFN Package
ISL28117 B Grade -0.9 0.1 0.9 µV/°C
ISL28217 B Grade -0.7 0.1 0.7 µV/°C
ISL28x17 C Grade -1 0.1 1 µV/°C
IBInput Bias Current -1 0.18 1 nA
-1.5 1.5 nA
TCIBInput Bias Current Temperature
Coefficient
-5 1 5 pA/°C
IOS Input Offset Current -1.5 0.3 1.5 nA
-1.85 1.85 nA
TCIOS Input Offset Current Temperature
Coefficient
-3 0.42 3 pA/°C
ISL28417 SOIC, TSSOP B and C Grade -4.0 0.45 4.0 pA/°C
VCM Input Voltage Range -3 3 V
CMRR Common-Mode Rejection Ratio VCM = -3V to +3V 120 145 dB
120 dB
PSRR Power Supply Rejection Ratio VS= ±2.25V to ±5V 120 145 dB
120 dB
AVOL Open-Loop Gain VO = -3.0V to +3.0V, RL= 10kΩto ground 130 143 dB
VOH Output Voltage High RL= 10kΩto ground 3.5 3.7 V
3.2 V
RL= 2kΩto ground 3.3 3.55 V
3.1 V
VOL Output Voltage Low RL= 10kΩto ground -3.7 -3.5 V
-3.2 V
RL= 2kΩto ground -3.55 -3.3 V
-3.1 V
IS Supply Current/Amplifier 0.44 0.53 mA
0.68 mA
ISC Short-Circuit 43 mA
AC SPECIFICATIONS
GBWP Gain Bandwidth Product AV= 1k, RL= 2kΩ1.5 MHz
enp-p Voltage Noise 0.1Hz to 10Hz 0.25 µVP-P
enVoltage Noise Density f = 10Hz 12 nV/√Hz
enVoltage Noise Density f = 100Hz 8.6 nV/√Hz
enVoltage Noise Density f = 1kHz 8 nV/√Hz
Electrical Specifications VS± 5V, VCM = 0, VO= 0V, TA= +25°C, unless otherwise noted. Boldface limits apply over the operating
temperature range, -40°C to +125°C. (Continued)
PARAMETER DESCRIPTION CONDITIONS
MIN
(Note 8) TYP
MAX
(Note 8) UNIT

ISL28117, ISL28217, ISL28417
10 November 30, 2012
FN6632.10
enVoltage Noise Density f = 10kHz 8 nV/√Hz
in Current Noise Density f = 1kHz 0.1 pA/√Hz
TRANSIENT RESPONSE
SR Slew Rate, VOUT 20% to 80% AV=11, RL = 2kΩ, VO=4V
P-P 0.5 V/µs
tr, tf, Small Signal Rise Time
10% to 90% of VOUT
AV = 1, VOUT = 50mVP-P,
R
L
= 10k Ω to VCM
130 ns
Fall Time
90% to 10% of VOUT
AV = 1, VOUT = 50mVP-P,
R
L
= 10k Ω to VCM
130 ns
tsSettling Time to 0.1%
4V Step; 10% to VOUT
AV = -1, VOUT = 4VP-P,
R
L
= 5k Ω to VCM
12 µs
Settling Time to 0.01%
4V Step; 10% to VOUT
AV = -1, VOUT = 4VP-P,
R
L
= 5k Ω to VCM
19 µs
tOL Output Positive Overload Recovery Time AV
= -100, V
IN
= 0.2V
P-P
R
L
= 2k Ω to VCM
7µs
Output Negative Overload Recovery Time AV
= -100, V
IN
= 0.2V
P-P
R
L
= 2k Ω to VCM
5.8 µs
NOTE:
8. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design.
Electrical Specifications VS± 5V, VCM = 0, VO= 0V, TA= +25°C, unless otherwise noted. Boldface limits apply over the operating
temperature range, -40°C to +125°C. (Continued)
PARAMETER DESCRIPTION CONDITIONS
MIN
(Note 8) TYP
MAX
(Note 8) UNIT
Typical Performance Curves VS = ±15V, VCM = 0V, RL= Open, unless otherwise specified.
FIGURE 3. VOS DISTRIBUTION FOR GRADE B FIGURE 4. VOS DISTRIBUTION FOR GRADE B
VS= ±5V
0
20
40
60
80
100
120
140
-50 -30 -10 10 30 50
VOS (µV)
NUMBER OF AMPLIFIERS
ISL28217FBBZ
VS= ±15V
0
20
40
60
80
100
120
140
-50 -30 -10 10 30 50
VOS (µV)
NUMBER OF AMPLIFIERS
ISL28217FBBZ

ISL28117, ISL28217, ISL28417
11 November 30, 2012
FN6632.10
FIGURE 5. VOS DISTRIBUTION FOR GRADE C FIGURE 6. VOS DISTRIBUTION FOR GRADE C
FIGURE 7. VOS RANGE vs TEMPERATURE FIGURE 8. TCVOS vs NUMBER OF AMPLIFIERS
FIGURE 9. VOS RANGE vs TEMPERATURE FIGURE 10. TCVOS vs NUMBER OF AMPLIFIERS
Typical Performance Curves VS = ±15V, VCM = 0V, RL= Open, unless otherwise specified. (Continued)
VS= ± 15V
0
50
100
150
200
250
300
-100 -60 -20 20 60 100
VOS (µV)
NUMBER OF AMPLIFIERS
ISL28217FBZ
VS= ± 5V
0
50
100
150
200
250
300
-100 -60 -20 20 60 100
VOS (µV)
NUMBER OF AMPLIFIERS
ISL28217FBZ
VOS (µV)
TEMPERATURE (°C)
VS= ± 15V
-100
-50
0
50
100
-50 0 50 100 150
VS= ± 15V
0
2
4
6
8
10
12
14
16
18
-0.45 -0.30 -0.15 0 0.15 0.30 0.45
VOSTC (µV/°C)
NUMBER OF AMPLIFIERS
VOS (µV)
TEMPERATURE (°C)
VS= ± 5V
-100
-50
0
50
100
-50 0 50 100 150
VS= ±5V
0
2
4
6
8
10
12
14
16
-0.45 -0.30 -0.15 0 0.15 0.30 0.45
VOSTC (µV/°C)
NUMBER OF AMPLIFIERS

ISL28117, ISL28217, ISL28417
12 November 30, 2012
FN6632.10
FIGURE 11. IB+ RANGE vs TEMPERATURE FIGURE 12. TCIB+ vs NUMBER OF AMPLIFIERS
FIGURE 13. IB- RANGE vs TEMPERATURE FIGURE 14. TCIB- vs NUMBER OF AMPLIFIERS
FIGURE 15. IB+ RANGE vs TEMPERATURE FIGURE 16. TCIB+ vs NUMBER OF AMPLIFIERS
Typical Performance Curves VS = ±15V, VCM = 0V, RL= Open, unless otherwise specified. (Continued)
VS= ± 15V
-500
-400
-300
-200
-100
0
100
200
300
400
500
-50 0 50 100 150
TEMPERATURE (°C)
IB+ (pA)
VS = ±15V
0
10
20
30
40
50
60
70
-3.5 -2.5 -1.5 -0.5 0.5 1.5 2.5 3.5 MORE
IB+TC (pA/°C)
NUMBER OF AMPLIFIERS
VS= ± 15V
-500
-400
-300
-200
-100
0
100
200
300
400
500
-50 0 50 100 150
TEMPERATURE (°C)
IB- (pA)
VS = ±15V
0
10
20
30
40
50
60
70
-3.5 -2.5 -1.5 -0.5 0.5 1.5 2.5 3.5
IB-TC (pA/°C)
NUMBER OF AMPLIFIERS
VS= ± 5V
-500
-400
-300
-200
-100
0
100
200
300
400
500
-50 0 50 100 150
TEMPERATURE (°C)
IB+ (pA)
VS= ±5V
0
10
20
30
40
50
60
70
80
-3.5 -2.5 -1.5 -0.5 0.5 1.5 2.5 3.5
IB+TC(pA/°C)
NUMBER OF AMPLIFIERS

ISL28117, ISL28217, ISL28417
13 November 30, 2012
FN6632.10
FIGURE 17. IB- RANGE vs TEMPERATURE FIGURE 18. TCIB- vs NUMBER OF AMPLIFIERS
FIGURE 19. IOS RANGE vs TEMPERATURE FIGURE 20. IOSTC vs NUMBER OF AMPLIFIERS
FIGURE 21. IOS RANGE vs TEMPERATURE FIGURE 22. IOSTC vs NUMBER OF AMPLIFIERS
Typical Performance Curves VS = ±15V, VCM = 0V, RL= Open, unless otherwise specified. (Continued)
VS= ± 5V
-500
-400
-300
-200
-100
0
100
200
300
400
500
-50 0 50 100 150
TEMPERATURE (°C)
IB- (pA)
VS= ±5V
0
10
20
30
40
50
60
70
80
90
-3.5 -2.5 -1.5 -0.5 0.5 1.5 2.5 3.5
IB-TC(pA/°C)
NUMBER OF AMPLIFIERS
VS= ± 15V
-500
-400
-300
-200
-100
0
100
200
300
400
500
-50 0 50 100 150
TEMPERATURE (°C)
IOS (pA)
VS = ±15V
0
10
20
30
40
50
60
70
80
90
-3.5 -2.5 -1.5 -0.5 0.5 1.5 2.5 3.5
TCIOS (pA/°C)
NUMBER OF AMPLIFIERS
VS= ± 5V
-500
-400
-300
-200
-100
0
100
200
300
400
500
-50 0 50 100 150
TEMPERATURE (°C)
IOS (pA)
VS = ±5V
0
10
20
30
40
50
60
70
80
90
100
-3.5 -2.5 -1.5 -0.5 0.5 1.5 2.5 3.5
TCIOS (pA/°C)
NUMBER OF AMPLIFIERS

ISL28117, ISL28217, ISL28417
14 November 30, 2012
FN6632.10
FIGURE 23. SUPPLY CURRENT PER AMP vs TEMPERATURE FIGURE 24. AVOL vs TEMPERATURE
FIGURE 25. PSRR vs TEMPERATURE FIGURE 26. CMRR vs TEMPERATURE
FIGURE 27. POSITIVE SHORT CIRCUIT CURRENT vs TEMPERATURE FIGURE 28. NEGATIVE SHORT CIRCUIT CURRENT vs TEMPERATURE
Typical Performance Curves VS = ±15V, VCM = 0V, RL= Open, unless otherwise specified. (Continued)
±15V
0.3
0.4
0.5
0.6
0.7
-50 0 50 100 150
TEMPERATURE (°C)
Isupply (mA)
±2.25V
10000
15000
20000
-50 0 50 100 150
TEMPERATURE (°C)
AVOL (V/mV)
VO= ±13V
-155
-150
-145
-140
-50 0 50 100 150
TEMPERATURE (°C)
PSRR (dB)
VS= ±2.25V TO ±20V
-160
-155
-150
-145
-140
-135
-130
-50 0 50 100 150
TEMPERATURE (°C)
CMRR (dB)
VCM = ±13V
25
30
35
40
45
50
55
60
-50 0 50 100 150
TEMPERATURE (°C)
ISC+ (mA)
ISC+ @ ±15V
25
30
35
40
45
50
55
60
-50 0 50 100 150
TEMPERATURE (°C)
ISC- (mA)
ISC- @ ±15V

ISL28117, ISL28217, ISL28417
15 November 30, 2012
FN6632.10
FIGURE 29. INPUT VOS vs INPUT COMMON MODE VOLTAGE,
VS = ±15
FIGURE 30. INPUT VOS vs INPUT COMMON MODE VOLTAGE,
VS = ±5V
FIGURE 31. VOH vs TEMPERATURE FIGURE 32. VOL vs TEMPERATURE,
FIGURE 33. VOH vs TEMPERATURE FIGURE 34. VOL vs TEMPERATURE
Typical Performance Curves VS = ±15V, VCM = 0V, RL= Open, unless otherwise specified. (Continued)
-60
-40
-20
0
20
40
60
80
100
-15 -10 -5 0 5 10 15
VCM (V)
VOS (µV)
VS= ±15V
+125°C
+25°C
-40°C
-60
-40
-20
0
20
40
60
80
100
-5 -3 -1 1 3 5
VCM (V)
VOS (µV)
VS= ±5V
+125°C
+25°C
-40°C
13.2
13.4
13.6
13.8
14.0
14.2
14.4
-50 0 50 100 150
TEMPERATURE (°C)
VOH (V)
VS= ±15V
RL= 10kΩ
-14.4
-14.2
-14.0
-13.8
-13.6
-13.4
-13.2
-50 0 50 100 150
TEMPERATURE (°C)
VOL (V)
VS= ±15V
RL = 10kΩ
13.2
13.4
13.6
13.8
14.0
14.2
14.4
-50 0 50 100 150
TEMPERATURE (°C)
VOH (V)
VS= ±15V
RL= 2kΩ
-14.4
-14.2
-14.0
-13.8
-13.6
-13.4
-13.2
-50 0 50 100 150
TEMPERATURE (°C)
VOL (V)
VS= ±15V
RL= 2kΩ

ISL28117, ISL28217, ISL28417
16 November 30, 2012
FN6632.10
FIGURE 35. INPUT NOISE VOLTAGE 0.1Hz to 10Hz FIGURE 36. INPUT NOISE VOLTAGE SPECTRAL DENSITY
FIGURE 37. INPUT NOISE CURRENT SPECTRAL DENSITY FIGURE 38. OPEN-LOOP GAIN, PHASE vs FREQUENCY, RL=10kΩ,
CL= 10pF
FIGURE 39. OPEN-LOOP GAIN, PHASE vs FREQUENCY, RL= 10kΩ,
CL= 100pF
FIGURE 40. CMRR vs FREQUENCY, VS= ±2.25, ±5V, ±15V
Typical Performance Curves VS = ±15V, VCM = 0V, RL= Open, unless otherwise specified. (Continued)
TIME (s)
INPUT NOISE VOLTAGE (nV)
012345678910
-250
-200
-150
-100
-50
0
50
100
150
200
250
V+ = 36.4V
Rg= 10, Rf= 100k
AV = 10,000
FREQUENCY (Hz)
1
10
100
1 10 100 1k 10k 100k
INPUT NOISE VOLTAGE (nV/√Hz)
VS= ±18.2V
AV = 1
FREQUENCY (Hz)
1 10 100 1k 10k 100k
1
INPUT NOISE CURRENT (pA/√Hz)
0.1
VS= ±18.2V
AV = 1
OPEN LOOP GAIN (dB)/PHASE (°)
FREQUENCY (Hz)
-100
-80
-60
-40
-20
0
20
40
60
80
100
120
140
160
180
200
0.1m 1m 10m 100m 1 10 100 1k 10k 100k 1M 10M 100M
RL= 10k
SIMULATION
CL= 10pF
GAIN
PHASE
OPEN LOOP GAIN (dB)/PHASE (°)
FREQUENCY (Hz)
-100
-80
-60
-40
-20
0
20
40
60
80
100
120
140
160
180
200
0.1m 1m 10m 100m 1 10 100 1k 10k 100k 1M 10M 100M
RL= 10k
SIMULATION
CL= 100pF
GAIN
PHASE
CMRR (dB)
FREQUENCY (Hz)
0
20
40
60
80
100
120
140
160
180
200
220
1m 10m 100m 1 10 100 1k 10k 100k 1M 10M 100M
RL= INF
SIMULATION
CL= 10pF
VS= ±2.5V
VS= ±5V
VS= ±15V

ISL28117, ISL28217, ISL28417
17 November 30, 2012
FN6632.10
FIGURE 41. PSRR vs FREQUENCY, VS= ±5V, ±15V FIGURE 42. FREQUENCY RESPONSE vs CLOSED LOOP GAIN
FIGURE 43. FREQUENCY RESPONSE vs FEEDBACK RESISTANCE
Rf/Rg
FIGURE 44. GAIN vs FREQUENCY vs RL
FIGURE 45. GAIN vs FREQUENCY vs CLFIGURE 46. GAIN vs FREQUENCY vs SUPPLY VOLTAGE
Typical Performance Curves VS = ±15V, VCM = 0V, RL= Open, unless otherwise specified. (Continued)
0
PSRR (dB)
100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
10
20
40
60
80
100
120
-10
10
30
50
70
90
110
RL= INF
AV = +1
VCM = 1VP-P
CL= 4pF
PSRR+ AND PSRR- VS = ±15V
PSRR+ AND PSRR- VS= ±2.25V
FREQUENCY (Hz)
GAIN (dB)
100k 1M 10M
10 10k
1k
-10
0
10
20
30
40
50
60
70
100
AV = 1
AV = 100
AV = 1000
VS= ±20V
VOUT = 50mVP-P
CL= 4pF
RL= 10k
Rg= 10k, Rf= 100k
AV = 10
Rg= 1k, Rf= 100k
Rg= OPEN, Rf= 0
Rg= 100, Rf= 100k
NORMALIZED GAIN (dB)
-10
-8
-6
-4
-2
0
2
4
-16
-14
-12
FREQUENCY (Hz)
100k 1M 10M
10 10k
1k
100
Rf= Rg= 100k
Rf= Rg= 100
Rf= Rg= 10k
Rf= Rg= 1k
VS= ±20V
RL= 10k
AV = +2
VOUT = 50mVP-P
CL= 4pF
FREQUENCY (Hz)
100k 1M 10M
10 10k
1k
100
GAIN (dB)
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
VS= ±20V
AV = +1
VOUT = 50mVP-P
CL= 4pF
RL= 499
RL= 100
RL= 4.99k
RL= 10k
RL= 1k
FREQUENCY (Hz)
100k 1M 10M
10 10k
1k
100
GAIN (dB)
-8
-6
-4
-2
0
2
4
6
8
10
12
VS= ±2.5V
RL= 10k
AV = +1
VOUT = 50mVP-P
CL= 0.01µF
CL= 270pF
CL= 47pF
CL= 1000pF
CL= 470pF
CL= 4pF
CL= 100pF
FREQUENCY (Hz)
100k 1M 10M
10 10k
1k
100
GAIN (dB)
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
CL= 4pF
RL= 10k
AV = +1
VOUT = 50mVP-P
VS= ±5V
VS= ±20V
VS= ±2.25V
VS= ±15V

ISL28117, ISL28217, ISL28417
18 November 30, 2012
FN6632.10
FIGURE 47. CROSSTALK, VS= ±15V FIGURE 48. LARGE SIGNAL TRANSIENT RESPONSE vs RLVS = ±5V,
±15V
FIGURE 49. SMALL SIGNAL TRANSIENT RESPONSE, VS= ±5V, ±15V FIGURE 50. POSITIVE OUTPUT OVERLOAD RESPONSE TIME,
VS= ±5V, ±15V
FIGURE 51. NEGATIVE OUTPUT OVERLOAD RESPONSE TIME,
VS = ±5V, ±15V
FIGURE 52. % OVERSHOOT vs LOAD CAPACITANCE, VS= ±15V
Typical Performance Curves VS = ±15V, VCM = 0V, RL= Open, unless otherwise specified. (Continued)
0
20
40
60
80
100
120
140
160
180
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
CROSSTALK (dB)
VS= ±15V
RL-DRIVER CH. = OPEN
AV = +1
VSOURCE = 1VP-P
CL= 4pF
RL-RECEIVING CH. = 10k
TIME (µs)
LARGE SIGNAL (V)
-2.4
-2.0
-1.6
-1.2
-0.8
-0.4
0
0.4
0.8
1.2
1.6
2.0
2.4
0 102030405060708090100
AV = +1
CL = 4pF
VOUT = 4VP-P
VS= ±5V, RL = 2k, 10k
VS= ±15V, RL = 2k, 10k
TIME (µs)
SMALL SIGNAL (mV)
-10
0
10
20
30
40
50
60
0 5 10 15 20 25 30 35 40
RL = 10k
AV = +1
CL = 4pF
VOUT = 50mVP-P
VS= ±15V
TIME (µs)
OUTPUT (V)
INPUT (V)
-0.28
-0.24
-0.20
-0.16
-0.12
-0.08
-0.04
0.04
0 102030405060708090100
-2
0
2
4
6
8
10
12
14
0
INPUT
OUTPUT @ VS = ±15V
RL= 2k
AV = -100
CL= 4pF
Rf= 100k, Rg= 1k
VIN = 200mVP-P
OUTPUT @ VS= ±5V
TIME (µs)
OUTPUT (V)
INPUT (V)
0 102030405060708090100
-0.08
-0.04
0
0.04
0.08
0.12
0.16
0.20
0.24
-12
-10
-8
-6
-4
-2
0
2
4
INPUT
OUTPUT @ VS= ±15V
RL= 2k
AV = -100
CL= 4pF
Rf= 100k, Rg= 1k
VIN = 200mVP-P
OUTPUT @ VS= ±5V
CAPACITANCE (pF)
0
10
20
30
40
50
60
70
80
OVERSHOOT (%)
OVERSHOOT+
VS= ±15V
RL= 10k
AV = 1
VOUT = 50mVP-P
OVERSHOOT-
1 10 100 1k 10k 100k

ISL28117, ISL28217, ISL28417
19 November 30, 2012
FN6632.10
Applications Information
Functional Description
The ISL28117, ISL28217 and ISL28417 are single, dual and
quad, low noise precision op amps. Both devices are fabricated
in a new precision 40V complementary bipolar DI process. A
super-beta NPN input stage with input bias current cancellation
provides low input bias current (180pA typical), low input offset
voltage (13µV typical), low input noise voltage (8nV/√Hz), and
low 1/f noise corner frequency (~8Hz). These amplifiers also
feature high open loop gain (18kV/mV) for excellent CMRR
(145dB) and THD+N performance (0.0005% @ 3.5VRMS, 1kHz
into 2kΩ). A complimentary bipolar output stage enables high
capacitive load drive without external compensation.
Operating Voltage Range
The devices are designed to operate over the 4.5V (±2.25V) to
40V (±20V) range and are fully characterized at 10V (±5V) and
30V (±15V). The Power Supply Rejection Ratio typically exceeds
140dB over the full operating voltage range and 120dB
minimum over the -40°C to +125°C temperature range. The
worst case common mode input voltage range over temperature
is 2V to each rail. With ±15V supplies, CMRR performance is
typically >130dB over-temperature. The minimum CMRR
performance over the -40°C to +125°C temperature range is
>120dB for power supply voltages from ±5V (10V) to ±15V (30V).
Input Performance
The super-beta NPN input pair provides excellent frequency
response while maintaining high input precision. High NPN beta
(>1000) reduces input bias current while maintaining good
frequency response, low input bias current and low noise. Input
bias cancellation circuits provide additional bias current
reduction to <1nA, and excellent temperature stabilization.
Figures 11 through 18 show the high degree of bias current
stability at ±5V and ±15V supplies that is maintained across the
-40°C to +125°C temperature range. The low bias current TC
also produces very low input offset current TC, which reduces DC
input offset errors in precision, high impedance amplifiers.
The +25°C maximum input offset voltage (VOS) for the “B” grade is
50µV and 100µV for the “C” grade. Input offset voltage temperature
coefficients (VOSTC) are a maximum of ±0.6µV/°C for the “B” and
±0.9µV/°C for the “C” grade. Figures 3 through 6 show the typical
gaussian-like distribution over the ±5V to ±15V supply range and over
the full temperature range. The VOS temperature behavior is smooth
(Figures 7 through 10) maintaining constant TC across the entire
temperature range.
Input ESD Diode Protection
The input terminals (IN+ and IN-) have internal ESD protection
diodes to the positive and negative supply rails, series connected
500Ωcurrent limiting resistors and an anti-parallel diode pair
across the inputs (Figure 54).
The series resistors limit the high feed-through currents that can
occur in pulse applications when the input dV/dT exceeds the
0.5V/µs slew rate of the amplifier. Without the series resistors, the
input can forward-bias the anti-parallel diodes causing current to
flow to the output resulting in severe distortion and possible diode
failure. Figure 48 provides an example of distortion free large signal
response using a 4VP-P input pulse with an input rise time of <1ns.
The series resistors enable the input differential voltage to be equal
to the maximum power supply voltage (40V) without damage.
FIGURE 53. COMMON MODE INPUT IMPEDANCE
Typical Performance Curves VS = ±15V, VCM = 0V, RL= Open, unless otherwise specified. (Continued)
1
10
100
1k
10k
100k
1M
10M
100M
1 10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
0.1
INPUT RESISTANCE (kΩ)
0.01
FIGURE 54. INPUT ESD DIODE CURRENT LIMITING- UNITY GAIN
-
+RL
VIN
VOUT
V+
V-
500Ω
500Ω

ISL28117, ISL28217, ISL28417
20 November 30, 2012
FN6632.10
In applications where one or both amplifier input terminals are at
risk of exposure to high voltages beyond the power supply rails,
current limiting resistors may be needed at the input terminal to
limit the current through the power supply ESD diodes to
20mA max.
Output Current Limiting
The output current is internally limited to approximately ±45mA
at +25°C and can withstand a short circuit to either rail as long
as the power dissipation limits are not exceeded. This applies to
only 1 amplifier at a time for the dual op amp. Continuous
operation under these conditions may degrade long term
reliability. Figures 27 and 28 show the current limit variation with
temperature.
Output Phase Reversal
Output phase reversal is a change of polarity in the amplifier
transfer function when the input voltage exceeds the supply
voltage. The ISL28117, ISL28217 and ISL28417 are immune to
output phase reversal, even when the input voltage is 1V beyond
the supplies.
Unused Channels
The ISL28217 is a dual op-amp. If the application only requires
one channel, the user must configure the unused channel to
prevent it from oscillating. The unused channel oscillates if the
input and output pins are floating. This results in higher than
expected supply currents and possible noise injection into the
channel being used. The proper way to prevent this oscillation is
to short the output to the inverting input and ground the positive
input, as shown in Figure 55.
Power Dissipation
It is possible to exceed the +150°C maximum junction
temperatures under certain load and power supply conditions. It
is therefore important to calculate the maximum junction
temperature (TJMAX) for all applications to determine if power
supply voltages, load conditions, or package type need to be
modified to remain in the safe operating area. These parameters
are related using Equation 1:
where:
•P
DMAXTOTAL is the sum of the maximum power dissipation of
each amplifier in the package (PDMAX)
•PD
MAX for each amplifier can be calculated using Equation 2:
where:
•T
MAX = Maximum ambient temperature
•θJA = Thermal resistance of the package
•PD
MAX = Maximum power dissipation of 1 amplifier
•V
S= Total supply voltage
•I
qMAX = Maximum quiescent supply current of 1 amplifier
•V
OUTMAX = Maximum output voltage swing of the application
ISL28117, ISL28217 and ISL28417 SPICE
Model
Figure 56 shows the SPICE model schematic and Figure 57
shows the net list for the ISL28117, ISL28217 and ISL28417
SPICE model for a Grade “B” part. The model is a simplified
version of the actual device and simulates important AC and DC
parameters. AC parameters incorporated into the model are: 1/f
and flatband noise, Slew Rate, CMRR, Gain and Phase. The DC
parameters are VOS, IOS, total supply current and output voltage
swing. The model uses typical parameters given in the “Electrical
Specifications” Table beginning on page 6. The AVOL is adjusted
for 155dB with the dominate pole at 0.02Hz. The CMRR is set
(210dB, fcm = 10Hz). The input stage models the actual device to
present an accurate AC representation. The model is configured
for ambient temperature of +25°C.
Figures 58 through 68 show the characterization vs simulation
results for the Noise Voltage, Closed Loop Gain vs Frequency,
Closed Loop Gain vs RL, Large Signal Step Response, Open Loop
Gain Phase and Simulated CMRR vs Frequency.
FIGURE 55. PREVENTING OSCILLATIONS IN UNUSED CHANNELS
-
+
TJMAX TMAX θJAxPDMAXTOTAL += (EQ. 1)
PDMAX VSIqMAX VS (- VOUTMAX)VOUTMAX
RL
------------------------
×+×=(EQ. 2)