Renesas ISL28005 User manual

Evaluation Board Manual
AN1531 Rev.1.00 Page 1
Feb 9, 2022 © 2010 Renesas Electronics
The ISL28005 evaluation board is a design platform
containing all the circuitry needed to characterize
critical performance parameters of the ISL28005 in
either a high side or low-side current sense
application. The ISL28005 is available in fixed
100V/V, 50V/V, and 20V/V gains.
Features
▪One installed sense resistor: 100mΩ, 1W, 1%
▪Connectors for direct connections to external
system supply and load resistor
▪Options for four more on-board sense resistors
▪Options for additional input and output filter
resistors and capacitors
Specifications
▪Low Power Consumption: 50μA,Typ
▪Supply Range on VS+: 2.7V to 28V
▪Wide Common Mode Input: 0V to 28V
▪Operating Temperature Range: -40°C to +125°C
Figure 1. Block Diagram
Optiona l
Input Filter
Optiona l
Output Filter
R
S
VS+
GND
I-SENSE+
I-SENSE-
GND
I-SENSE
OUT
ISL28005
RS+
RS- GND
OUT
VCC
4
5
2
1
3
ISL28005xEVAL1Z

AN1531 Rev.1.00 Page 2
Feb 9, 2022
ISL28005xEVAL1Z Evaluation Board Manual
Contents
1. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Optional Transient Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Board Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Board Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3. Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4. Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

AN1531 Rev.1.00 Page 3
Feb 9, 2022
ISL28005xEVAL1Z Evaluation Board Manual
1. Functional Description
1.1 Optional Transient Protection
For applications where the load and the power source are permanently connected, transient protection is not
required and only an external current sense resistor (R3) is needed.
For applications where fast transients can generate voltage spikes that can overdrive the amplifier input and drive
the output of the amplifier into the rails, resulting in a long overload recovery time. Common mode capacitors C7,
C9 and differential capacitor C8are used to filter the common mode and differential voltage spikes.
For switching applications or where fast transients are caused by hot plugging the source or load, external
protection components may be needed. The external current limiting resistor (R6) in Figure 4 limits the peak
current through the internal ESD diodes to <20mA. This condition can occur in applications that experience high
levels of in-rush current causing high peak voltages that can damage the internal ESD diodes of the ISL28005. If
the current limiting resistor is required, it needs to be placed on the RS- input (R6). Placing it on the RS+ input side
(R7) will result in a much larger error voltage due to the ISL28005 taking its supply current from the sense current
in high-side applications.
For example:
Current limiting resistor R6with a value of 100Ωprovides protection for a 2V transient with the maximum of 20mA
flowing through the input while adding only an additional 13µV (worst case over-temperature) of VOS as shown in
Equation 1. Note: Worst case over-temperature input bias current on the RS- input is 130nA.
Current limiting resistor R7with value of 100Ωprovides the same transient protection, but with an error voltage of
800µV. Note: Worst case over-temperature input bias current on the RS+ input is 8µA as shown in Equation 2.
R7is a carry-over from our characterization board and was used to measure input bias current. The evaluation
board is populated with a 0Ωresistor for R7.
1.2 Power Supplies
External power connections are made through the VS+ and Ground connections on the evaluation board.
Capacitors C2and C4perform two duties, de-coupling the supplies and with R15, filtering of the power supply
noise. Anti-reverse diodes D1and D3protect the circuit in the case of accidental polarity reversal of the supply.
Resistor R12 is used to connect ground to the fixed gain parts.
(EQ. 1)
(EQ. 2)
R6IRS- 100130nA13V==
R7IRS+ 1008A800V==

AN1531 Rev.1.00 Page 4
Feb 9, 2022
ISL28005xEVAL1Z Evaluation Board Manual
2. Board Design
Figure 2. ISL28005FH-100EVAL1Z Evaluation Board (Top)
Figure 3. ISL28005FH-100EVAL1Z Evaluation Board (Bottom)

AN1531 Rev.1.00 Page 5
Feb 9, 2022
ISL28005xEVAL1Z Evaluation Board Manual
2.1 Schematic Diagram
The ISL2800XEVAL1Z evaluation board is configured with either the ISL28005-100, ISL28005-50, or
ISL28005-20 device.
Figure 1 shows the basic application circuit and optional protection components for the fixed gain parts. Figure 4
shows the complete schematic for the ISL2800XEVAL1Z evaluation board.
Components shown in red in Figure 4 are optional transient protection and not required for clean environments.
Note: The evaluation board comes equipped with the transient protection devices.
Figure 4. ISL28005xEVAL1Z Schematic Diagram
I-SENSE-
ARE FOR KELVIN CONNECTIONS
R16-R20 AND R21-R25
I-SENSE+
GND VS+
V-REF
I-SENSE
OUT
1000pF
J4 1
R16 DNP DNP R17 R18
0
DNP R19 R20 DNP
DNP
R5
DNP
R4
DNP R25 DNP R24
0.10
DNP
R1
R2
R23
0
DNP R22
12 D3
S1AB
J5
1
R13
DNP
R14
R11
DNP
DNP
C2
0
R12
DNP
0
OPEN
100
S1AB
0.01µF
1µF
SOT23_5
0
OPEN
J3
R9
R8
J2 1
J6
1
2
3
4
U1
1
2
3
5
C4
C10
R15
C20
J1 1
D1
21
R10
R26
4
DNP
5
C9
1000pF
R7
0
R6
100
C8
0.01µF
C7
DNP R21
DNP
R3
ISL28005
D2
J13
DNP
Optional Transient Protection

AN1531 Rev.1.00 Page 6
Feb 9, 2022
ISL28005xEVAL1Z Evaluation Board Manual
2.2 Bill of Materials
2.3 Board Layout
Reference Designator Description Comments
C2 CAP, SMD, 0805, 1µF, 50V, 20%, X7R, ROHS Power Supply Decoupling and Input Filter
C4, C8 CAP, SMD, 0603, 0.01µF, 50V, 10%, X7R, ROHS Power Supply Decoupling/Input Filter and
Differential Current Sense Filter
C7, C9 CAP, SMD, 0603, 1000pF, 50V, 10%, X7R, ROHS Common Mode Current Sense Filter
C10, C20 CAP, SMD, 0603, DNP - Place Holder, ROHS User Selectable Capacitors - Not Populated
D1, D3 Diode-Rectifier, SMD, S1AB, 50V, ROHS Reverse Power Protection
U1 ISL28005FH100Z-T7, SOT-23, ROHS For ISL28005-100EVAL1Z board only
ISL28005FH50Z-T7, SOT-23, ROHS For ISL28005-50EVAL1Z board only
ISL28005FH20Z-T7, SOT-23, ROHS For ISL28005-20EVAL1Z board only
R16, R17, R19 -R22,
R24, R25
Resistor, SMD, 0603, MF, DNP - Place Holder User Selectable Kelvin Connection - Not
Populated
R26 Resistor, SMD, 0603, MF, DNP - Place Holder User Selectable Output Load Resistor -
Not Populated
R3 Resistor, SMD, 2512, 0.1Ω, 1W, 1%, TF, ROHS Sense Resistor
R1, R2, R4, R5 Resistor, SMD, 2512, DNP - Place Holder User Selectable Sense Resistors - Not
Populated
R6, R7, R13, R18, R23 Resistor, SMD, 0603, 0Ω, 1/10W, TF, ROHS Zero Ohm User Selectable Resistors
R15 Resistor, SMD, 0603, 100Ω, 1/10W, TF, ROHS Current Limiting Resistors
Figure 5. Top Layer

AN1531 Rev.1.00 Page 7
Feb 9, 2022
ISL28005xEVAL1Z Evaluation Board Manual
3. Ordering Information
4. Revision History
Figure 6. Bottom Layer
Part Number Description
ISL28005-100EVAL1Z ISL28005 100V/V fixed gain evaluation board
ISL28005-50EVAL1Z ISL28005 50V/V fixed gain evaluation board
ISL28005-20EVAL1Z ISL28005 20V/V fixed gain evaluation board
Revision Date Description
1.00 Feb 9, 2022 Applied new template.
Updated Figure 1.
Added Figures 2, 3, and 6.
Added Ordering Information Tale.
0.00 Feb 18, 2010 Initial release

Corporate Headquarters
TOYOSU FORESIA, 3-2-24 Toyosu,
Koto-ku, Tokyo 135-0061, Japan
www.renesas.com
Contact Information
For further information on a product, technology, the most
up-to-date version of a document, or your nearest sales
office, please visit:
www.renesas.com/contact/
Trademarks
Renesas and the Renesas logo are trademarks of Renesas
Electronics Corporation. All trademarks and registered
trademarks are the property of their respective owners.
IMPORTANT NOTICE AND DISCLAIMER
RENESAS ELECTRONICS CORPORATION AND ITS SUBSIDIARIES (“RENESAS”) PROVIDES TECHNICAL
SPECIFICATIONS AND RELIABILITY DATA (INCLUDING DATASHEETS), DESIGN RESOURCES (INCLUDING
REFERENCE DESIGNS), APPLICATION OR OTHER DESIGN ADVICE, WEB TOOLS, SAFETY INFORMATION, AND
OTHER RESOURCES “AS IS” AND WITH ALL FAULTS, AND DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED,
INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE, OR NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY RIGHTS.
These resources are intended for developers skilled in the art designing with Renesas products. You are solely responsible
for (1) selecting the appropriate products for your application, (2) designing, validating, and testing your application, and (3)
ensuring your application meets applicable standards, and any other safety, security, or other requirements. These
resources are subject to change without notice. Renesas grants you permission to use these resources only for
development of an application that uses Renesas products. Other reproduction or use of these resources is strictly
prohibited. No license is granted to any other Renesas intellectual property or to any third party intellectual property.
Renesas disclaims responsibility for, and you will fully indemnify Renesas and its representatives against, any claims,
damages, costs, losses, or liabilities arising out of your use of these resources. Renesas' products are provided only subject
to Renesas' Terms and Conditions of Sale or other applicable terms agreed to in writing. No use of any Renesas resources
expands or otherwise alters any applicable warranties or warranty disclaimers for these products.
(Rev.1.0 Mar 2020)