Linear Technology LTC2393-16 Quick setup guide

1
dc1501A
DEMO MANUAL DC1501A
DESCRIPTION
LTC2393-16/LTC2392-16/
LTC2391-16, 1MSPS, 0.5MSPS,
0.25MSPS Low Noise ADC
The LTC2393-16 family are low noise high speed ADCs
with both parallel and serial outputs that can operate from
a single 5V supply. The LTC2393-16 family supports a
large ±4.096V fully differential input range. This makes
them ideal for high performance applications that require
maximum dynamic range. Demonstration circuit 1501A
provides the user a means of evaluating the performance
of these ADCs in both parallel and serial modes and is L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
intended to demonstrate recommended grounding, part
placement, routing and bypassing for this family of parts.
Also several suggested driver circuits for the analog inputs
will be presented.
Design files for this circuit board are available at http://
www.linear.com/demo.
Figure 1. DC1501A Connection Diagram
–9V +9VGND
TO
DC718
CLK IN
1MHz MAX
(80MHz FOR SERIAL)
3.3VPK-PK MAXIMUM
AIN–
0V TO 4.096V
MAXIMUM
AIN+
0V TO 4.096V
MAXIMUM
DEMO BOARD IC MAX SAMPLE RATE PARALLEL MAX CLK IN SERIAL MAX CLK IN
DC1501A-A LTC2393CLX-16 1Msps 1MHz 80MHz
DC1501A-B LTC2392CLX-16 0.5Msps 0.5MHz 40MHz
DC1501A-C LTC2391CLX-16 0.25Msps 0.25MHz 20MHz

2
dc1501A
DEMO MANUAL DC1501A
DC718B/C QUICK START PROCEDURE
Check to make sure that all switches and jumpers are
set as shown in the connection diagram of Figure 1. The
default connections configure the ADC for parallel opera-
tion with the output data in offset binary format. The
analog input is AC-coupled and the internal reference of
the ADC is used.
Connect DC1501A to a DC718B/C USB High Speed Data
Collection Board using connector J1. Connect DC718B/C
to a host PC with a standard USB A/B cable. Apply ±9V to
the indicated terminals. Apply a low jitter signal source to
J17. The default setup uses a single-ended to differential
converter so that it is only necessary to apply an input
signal to J17. Connect a low jitter 1MHz 3.3VP-P sine wave
or square wave to connector J16 for LTC2393-16. Apply
500kHz for LTC2392-16 and 250kHz for LTC2391-16.
Note that J16 has a 50Ω termination resistor to ground.
Run the QuickEval-II software (Pscope.exe version K66
or later) supplied with DC718B/C or download it from
www.linear.com.
Complete software documentation is available from the
Help menu. Updates can be downloaded from the Tools
menu. Check for updates periodically as new features
may be added.
The Pscope software should recognize DC1501A and
configure itself automatically.
Click the Collect button (See Figure 6) to begin acquiring
data. The Collect button then changes to Pause, which
can be clicked to stop data acquisition.
DC1501A SETUP
DC Power
DC1501 requires ±9VDC at approximately 100mA. Most
of the supply current is consumed by the CPLD, op amps,
regulators and discreet logic on the board. The ±9VDC
input voltage powers the ADC through LT1763 regulators
which provide protection against accidental reverse bias.
Additional regulators provide power for the CPLD and
op amps. See Figure 1 for connection details.
Clock Source
You must provide a low jitter 3.3VP-P sine or square wave
to J16. The clock input is AC-coupled so the DC level of the
clock signal is not important. A generator like the HP8644
or similar is recommended.Even a good generatorcan start
to produce noticeable jitter at low frequencies. Therefore
it is recommended for lower sample rates to divide down
a higher frequency clock to the desired sample rate. One
way to accomplish this is by placing the ADC in the serial
mode. This can be accomplished by setting the SER/PARL
position of SW1 to the high position. In the serial mode
the ratio of clock frequency to conversion rate is 80:1.
This limits the max clock frequency of DC1501A-A to
80MHz in serial mode. DC1501A-B is limited to 40MHz and
DC1501A-C is limited to 20MHz. In the parallel mode there
is a 1:1 ratio of clock frequency to conversion rate. If the
clockinput isto bedriven withlogic, itis recommendedthat
the 50Ω terminator (R17) be removed. Slow rising edges
may compromise SNR of the converter in the presence of
high-amplitude higher frequency input signals.
Data Output
Parallel data output from this board (0V to 3.3V default),
if not connected to DC718, can be acquired by a logic
analyzer, and subsequently imported into a spread-sheet,
ormathematical packagedepending onwhat formof digital
signal processing is desired. Alternatively, the data can be
fed directly into an application circuit. Use pin 3 of J1 to
latch the data. The data can be latched using either edge
of this signal. The data output signal levels at J1 can also
be reduced to 0V to 2.5V if the application circuit cannot
tolerate the higher voltage. Thisis accomplished by moving
J13 to the 2.5V position.

3
dc1501A
DEMO MANUAL DC1501A
Figure 2. Single-Ended to Differential Converter
Reference
J7, J8 and J11 allow you to select an on chip reference
or an external LT1790A-4.096 as the reference. The initial
tolerance and drift specifications of the external reference
are better than the on chip reference. To use the internal
reference set J7 to FLT, J8 to ADC and J11 to REFIN. To use
the LT1790A-4.096 set J7 and J11 to GND and J8 to EXT.
Analog Input
The default driver for the analog inputs of the LTC2393
family on DC1501A is shown in Figure 2. This circuit
converts a single-ended 0V to 4.096V input signal applied
at AIN into a differential signal with a swing of ±4.096V
between the +IN and –IN inputs of the ADC. In addition this
circuit band limits the input frequencies to approximately
100kHz which is the useful bandwidth of these ADCs.
Alternatively, if your application circuit produces a differ-
ential signal which can drive the ADC but you need to
level shift the input signal, the circuits of Figure 3 and
Figure 4 can be used. The circuit of Figure 3 AC-couples
the input signal and is usable down to about 10kHz. The
lower frequency limit can be extended by increasing C37
and C51. The circuit of Figure 3 can be implemented on
DC1501A by putting J20 and J21 in the AC position and
moving R2 and R3 to the R50 and R53 positions. One of
these RC pairs can be attached to the input of the circuit in
Figure 2. This allows a single-ended input signal to be level
shifted. This is the default condition for DC1501A. Figure
4’s input driver allows the input voltage range to go below
ground. It DC-couples and level shifts the analog input at
the expense of attenuating the input level by a factor of 2.
The circuit of Figure 4 can be implemented on DC1501A
by setting VCM to External and biasing the external pin to
4.096V replacing R1 and R6 with 1kΩ, putting J20 and
J21 in the DC position and moving R2 and R3 to the R50
and R53 positions.
For SINAD, THD or SNR testing a low noise, low distortion
generatorsuch asthe B&KType 1051or StanfordResearch
DS360 should be used.
DC1501A SETUP

4
dc1501A
DEMO MANUAL DC1501A
Data Collection
This demoboard istestedin housebyduplicating theFFT plot
shown in theADC data sheet. Thisinvolves using alow jitter,
1MHz (500kHz for LTC2392-16, 250kHz for LTC2391-16)
clock source for the encode clock, along with a low noise,
low distortion sinusoidal generatorat a frequency of 20kHz.
The input signal level is approximately –1dBfs.
The input is filtered with a 20kHz single pole RC filter
shown in Figure 5. The FFT shown in the data sheet is a
16384-point FFT. A typical FFT obtained with DC1501A
is shown in Figure 6. Note that to get the real SNR, the
DC1501A SETUP
Figure 3. AC-Coupled Differential Driver
Figure 4. DC Coupled Differential Driver
signal level (–1dB) has to be added back to the SNR that
PScope displays. With the example shown in Figure 6 this
means that the actual SNR would be 94.061dB. Taking the
RMS sum of the recalculated SNR and the THD yields a
SINAD of 93.75dB which is fairly close to the typical value
for this ADC.
There are a number of scenarios that can produce
misleading results when evaluating an ADC. One that is
common is feeding the converter with a frequency, that
is a sub-multiple of the sample rate, and which will only
exercise a small subset of the possible output codes.

5
dc1501A
DEMO MANUAL DC1501A
If you do not have a signal generator capable of ppm levels
of frequency accuracy or if it cannot be slaved to the clock
frequency, you can use an FFT with windowing to reduce
the “leakage” or spreading of the fundamental, to get a
close approximation of the performance parameters. If an
amplifier or clock source with poor phase noise is used,
the windowing will not improve the SNR.
The signal source typically usedfor in housetesting is aB&K
1051. A lowjitter RFoscillator such asthe HP8644is used as
the clocksource. Aswith anyhighperformance ADC,this part
is sensitive to layout. The area immediately surrounding the
ADC onDC1501 shouldbeused asa guidelineforplacement,
and routing of the various components associated with the
ADC. Note should also be taken of the ground plane used
in the layout of this board.
DC1501A SETUP
Figure 5. 20kHz RC filter
Figure 6. DC1501A FastDAACS Screenshot

6
dc1501A
DEMO MANUAL DC1501A
DC1501A MISCELLANEOUS DIP SWITCHES AND JUMPERS
Definitions
J2- -INPUT sets the bias point for the –input of U2A. The
default is –AIN.
J6- VCM sets the DC bias for AIN+and AIN–when the inputs
are AC-coupled. INT is the default position.
SW1-
SER_PARL- Selects serial or parallel operation. Default
position is parallel. In parallel mode fs= fclk. In serial mode
fs = fclk/80.
OB/2CL- Selects offset binary or two’s complement
data format for ADC output word. The default is offset
binary.
CSL- This pin must be kept low for normal operation.
RDL- This pin must be kept low for normal operation.

7
dc1501A
DEMO MANUAL DC1501A
PARTS LIST
ITEM QUANTITY REFERENCE DESIGNATOR DESCRIPTION MANUFACTURERS PART NUMBER
REQUIRED CIRCUIT COMPONENTS:
1 0 C1, C9, C39, C52, C54, C55
(opt.)
CAP., 0603
2 1 C2 CAP., NP0, 2200pF, 25V, 5% 1206 AVX, 12063A222JAT2A
3 11 C4, C5, C7, C12, C16,
C23-C25, C33, C36, C41
CAP., X7R, 1μF, 16V, 10% 0603 AVX, 0603YC105KAT2A
4 9 C10, C18, C20, C22, C28,
C30, C37, C51, C53
CAP., X5R, 10μF, 6.3V, 20% 0603 Taiyo Yuden, JMK107BJ106MA (2rls, PbF)
5 2 C13, C14 CAP., X5R, 10μF, 10V, 20% 0805 Taiyo Yuden, LMK212BJ106MG
6 9 C11, C27, C29, C31, C32,
C34, C35, C38, C50
CAP., X7R, 0.1μF, 25V, 10% 0603 AVX, 06033C104KAT2A
7 4 C15, C17, C19, C21 CAP., X7R, 0.01μF, 50V, 10% 0603 AVX, 06035C103KAT2A
8 1 C26 CAP., X5R, 47μF, 16V, 20% 1210 Taiyo Yuden, EMK325BJ476MM
9 1 C40 CAP., X5R, 4.7μF, 4V, 20% 0402 Taiyo Yuden, AMK105BJ475MV-F
10 8 C42-C49 CAP., X5R, 0.1μF, 10V, 10% 0402 AVX, 0402ZD104KAT2A
11 9 E1-E9 Testpoint, Turret, .061” pbf MILL-MAX, 2308-2-00-80-00-00-07-0
12 1 J1 Header, .1 ×.1 CNTRS, 40-Pin Samtec, TSW-120-07-L-S
13 1 JTAG 0.1” × 5 Double Row Header Samtec, TSW-105-07-L-D
14 1 J2 0.1” × 3 Double Row Header Samtec, TSW-103-07-L-D
15 6 J6, J7, J8, J11, J20, J21 3-Pin 0.1” Single Row Header Samtec, TSW-103-07-L-S (PbF)
16 8 XJTAG, XJ2, XJ6-J8, XJ11,
XJ19-J21
Shunt, 0.1” Center Samtec, SNT-100-BK-G (PbF)
17 1 J13 3-Pin 2mm Single Row Header Samtec, TMM103-02-L-S
18 1 XJ13 Shunt, 2mm Center Samtec, 2SN-BK-G
19 3 J16, J17, J18 CONN, BNC, 5-Pins Connex, 112404
20 2 R1, R6 RES., Chip, 0, 1/10W, 0603 Vishay, CRCW06030000Z0EA
21 2 R2, R3 RES., Chip, 249, 1/10W, 1% 0603 Vishay, CRCW0603249RFKEA
22 3 R4, R5, R7 RES., Chip, 301, 1/10W, 1% 0603 Vishay, CRCW0603301RFKEA
23 3 R8, R9, R10 RES., Chip, 4.99k, 1/10W, 1% 0603 Vishay, CRCW06034K99FKEA
24 3 R11, R12, R28 RES., Chip, 1k, 1/10W, 5% 0603 Vishay, CRCW06031K00JNEA
25 2 R15, R13 RES., Chip, 3.92k, 1/10W, 1% 0603 Vishay, CRCW06033K92FKEA
26 6 R14, R16, R18, R19, R30,
R37
RES., Chip, 1.00k, 1/10W, 1% 0603 Vishay, CRCW06031K00FKEA
27 1 R17 RES., Chip, 49.9, 1/4W, 1% 1206 Vishay, CRCW120649R9FKEA
28 3 R20, R22, R49 RES., Chip, 33, 1/10W, 5% 0603 Vishay, CRCW060333R0JNEA
29 1 R24 RES., Chip, 1.0, 1/10W, 5% 0603 Vishay, CRCW06031R00JNEA
30 1 R25 RES., Chip, 1.69k, 1/10W, 1% 0603 Vishay, CRCW06031K69FKEA
31 1 R26 RES., Chip, 1.54k, 1/10W, 1% 0603 Vishay, CRCW06031K54FKEA
32 1 R27 RES., Chip, 2.80k, 1/10W, 1% 0603 Vishay, CRCW06032K80FKEA
33 0 R29, R36, R38, R50, R53,
R55(opt)
RES., Chip, 0603
34 4 R31, R32, R33, R34 RES., Chip, 1k, 1/16W, 5% 0402 Vishay, CRCW04021K00JNED
35 5 R35, R40, R41, R42, R43 RES., Chip, 10k, 1/16W, 5% 0402 Vishay, CRCW040210K0JNED
36 4 R45, R46, R47, R48 RES., Chip, 300, 1/16W, 5% 0402 Vishay, CRCW0402300RJNED

8
dc1501A
DEMO MANUAL DC1501A
ITEM QUANTITY REFERENCE DESIGNATOR DESCRIPTION MANUFACTURERS PART NUMBER
REQUIRED CIRCUIT COMPONENTS:
37 2 R51, R52 RES., Chip, 49.9, 1/16W, 1% 0402 Vishay, CRCW040249R9FKED
38 1 R54 RES., Chip, 10k, 1/10W, 5% 0603 Vishay, CRCW060310K0JNEA
39 1 SW1 Switch, 219-4MST, CTS Electronic Components, 219-4MST
40 1 U2 IC., LT1807CMS8 MSOP-8 Linear Tech., LT1807CMS8#TRPBF
41 1 U4 IC., 24LC025 TSSOP-8 Microchip., 24LC025-T/ST
42 1 U5 IC., LT1790ACS6-4.096, SOT23-6 Linear Tech., LT1790ACS6-4.096#PBF
43 1 U6 IC., LT1763CS8-1.8, SO8 Linear Tech., LT1763CS8-1.8#PBF
44 2 U9, U7 IC., LT1763CS8, SO8 Linear Tech., LT1763CS8#PBF
45 1 U8 IC., LT1763CS8-5, SO8 Linear Tech., LT1763CS8-5#PBF
46 1 U10 IC., LT1964ES5-SD, SOT23-5 Linear Tech., LT1964ES5-SD#PBF
47 1 U12 IC., NL17SZ74, US8 On SEMI., NL17SZ74USG
48 1 U13 IC., NC7ST04P5X SC70-5 Fairchild, NC7ST04P5X
49 1 U14 IC., EPM240GT100C5N TQFP-100 Altera Corp., EPM240GT100C5N
50 1 U15 IC., NC7SZ04P5X SC70-5 Fairchild, NC7SZ04P5X
51 1 U16 IC., NC7SVU04P5X SC70-5 Fairchild, NC7SVU04P5X
52 4 (Stand-Off) Stand-Off, Nylon 0.25” Keystone, 8831(Snap On)
53 1 Fab, Printed Circuit Board Demo Circuit 1501A
1 DC1501A-A
1 1 DC1501A General BOM
2 1 U1 IC., LTC2393CLX-16, LQFP-7X7, 48-Pin Linear Tech., LTC2393CLX-16#PBF
DC1501A-B
1 1 DC1501A General BOM
2 1 U1 IC., LTC2392CLX-16 LQFP-7X7, 48-Pin Linear Tech,. LTC2392CLX-16#PBF
DC1501A-C
1 1 DC1501A-C General BOM
2 1 U1 IC., LTC2391CLX-16 LQFP-7X7, 48-Pin Linear Tech,. LTC2391CLX-16#PBF
PARTS LIST

9
dc1501A
DEMO MANUAL DC1501A
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
DD
CC
BB
AA
FLT
EXT_VCM
80MHz MAX
CLK
3.3VPP
AIN+
0V - 4.096V
AIN-
0V - 4.096V
-INPUT
2.048V
GND
-AIN
VCM EXT
INT
REFSNS
GND
REFIN
EXT ADC
REFOUT
REFIN GND
CSL RDL
HIGH
LOW
-COUPLING
AC DC
DC
AC
+COUPLING
SER_PARL
OB/2CL
VREF
+3.3V
+3.3V
+5V
+3.3V
+3.3V
BUSY D17 D16 D15 D14 D13/SCLK D12/SDOUT D11/SDIN D10 D9 D7 D6 D5
D4
D3
D2
BYTESWAP_D1/A1 GND_D0/A0
OB2C
SER_PARL_MODE0
GND_MODE1
CLK
CNVSTL
VCM
VCM
VREF
VCM_BIAS
VCM_BIAS
VCM_BIAS
SER_PARL 16_18L
D8
DB0 DB1
DB2
DB3 DB4 DB5 DB6 DB7 DB8
DB13
DB12 DB11
DB9
DB10
DB14 DB15
CLKOUT
CNVST_33 DB16
DB17
SIZE DATE:
IC NO.
REV
SHEET OF
TITLE:
CONTRACT NO.
APPROVALS
PCB DES.
ENG.
TECHNOLOGY
Fax: [phone] Milpitas, CA 95035 Phone: [phone]
1630 McCarthy Blvd.
LTC Condential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
2
DEMO CIRCUIT 1501A
Thursday, October 29, 2009
1
2
K. TRAN
G. HOOVER
LOW NOISE HIGH SPEED SAR ADC FAMILY
LTC23XXCLX FAMILY
B
SCALE: NONE
SIZE DATE:
IC NO.
TITLE:
CONTRACT NO.
APPROVALS
PCB DES.
ENG.
TECHNOLOGY
Fax: [phone] Milpitas, CA 95035 Phone: [phone]
1630 McCarthy Blvd.
LTC Condential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
DEMO CIRCUIT 1501A
K. TRAN
G. HOOVER
LTC23XXCLX FAMILY
B
SCALE: NONE
SIZE DATE:
IC NO.
TITLE:
CONTRACT NO.
APPROVALS
PCB DES.
ENG.
TECHNOLOGY
Fax: [phone] Milpitas, CA 95035 Phone: [phone]
1630 McCarthy Blvd.
LTC Condential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
DEMO CIRCUIT 1501A
K. TRAN
G. HOOVER
LTC23XXCLX FAMILY
B
SCALE: NONE
REVISION HISTORY DESCRIPTION DATE
APPROVED
ECO REV
G. HOOVERPRODUCTION
210-29-09
1
ECO REV
PRODUCTION
210-29-09
1 1
R10
4.99K
R10
R38
OPT
R38
OPT
R47 300 R47 300
C9
OPT
C9
OPT
C55 OPT
C55 OPT
R30
1.00K
R30
1.00K
R19
1.00K
R19
1.00K
J20
J20
1
2
3
J7J7
1
2
3
R52 49.9
0402
R52 49.9
0402
R53
opt
R53
opt
R55
OPT
R55
OPT
R1
0
R1
0
U15
NC7SZ04P5X
U15
NC7SZ04P5X
4
53
2
R54
10K
R54
10K
C11
0.1uF
C11
0.1uF
R6
0
R6
0
R18
1.00K
R18
1.00K
C36 1uF C36 1uF
C34 0.1uF C34 0.1uF
C33 1.0uF C33 1.0uF
C50 0.1uF C50 0.1uF
U12
NL17SZ74
U12
NL17SZ74
CP 1
D2
Q
3
GND
4
Q
5
CLR
6
PR 7
VCC 8
J16
BNC
J16
BNC
C35
0.1uF
C35
0.1uF
R49
33
R49
33
C37
10uF
C37
10uF
J11J11
1
2
3
R48 300 R48 300
U2A
LT1807CMS8
U2A
LT1807CMS8
+IN
3
-IN
2
OUT 1
J21J21
1
2
3
C1 OPT C1 OPT
U16
NC7SVU04P5X
U16
NC7SVU04P5X
4
53
2
J1
3201S-40G1
J1
3201S-40G1
1
122
3
344
5
566
7
788
9
910 10
11
11 12 12
13
13 14 14
15
15 16 16
17
17 18 18
19
19 20 20
21
21 22 22
23
23 24 24
25
25 26 26
27
27 28 28
29
29 30 30
31
31 32 32
33
33 34 34
35
35 36 36
37
37 38 38
39
39 40 40
R17
49.9 1206
R17
49.9 1206
C53
10uF
C53
10uF U4
24LC025
U4
24LC025
A0 1
A1 2
A2 3
VSS
4
SDA 5
SCL 6
WP 7
VCC 8
C51
10uF
C51
10uF
U1A
*
U1A
*
SER_PARL_MODE0
4
GND_MODE1
5
OB/2CL
6
D0/A0 7 D1/A1 8
D2 9 D3 10
D4 11
D5 12 D6 13 D7 14
D8 15 D9 16
D10 21
D11/SDIN 22
D12/SDOUT 23
D13/SCLK 24
D14 25
D15 26
D16 27 D17 28
BUSY 29
RDL
30
CSL
31
RESET
32
PD
33
CNVSTL 34
REFOUT 37
REFIN 38
REFSENSE 39
-IN
42
+IN
43
VCM
36
R45 300 R45 300
R9 4.99K R9
C32 0.1uF C32 0.1uF
C52 OPT C52 OPT
R37
1.00K
R37
1.00K
R11 1K R11 1K
R4
301
R4
301
R40
10K
R40
10K
R50
opt
R50
opt
R20
33
R20
33
C2
2200pF
1206
NP0
C2
2200pF
1206
NP0
U2B
LT1807CMS8
U2B
LT1807CMS8
-IN
6
OUT 7
+IN
5
R3
249 1%
R3
249 1%
R46 300 R46 300
J17
BNC
J17
BNC
R43
10K
R43
10K
R22
33
R22
33
C39 OPT C39 OPT
R28
1K
R28
1K
J8
J8
1
2
3
R8
4.99K
R8
R36
OPT
R36
OPT
C41
1uF
C41
1uF
R7
301
R7
301
R51 49.9
0402
R51 49.9
0402
C38 0.1uF
C38 0.1uF
C27
0.1uF
C27
0.1uF
R12 1K R12 1K
R5
301
R5
301
C10
10uF
C10
10uF
U13
NC7ST04P5X
U13
NC7ST04P5X
4
53
2
R29
OPT
R29
OPT
R2
249
1% R2
249
1%
R42
10K
R42
10K
J18
BNC
J18
BNC
J2J2
12
3
56
4
E1E1
LT1790ACS6-4.096
U5
LT1790ACS6-4.096
U5
GND
1
GND
2
Vin
4Vout 6
C54
OPT
C54
OPT
ON
1234
SW1
219-4MST
ON
1234
SW1
219-4MST
1 2
8 7
3
5
6
4
J6J6
1
2
3
R41
10K
R41
10K
*
Msps
1
J2 SHUNT
FULLY DIFFERENTIAL
YES YES YES
-A
ASSY U1
LTC2393CLX-16
BITS
16
0.5
-B LTC2392CLX-16 16
0.25
-C LTC2391CLX-16 16
-AIN -AIN -AIN

10
dc1501A
DEMO MANUAL DC1501A
SCHEMATIC DIAGRAM
5 5
4
4
3
3
2 2
1 1
D D C C
BB A A
+9V/+10VIN
+1.8V
+3.3V
+5V
V+
-9V/-10VIN V-
OPAMP
OPAMP
VCCINT
VCCIO
ADC_LOGIC
GND
CNTRL
POWER
VCCIO
+3.3V +2.5V
V+
V-
+5V +3.3V
+9V_IN
+1.8V
+3.3V
+5V
V+
-9V_IN V-
+3.3V +1.8V
+3.3V
D14 D9 D13/SCLK D15 D3 D4 D7
D8 D16
D6 D2 BUSY D11/SDIN D17 D10 D5 D12/SDOUT BYTESWAP_D1/A1
GND_D0/A0
SER_PARL_MODE0
OB2C
GND_MODE1
SER_PARL 16_18L
DB0
DB8
DB14
DB1
DB10
DB6
DB13
DB12
DB5
DB7
DB11
CLKOUT
DB15
DB4
DB2
DB9 DB3
CLK
DEV_OE
DEV_CLRN
CNVST_33
DB16 DB17
SIZE DATE:
IC NO.
REV
SHEET OF
TITLE:
CONTRACT NO.
APPROVALS
PCB DES.
ENG.
TECHNOLOGY
Fax: [phone] Milpitas, CA 95035 Phone: [phone]
1630 McCarthy Blvd. LTC Condential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGYHAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
2
DEMO CIRCUIT 1501A
Thursday, October 29, 2009
2
2
K. TRAN
G. HOOVER
LOW NOISE HIGH SPEED SAR ADC FAMILY
LTC23XXCLX FAMILY
B
SCALE: NONE
SIZE DATE:
IC NO.
REV
SHEET OF
TITLE:
CONTRACT NO.
APPROVALS
PCB DES.
ENG.
TECHNOLOGY
Fax: [phone] Milpitas, CA 95035 Phone: [phone]
1630 McCarthy Blvd. LTC Condential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGYHAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
2
DEMO CIRCUIT 1501A
Thursday, October 29, 2009
2
2
K. TRAN
G. HOOVER
LOW NOISE HIGH SPEED SAR ADC FAMILY
LTC23XXCLX FAMILY
B
SCALE: NONE
SIZE DATE:
IC NO.
REV
SHEET OF
TITLE:
CONTRACT NO.
APPROVALS
PCB DES.
ENG.
TECHNOLOGY
Fax: [phone] Milpitas, CA 95035 Phone: [phone]
1630 McCarthy Blvd. LTC Condential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGYHAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
2
DEMO CIRCUIT 1501A
Thursday, October 29, 2009
2
2
K. TRAN
G. HOOVER
LOW NOISE HIGH SPEED SAR ADC FAMILY
LTC23XXCLX FAMILY
B
SCALE: NONE
REVISION HISTORY DESCRIPTION DATEAPPROVEDECO REV
G. HOOVER
PRODUCTION
210-29-09
1
REVISION HISTORY DESCRIPTION DATEAPPROVEDECO REV
G. HOOVER
PRODUCTION
210-29-09
1
REVISION HISTORY DESCRIPTION DATEAPPROVEDECO REV
G. HOOVER
PRODUCTION
210-29-09
1
C26
47uF
1210
16V
C26
47uF
1210
16V
J13J13
1
2
3
U6
LT1763CS8-1.8
U6
LT1763CS8-1.8
OUT 1
SEN 2
GND
3
BYP 4
SHDN
5
GND
6
GND
7
IN
8
C29
0.1uF
C29
0.1uF
C14
10uF
10V
C14
10uF
10V
C31 0.1uF
C31 0.1uF
C44
0.1uF
C44
0.1uF
C23
1uF 16V
C23
1uF 16V
U10 LT1964ES5-SD U10 LT1964ES5-SD
GND
1ADJ 4
SHDN
3
IN
2OUT 5
U14B
EPM240T
U14B
EPM240T
IO26 26
IO27 27
IO28 28 IO29 29
IO30 30 IO33 33
IO34 34 IO35 35 IO36 36 IO37 37 IO38 38 IO39 39
IO40 40
IO41 41 IO42 42
IO47 47 IO48 48 IO49 49 IO50 50
C25 1uF 16V C25 1uF 16V
E9E9
U8
LT1763CS8-5
U8
LT1763CS8-5
OUT 1
SEN 2
GND
3
BYP 4
SHDN
5
GND
6
GND
7
IN
8
E4E4
D1D1
C42
0.1uF
C42
0.1uF
C48
0.1uF
C48
0.1uF
R14
1.00K
R14
1.00K
E3
E3
C24 1uF
16V
C24 1uF
16V
C13
10uF
10V C13
10uF
10V
R33 1K
R33 1K
E2
E2
C5
1uF
C5
1uF
C47
0.1uF
C47
0.1uF
C19
0.01uF
C19
0.01uF
C16 1uF 16V C16 1uF 16V
E8E8
C40
4.7uF
4V C40
4.7uF
4V
C18
10uF
C18
10uF
JTAGJTAG
12 3 5
6
4
78
10 9
R16
1.00K
R16
1.00K
E7E7
D7
D7 D10 D10 D13D13
C22
10uF
C22
10uF
D16D16
R24
1.0
R24
1.0
U14C
EPM240T
U14C
EPM240T
IO51 51 IO52 52
IO53 53
IO54 54
IO55 55 IO56 56 IO57 57 IO58 58 IO61 61 IO66 66
IO67 67
IO68 68 IO69 69 IO70 70 IO71 71 IO72 72 IO73 73 IO74 74 IO75 75
D6D6 D9D9 D12D12 D15D15 D8D8 D11D11 D14 D14 D17 D17
U14F
EPM240T
U14F
EPM240T
VCCINT
13
VCCINT
63
VCCIO1
9
VCCIO1
31
VCCIO2
94
VCCIO1
45
VCCIO2
59
VCCIO2
80
GND 10
GND 11 GND 32 GND 46
GND 60 GND 93
GND 65
GND 79
U14E
EPM240T
U14E
EPM240T
GCLK0
12
GCLK1
14
GCLK2
62
GCLK3
64
DEV_OE
43
DEV_CLRN
44
TMS
22
TDI
23
TCK
24
TDO
25
R26
1.54K
R26
1.54K
C45
0.1uF
C45
0.1uF
D5D5
C28
10uF
C28
10uF
U2C LT1807CMS8
U2C LT1807CMS8
V-
4V+ 8
C12 1uF 16V C12 1uF 16V
U1B
*
U1B
*
OGND
17
GND
1
GND
20
GND
35
GND
41
GND
44
AVP/AVL 47
AVP 46
AVP 45
AVP 40
AVP 2
DVP 19
DVP/DVL 3
OVP 18
GND
48
U7
LT1763CS8
U7
LT1763CS8
OUT 1
SEN 2
GND
3
BYP 4
SHDN
5
GND
6
GND
7
IN
8
D0D0
R15
3.92K
R15
3.92K
R13
3.92K
R13
3.92K
D3D3
C49
0.1uF
C49
0.1uF
R25
1.69K
R25
1.69K
D2D2
R32 1K R32 1K
D4D4
R34
1K
R34
1K
C17
0.01uF
C17
0.01uF
C43
0.1uF
C43
0.1uF
C7
1uF
C7
1uF
U14D
EPM240T
U14D
EPM240T
IO76 76 IO77 77 IO78 78 IO81 81 IO82 82 IO83 83 IO84 84 IO85 85 IO86 86 IO87 87 IO88 88 IO89 89 IO90 90 IO91 91 IO92 92 IO95 95 IO96 96 IO97 97
IO98 98
IO99 99
IO100 100
C15
0.01uF
C15
0.01uF
C21
0.01uF
C21
0.01uF
R31 1K R31 1K
U14A EPM240T
U14A EPM240T
IO1 1 IO2 2
IO3 3 IO4 4
IO5 5
IO6 6
IO7 7 IO8 8
IO15 15
IO16 16
IO17 17
IO18 18
IO19 19 IO20 20 IO21 21
U9
LT1763CS8
U9
LT1763CS8
OUT 1
SEN 2
GND
3
BYP 4
SHDN
5
GND
6
GND
7
IN
8
C20
10uF
C20
10uF
C4
1uF
C4
1uF
R35
10K
R35
10K
E6
E6
R27
2.80K
R27
2.80K
C46
0.1uF
C46
0.1uF
BUSYBUSY
E5E5
C30
10uF
C30
10uF