DC1996A - Demo Manual

DEMO MANUAL DC1996A
LTC2323/LTC2321
Dual 16-Bit/14-Bit/12-Bit,
5Msps/2Msps, Serial,
High Speed SAR ADCs
DESCRIPTION
Demonstration circuit 1996A features the LTC®2323 family.
With up to 5Msps, these differential, dual channel, 16-bit,
serial, high speed successive approximation register
(SAR) ADCs are available in a 28-lead QFN package. The
LTC2323 family has an internal 20ppm/°C reference and
an SPI-compatible serial interface that supports CMOS
and LVDS logic. Note the demo board is configured for
CMOS operation by default; see the note under JP3 for
LVDS operation. The following text refers to the LTC2323,
but applies to all members of the family, the only difference being the sample rate and the number of bits. The
DC1996A demonstrates the DC and AC performance of
the LTC2323 in conjunction with the DC890 PScope™
data collection board. Alternatively, by connecting the
DC1996A into a customer application, the performance
of the LTC2323 can be evaluated directly in that circuit.
Design files for this circuit board are available at
http://www.linear.com/demo
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and PScope
is a trademark of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
BOARD PHOTO
DC POWER SUPPLY
–9.5VDC GND 9.5VDC
BPF
HP8642B
DC890
TO PC USB PORT
dc1996a F02
BPF
HP8642B
Figure 1. DC1996A Connection Diagram
dc1996afb
1
DEMO MANUAL DC1996A
ASSEMBLY OPTIONS
Table 1. DC1996A Assembly Options
VERSION
U1 PART NUMBER
MAX CONVERSION RATE
# OF BITS
MAX CLOCK FREQUENCY
DC1996A-A
LTC2323CUFD-16#PBF
5Msps
16
110MHz
DC1996A-B
LTC2321CUFD-16#PBF
2Msps
16
64MHz
DC1996A-C
LTC2323CUFD-14#PBF
5Msps
14
110MHz
DC1996A-D
LTC2321CUFD-14#PBF
2Msps
14
62MHz
DC1996A-E
LTC2323CUFD-12 #PBF
5Msps
12
95MHz
DC1996A-F
LTC2321CUFD-12#PBF
2Msps
12
58MHz
QUICK START PROCEDURE
Demonstration circuit 1996A is easy to set up and evaluate
for performance. Refer to Figure 1 and follow the procedure below.
n
n
n
n
n
Connect the DC1996A to a DC890 USB high speed data
collection board using edge connector P1.
The PScope software should recognize the DC1996A
and configure itself automatically.
n
Click the Collect button (Figure 2) to begin acquiring
data. The Collect button then changes to Pause, which
can be used to stop data acquisition.
Connect the DC890 to a host PC with a standard USB
A/B cable.
Apply a low jitter signal source to J2 to test channel
2, or to J4 to test channel 1. Note that the DC1996A
is capable of accepting a differential input signal as
well as a single-ended signal. See the Hardware Setup
section for the jumper positions that correspond to
these configurations.
As a clock source, apply a low jitter 10dBm sine wave or
square wave to connector J1. See Table 1 for maximum
clock frequencies. Note that J1 has a 50Ω termination
resistor to ground.
Run the PScope software (Pscope.exe version K73,
or later) supplied with the DC890 or download it from
www.linear.com/software. 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.
Figure 2. DC1996A PScope Screenshot
dc1996afb
2
DEMO MANUAL DC1996A
HARDWARE SETUP
SIGNAL CONNECTIONS
J1 CLK IN: This input has a 50Ω termination resistor,
and is intended to be driven by a low jitter 10dBm sine or
square wave. To achieve the full AC performance of this
part, the clock jitter should be kept under 2ps. This input
is capacitively coupled so that the input clock can be either
0V to 3.3V or ±1.65V. This eliminates the need for level
shifting. To run at the maximum conversion rate, apply
the frequency specified in the Table 1.
J2 Ch2+ Input: In the single-ended configuration, this is
the channel 2 signal input. For differential operation, this
serves as the positive channel 2 signal input.
J3 Ch2– Input: This input is used only for differential
operation. It serves as the negative channel 2 signal input.
J4 Ch1+ Input: In the single-ended configuration, this is
the channel 1 signal input. For differential operation, this
serves as the positive channel 1 signal input.
J5 Ch1– Input: This input is used only for differential
operation. It serves as the negative channel 1 signal input.
J6 FPGA Program: Factory use only.
J7 JTAG: Factory use only.
JP1 +IN2 Coupling: Use this jumper to select AC- or DCcoupling of the signal applied to J2. The default setting
is DC. At very low input frequencies, using AC-coupling
may degrade the distortion performance.
JP2 Mode: Use this jumper to select the signal input mode
for the channel 2 input of the LTC2323. The default setting
is Diff. The Diff setting accepts a single-ended signal from
J2 and applies it as a differential signal to channel 2 of the
LTC2323. The Bip setting accepts a single-ended signal
from J2 and applies it as a single-ended bipolar signal to
channel 2 of the LTC2323. The Uni setting also accepts a
single-ended signal from J2, but applies it as a unipolar
signal to channel 2 of the LTC2323.
JP3 Data Out: Use this jumper to select the data output
format from the LTC2323. The default setting is CMOS.
The output data will not be valid if the jumper is moved
to the LVDS position unless the following changes have
been made:
Install 100Ω S0402 resistors at R26, 75, 76, 99
Reprogram the CPLD through J6 using the programming file LTC2323.pof found at:
http://www.linear.com/demo/DC1996A
Move JP3 to the LVDS position.
JP4 –IN2 Coupling: Use this jumper to select AC- or DCcoupling of the signal applied to J3. The default setting
is DC. At very low input frequencies, using AC-coupling
may degrade the distortion performance.
JP5 +IN1 Coupling: Use this jumper to select AC- or DCcoupling of the signal applied to J4. The default setting
is DC. At very low input frequencies, using AC-coupling
may degrade the distortion performance.
JP6 CM1: Use this jumper to set the DC bias point for the
signal applied to J4 when JP5 (+IN1 coupling) is in the
AC position. The default setting is ADC. The EXT setting
allows the use of an externally applied common mode
voltage applied at E1 (EXT_CM1).
JP7 CM2: Use this jumper to set the DC bias point for the
signal applied to J2 when JP1 (+IN2 coupling) is in the
AC position. The default setting is ADC. The EXT setting
allows the use of an externally applied common mode
voltage applied at E2 (EXT_CM2).
JP8 Mode: Use this jumper to select the signal input mode
for the channel 1 input of the LTC2323. The default setting
is Diff. The Diff setting accepts a single-ended signal from
J4 and applies it as a differential signal to channel 1 of the
LTC2323. The Bip setting accepts a single-ended signal
from J4 and applies it as a single-ended bipolar signal to
channel 1 of the LTC2323. The Uni setting also accepts a
single-ended signal from J4, but applies it as a unipolar
signal to channel 1 of the LTC2323.
dc1996afb
3
DEMO MANUAL DC1996A
HARDWARE SETUP
JP9 –IN1 Coupling: Use this jumper to select AC- or DCcoupling of the signal applied to J5. The default setting
is DC. At very low input frequencies, using AC-coupling
may degrade the distortion performance.
JP10 VCCIO: Use this jumper to select the VCCIO supply voltage. The default setting is 2.5V. The 1.8V setting
selects a 1.8V supply voltage.
JP11 VDD: Use this jumper to select the VDD supply voltage. The default setting is 5V. The 3.3V setting selects a
3.3V supply voltage.
JP12 EEPROM: Factory use only.
JP13 OSC: Use this jumper to enable the onboard encode
clock source. The default setting is OFF. The ON setting
energizes this source. Refer to the DC1996A schematic for
additional passive elements required to use the onboard
source.
PARTS LIST
ITEM
QTY REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
Required Circuit Components
1
20
C1, C2, C4, C5, C9, C11, C13, C18, C19,
C22, C23, C29, C37, C51, C52, C58, C59,
C82, C129, C130
CAP., X7R, 0.1µF, 16V, 10%, 0603
NIC, NMC0603X7R104K16TRPF
2
24
C3, C6, C16, C17, C20, C21, C24-C26,
C28, C30, C34, C47-C50, C53, C54, C57,
C61, C70, C76, C79, C81
CAP., X5R, 10µF, 6.3V, 20%, 0603
NIC, NMC0603X5R106M6.3TRPF4KF
3
0
C7, C8, C10, C14, C27, C35, C36, C40,
C41, C60
CAP., 0603
OPT
4
2
C12, C41
CAP., NPO, 200pF, 16V, 5%, 0603
MURAA, GRM1885C1H201JA01D
5
12
C15, C32, C38, C39, C43, C45, C65, C67,
C68, C71, C74, C77
CAP., X7R, 1µF, 25V, 10%, 0603
TDK, C1608X7R1E105K
6
6
C31, C33, C55, C56, C106, C119
CAP., X5R, 4.7µF, 6.3V, 10%, 0603
AVX, 06036D475KAT2A
7
2
C42, C44
CAP., X5R, 2.2µF, 10V, 10%, 0603
MURATA, GRM188R61A225KE34D
8
1
C62
CAP., X7R, 47µF, 10V, 10%, 1210
MURATA, GRM32ER71A476KE15L
9
5
C63, C69, C72, C75, C78
CAP., X7R, 0.01µF, 6.3V, 10%, 0603
MURATA, GRM188R70J103KA01D
10
3
C64, C66, C73
CAP., X7R, 10µF, 10V, 10%, 0805
MURATA, GRM21BR71A106KE51L
11
1
C80
CAP., X5R, 3.3µF, 6.3V, 10%, 0603
AVX, 06036D335KAT2A
12
28
C83-C104, C108, C122-C126
CAP., X7R, 0.1µF, 16V, 10%, 0402
NIC, NMC0402X7R104K16TRPF
13
1
C105
CAP., X5R, 47µF, 6.3V, 20%, 0805
TAIYO YUDEN, JMK212BJ476MG-T
14
3
C107, C120, C121
CAP., X7R, 0.01µF, 16V, 10%, 0402
NIC, NMC0402X7R103K16TRPF
15
1
C109
CAP., X7R, 1nF, 16V, 10%, 0402
AVX, 0402YC102KAT2A
16
3
C110, C111, C112
CAP., X7R, 22nF, 16V, 10%, 0402
AVX, 0402YC223KAT2A
17
2
C113, C128
CAP., X7R, 4.7nF, 16V, 10%, 0402
AVX, 0402YC472KAT2A
18
4
C114, C115, C116, C117
CAP., NP0, 10pF, 16V, 10%, 0402
AVX, 0402YA100KAT2A
19
1
C118
CAP., TANT, 470µF 10V, 20%, 7343
AVX, TPSE477M010R0050
20
1
C127
CAP., X7R, 2.2nF, 16V, 10%, 0402
AVX, 0402YC222KAT2A
21
4
D1, D2, D3, D4
DIODE, SCHOTTKY, 30V, 200mW SOD-323
DIODE INC., BAT54WS-7-F
22
9
E1-E3, E5, E8-E12
TEST POINT, TURRET, 0.064"
MILL-MAX, 2308-2-00-80-00-00-07-0
23
3
E4, E6, E7
TEST POINT, TURRET, 0.094"
MILL-MAX, 2501-2-00-80-00-00-07-0
dc1996afb
4
DEMO MANUAL DC1996A
PARTS LIST
ITEM
QTY REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
24
11
JP1, JP3-JP7, JP9-JP11, JP13, JP15
HEADER, 1×3, 0.100"
SAMTEC, TSW-103-07-L-S
25
2
JP2, JP8
HEADER, 2×3, 0.100"
SAMTEC, TSW-103-07-L-D
26
2
J6, J7
HEADER, 2×5, 0.100"
SAMTEC, TSW-105-07-L-D
27
5
J1, J2, J3, J4, J5
CONN BNC FEM JACK PC MNT STRGHT
AMPHENOL CONNEX, 112404
28
1
L1
IND, FERRITE CHIP, 390Ω, 2000mA, 1206
MURATA, BLM31PG391SN1L
29
15
R1, R2, R10, R21, R27, R46-R48, R51,
R52, R57, R58, R60, R64, R66
RES., CHIP, 1k, 1/10W, 1%, 0603
PANASONIC, ERJ-3EKF1001V
30
0
R3, R7, R11, R22, R23, R25, R28, R29,
R32, R34, R36, R37, R49, R50, R54,
R123
RES., CHIP, 0603
OPT
31
2
R4, R17
RES., CHIP, 33Ω, 1/10W, 5%, 0603
PANASONIC, ERJ-3GEYJ330V
32
11
R5, R6, R12, R20, R24, R30, R31, R35,
R39, R40, R53
RES., CHIP, 0Ω, 1/10W, 0603
PANASONIC, ERJ-3GEY0R00V
33
4
R8, R18, R33, R44
RES., CHIP, 49.9Ω, 1/10W, 1%, 0603
PANASONIC, ERJ-3EKF49R9V
34
1
R9
RES., CHIP, 49.9Ω, 1/4W, 1%, 1206
PANASONIC, ERJ-8ENF49R9V,
35
4
R13, R16, R38, R43
RES., CHIP, 0Ω, 1/16W, 0402
PANASONIC, ERJ-2GE0R00X
36
4
R14, R15, R41, R42
RES., CHIP, 301, 1/10W, 1%, 0603
PANASONIC, ERJ-3EKF3010V
37
2
R19, R45
RES., CHIP, 150, 1/10W, 1%, 0603
PANASONIC, ERJ-3EKF1500V
38
0
R26, R75, R76, R99
RES., CHIP, 0402
39
2
R55, R56
RES., CHIP, 3.92k, 1/10W, 1%, 0603
PANASONIC, ERJ-3EKF3921V
40
1
R59
RES., CHIP, 499Ω, 1/10W, 1%, 0603
PANASONIC, ERJ-3EKF4990V
41
1
R61
RES., CHIP, 866Ω, 1/10W, 1%, 0603
PANASONIC, ERJ-3EKF8660V
42
1
R62
RES., CHIP, 3.09k, 1/10W, 1%, 0603
PANASONIC, ERJ-3EKF3091V
43
1
R63
RES., CHIP, 4.02k, 1/10W, 1%, 0603
PANASONIC, ERJ-3EKF4021V
44
1
R65
RES., CHIP, 1.43k, 1/10W, 1%, 0603
PANASONIC, ERJ-3EKF1431V
45
33
R69-R72, R77-R98, R100-R104, R119,
R120
RES., CHIP, 33Ω, 1/16W, 5%, 0402
PANASONIC, ERJ-2GEJ330X
46
1
R118
RES., CHIP, 1k, 1/16W, 1%, 0402
PANASONIC, ERJ-2EKF1001V
47
4
R105, R106, R107, R108
RES., CHIP, 4.99k, 1/10W, 1%, 0603
PANASONIC, ERJ-3EKF4991V
48
9
R109-R117
RES., CHIP, 10k, 1/16W, 5%, 0402
PANASONIC, ERJ-2GEYJ103V
49
1
R121
RES., CHIP, 10k, 1/16W, 5%, 0603
PANASONIC, ERJ-3GEYJ103V
50
1
R122
RES., CHIP, 100Ω, 1/10W, 1%, 0603
PANASONIC, ERJ-3EKF1000V
51
3
U2, U3, U7
IC, INVERTER, UHS, SINGLE, SC70-5
FAIRCHILD, NC7SZ04P5X
52
2
U4, U5
IC, 400MHz, AMPLIFIER, MS8
LINEAR TECHNOLOGY, LT1819CMS8#PBF
53
1
U6
IC, FLIP FLOP, D-TYPE LOG, US8
ON SEMI., NL17SZ74USG
54
2
U8, U9
IC, VOLTAGE REFERENCE, MSOP8
LINEAR TECHNOLOGY, LTC6655BHMS84.096#PBF
55
2
U10, U21
IC, OP-AMP, MS8
LINEAR TECHNOLOGY, LT6202CS5#PBF
56
4
U11, U13, U14, U15
IC, MICROPOWER REGULATOR, SO8
LINEAR TECHNOLOGY, LT1763CS8#PBF
57
1
U12
IC, MICROPOWER NEG. REGULATOR,
SOT-23
LINEAR TECHNOLOGY, LT1964ES5-SD#PBF
58
1
U16
IC, MICROPOWER REGULATOR, SO8
LINEAR TECHNOLOGY, LT1763CS8-2.5#PBF
59
1
U17
IC, LINEAR REGULATOR, SO8
LINEAR TECHNOLOGY, LT3021ES8-1.2#PBF
dc1996afb
5
DEMO MANUAL DC1996A
PARTS LIST
ITEM
QTY REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
60
1
U18
IC, EQFP, CYCLONE3, WIRE BOND,
EQFP144
ALTERA, EP3C5E144C7
61
1
U19
IC, 4-BIT, FLASH MEMORY, SO8
ALTERA, EPCS4SI8
62
1
U20
IC, EEPROM, 2kBIT, 400kHz, 8TSSOP
MICROCHIP, 24LC024-I/ST
63
1
Y1
OSCILLATOR, 106.2500MHz, 3.3V, SMD
CTS-FREQUENCY CONTROLS, CB3LV-3I106M2500
64
12
SHOWN ON ASSY DWG
SHUNT, 0.100", 2POS
SAMTEC, SNT-100-BK-G
65
4
MH1-MH4
STANDOFF, NYLON, 0.25"
KEYSTONE, 8831 (SNAP-ON)
DC1996A-A Required Circuit Components
1
1
DC1996A GENERAL BOM
2
2
R67, R73
RES., CHIP, 1k, 1/16W, 5%, 0402
PANASONIC, ERJ-2EKF1001V
3
1
U1
I.C., DUAL SAR ADC, QFN28UFD-4X5
LINEAR TECHNOLOGY, LTC2323CUFD-16#PBF
DC1996A-B Required Circuit Components
1
1
2
2
R67, R73
DC1996A GENERAL BOM
RES., CHIP, 1k, 1/16W, 5%, 0402
PANASONIC, ERJ-2EKF1001V
3
1
U1
I.C., DUAL SAR ADC, QFN28UFD-4X5
LINEAR TECHNOLOGY, LTC2321CUFD-16#PBF
DC1996A-C Required Circuit Components
1
1
DC1996A GENERAL BOM
2
2
R68, R73
RES., CHIP, 1k, 1/16W, 5%, 0402
PANASONIC, ERJ-2EKF1001V
3
1
U1
I.C., DUAL SAR ADC, QFN28UFD-4X5
LINEAR TECHNOLOGY, LTC2323CUFD-14#PBF
DC1996A-D Required Circuit Components
1
1
2
2
R68, R73
DC1996A GENERAL BOM
RES., CHIP, 1k, 1/16W, 5%, 0402
PANASONIC, ERJ-2EKF1001V
3
1
U1
I.C., DUAL SAR ADC, QFN28UFD-4X5
LINEAR TECHNOLOGY, LTC2321CUFD-14#PBF
DC1996A-E Required Circuit Components
1
1
DC1996A GENERAL BOM
2
2
R67, R74
RES., CHIP, 1k, 1/16W, 5%, 0402
PANASONIC, ERJ-2EKF1001V
3
1
U1
I.C., DUAL SAR ADC, QFN28UFD-4X5
LINEAR TECHNOLOGY, LTC2323CUFD-12#PBF
DC1996A-F Required Circuit Components
1
1
2
2
R67, R74
DC1996A GENERAL BOM
RES., CHIP, 1k, 1/16W, 5%, 0402
PANASONIC, ERJ-2EKF1001V
3
1
U1
I.C., DUAL SAR ADC, QFN28UFD-4X5
LINEAR TECHNOLOGY, LTC2321CUFD-12#PBF
dc1996afb
6
A
B
C
D
J5
J4
J3
C7
OPT
+IN2
COUPLING
C27
OPT
C35
OPT
-IN1
COUPLING
C60
OPT
VCM_BIAS_1
R53
0
C34
10uF
6.3V
C57
10uF
6.3V
AC DC
JP9
C28
10uF
6.3V
2
4
6
C61
10uF
6.3V
R45
150
C36
OPT
R22
OPT
R14
301
R49
OPT
R41
301
R34 OPT
JP8
HD2X3-100
C53
10uF
6.3V
C50
10uF
6.3V
DIFF 1
UNI 3
BIP 5
C8
OPT
R11 OPT
R31
0
R19
150
MODE
C30
10uF
6.3V
R32
OPT
R54
OPT
R48
1k
JP5
R27
1k
2
4
6
R6
0
JP2
HD2X3-100
C24
10uF
6.3V
C21
10uF
6.3V
DIFF 1
UNI 3
BIP 5
MODE
C3
10uF
6.3V
R7
OPT
R25
OPT
R21
1k
JP4
C48
10uF
6.3V
AC DC
VCM_BIAS_1
VREF_1
+IN1
COUPLING
R30
0
C26
10uF
6.3V
AC DC
VCM_BIAS_1
-IN2
COUPLING
R24
0
VCM_BIAS_2
R1
1k
JP1
C20
10uF
6.3V
AC DC
VCM_BIAS_2
VREF_2
C6
10uF
6.3V
C54
10uF
3
2
6
5
C25
10uF
5
6
2
3
V+
-
+
V-
-
+
V-
5
1. ALL RESISTORS ARE IN OHMS, 0603.
ALL CAPACITORS ARE IN MICROFARADS, 0603
R50
OPT
R28
OPT
R23
OPT
R3
OPT
4
ASSY
A
B
C
D
E
F
R44
49.9
C41
200pF
NP0
R33
49.9
R18
49.9
C12
200pF
NP0
*
U5A
LT1819CMS8
1
R42
301
R35 0
C37 0.1uF
7
U5B
LT1819CMS8
V+ C29 0.1uF
U4B
LT1819CMS8
7
R15
301
R12 0
C9 0.1uF
1
R8
49.9
R43
0 0402
R38
0 0402
R16
0 0402
R13
0 0402
U1
LTC2323CUFD-16
LTC2321CUFD-16
LTC2323CUFD-14
LTC2321CUFD-14
LTC2323CUFD-12
LTC2321CUFD-12
C46
OPT
C40
OPT
C14
OPT
C10
OPT
3
7
6
AIN2-
AIN1+
AIN1-
BITS
16
16
14
14
12
12
2
AIN2+
LVDS
CMOS
J1
C15
1uF
VCCIO
U1
C16
10uF
6.3V
*
EXT
-
+
OPT
1k
OPT
1k
OPT
1k
3
R68
C58
V0.1uF
1
OPT
1k
R73
4
3
JP6
C55
4.7uF
1k
OPT
R74
R51
1k
C47
10uF
6.3V
R39
0
R36
OPT
C33 4.7uF
C31 4.7uF
R46
1k
EXT_CM1
E1
3
2
1
19
SDO2+ 20
SDO2-
SCK+
SCKCNVL
CLKOUT+
CLKOUT-
21
22
9
17
18
15
REFOUT2
REFOUT1
C18
0.1uF
2
SDO1+ 16
SDO1-
C23
0.1uF
C22
0.1uF
C17
10uF
6.3V
R10
1k
R2
1k
C19
0.1uF
C38
1uF
CM1
C51 V+
0.1uF
ADC
U10
LT6202CS5
C32
1uF
R67
VCM_BIAS_1
Msps
5
2
5
2
5
2
VDD
R9
49.9
1206
C5
0.1uF
VCCIO
QFN28UFD-4X5
R29
OPT
VREF_1
AIN1-
AIN1+
AIN2-
AIN2+
JP3
1
2
3
DATA OUT
CLK
200MHz MAX
2.5VPP
3
4
C1
0.1uF
C42
2.2uF
R20
33
PR
VCC
U6
NL17SZ74
7
8
VCCIO
R17
33
C11
0.1uF
U2
NC7SZ04P5X
SHDN
GND
4
3
2
1
C43
1uF
CUSTOMER NOTICE
GND
VOUT_S GND
VOUT_F VIN
GND
4
C2
0.1uF
2
4
VCCIO
VCM_BIAS_2
VREF_2
R4
33
2
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
CSB
CLKIN
EXT
-
+
SCALE = NONE
DOUG S.
KIM T.
APPROVALS
C59
V0.1uF
1
U21
LT6202CS5
3
2
1
R52
1k
R47
1k
EXT_CM2
E2
R121
10k
1
2
3
1
4
C44
2.2uF
5
6
7
TECHNOLOGY
C56
4.7uF
C49
10uF
6.3V
R40
0
R37
OPT
8
JP13
2
3
R122
100
R123
OPT
SHDN
GND
4
3
2
1
C45
1uF
DATE
04-01-14
1
LTC232XCUFD FAMILY
DEMO CIRCUIT 1996A
04/01/2014, 12:58 PM
IC NO.
SHEET 1
2
OF 3
REV.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
GND
VOUT_S GND
VOUT_F VIN
GND
U8
LTC6655BHMS8-4.096 +9V/+10V
ON
OFF
GND
EOH
OSC
OUT
Y1
CB3LV
VCC
C130
0.1uF
DOUG S.
APPROVED
TRUE DIFFERENTIAL INPUT DUAL ADC
DATE:
B
SIZE
+3V
ADD 20 MIL SQUARE
PAD OPENING ON
TOP SOLDER MASK
LAYER ON THESE
CONNETIONS.
+3V
C129
0.1uF
PRODUCTION
2
1
DESCRIPTION
REVISION HISTORY
REV
TITLE: SCHEMATIC
4
3
JP7
CM2
C39
1uF
SDO2+
SDO2-
C52 V+
0.1uF
ADC
ECO
CLKOUT+
CLKOUT-
SCK+
SCK-
SDO1+
SDO1-
U7
NC7SZ04P5X
2
C13
0.1uF
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APP ENG.
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
5
6
7
8
CLR
GND
2
VCCIO
U9
LTC6655BHMS8-4.096 +9V/+10V
6
4
U3
NC7SZ04P5X
VCCIO
5
3
C4 0.1uF
U4A
LT1819CMS8
NOTES: UNLESS OTHERWISE SPECIFIED
AIN10V - 4.096V
AIN1+
0V - 4.096V
AIN20V - 4.096V
AIN2+
0V - 4.096V
R5
0
8
4
J2
25
5
3
VCM_BIAS_2
1
4
LVDS 14
OVDD
1
CP
Q
3
3
2
1
3
2
1
3
2
1
3
2
1
5
3
2
D
Q
5
4
8
8
4
13
5
4
+
-
8
VDD1 8
VDD2
REFBG
12
28
VBYP1 24
VBYP2
GND
GND
GND
GND
GND
4
5
10
23
29
REFOUT1 26
REFOUT2
REFRTN1
REFRTN2
11
27
2
5
2
+
-
5
A
B
C
D
DEMO MANUAL DC1996A
SCHEMATIC DIAGRAMS
dc1996afb
7
A
B
C
D
5
GND
+9V/+10V
E7
E4
C62
47uF
16V
1210
C80
3.3uF
16V
C77
1uF
16V
C74
1uF
16V
C71
1uF
16V
C68
1uF
16V
C65
1uF
16V
5
8
5
8
5
8
5
8
5
8
5
8
SHDN
IN
U17
LT3021ES8-1.2
SHDN
IN
U16
LT1763CS8-2.5
SHDN
IN
U15
LT1763CS8
SHDN
IN
U14
LT1763CS8
SHDN
IN
U13
LT1763CS8
SHDN
IN
U11
LT1763CS8
AGND
+9V/+10V
GND
GND
GND
3
6
7
GND
GND
GND
3
6
7
GND
GND
GND
3
6
7
GND
GND
GND
3
6
7
GND
GND
GND
3
6
7
GND
6
8
4
5
4
SEN
OUT
BYP
SEN
OUT
BYP
SEN
OUT
BYP
SEN
OUT
BYP
SEN
OUT
BYP
SEN
OUT
4
3
2
4
2
1
4
2
1
4
2
1
4
2
1
4
2
1
C78
0.01uF
C75
0.01uF
C72
0.01uF
C69
0.01uF
C63
0.01uF
R66
1k
R65
1.43k
R64
1k
R62
3.09k
R60
1k
R59
499
R58
1k
R56
3.92k
3
2
1
JP11
VDD
R63
4.02k
JP10
VCCINT
5V
3.3V
2.5V
VCCIO
1.8V
R61
866
3
2
1
C81
10uF
6.3V
+1.2V
C79
10uF
6.3V
+2.5V
C76
10uF
6.3V
+3V
C73
10uF
10V
0805
VDD
C70
10uF
6.3V
VCCIO
C66
10uF
10V
0805
V+
E12
E11
E10
E9
E8
E5
+1.2V
+2.5V
+3V
VDD
VCCIO
V+
3
3
-9V/-10V
E6
3
SHDN
IN
GND
ADJ
OUT
U12
LT1964ES5-SD
2
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
CUSTOMER NOTICE
C67
1uF
16V
2
1
4
5
R57
1k
R55
3.92k
SCALE = NONE
DOUG S.
KIM T.
APPROVALS
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APP ENG.
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
-9V/-10V
2
E3
V-
TECHNOLOGY
V-
1
SHEET 2
LTC232XCUFD-16/-14 FAMILY
DEMO CIRCUIT 1996A
04/01/2014, 01:00 PM
IC NO.
2
OF 3
REV.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TRUE DIFFERENTIAL INPUT DUAL ADC
DATE:
B
SIZE
TITLE: SCHEMATIC
C64
10uF
10V
0805
1
A
B
C
D
DEMO MANUAL DC1996A
SCHEMATIC DIAGRAMS
dc1996afb
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
A
B
C
D
19
27
36
41
48
57
63
82
95
108
118
123
131
140
145
+
DA0
DA1
DA2
73
74
75
76
77
79
80
83
84
85
88
89
GND
GND
GNDA1
GND
GND
GND
GND
GND
GND
GNDA2
GND
GND
GND
GND
GND
5
VCCINT 29
VCCINT 45
VCCINT 61
VCCINT 78
VCCINT 102
VCCINT 116
VCCINT 134
VCCINT 17
VCCIO1 26
VCCIO2 40
VCCIO3 47
VCCIO3 56
VCCIO4 62
VCCIO4 81
VCCIO5 93
VCCIO6 117
VCCIO7 122
VCCIO7 130
VCCIO8 139
VCCIO8 35
VCCA1 107
VCCA2 37
VCCD_PLL1 109
VCCD_PLL2
CYCLONE3-EP3C5E144
PWR
U18A
CYCLONE3-EP3C5E144
IO1
IO2
IO3
IO4_RUP3
IO4_RDN3
IO5
IO6_VREF5
IO7
IO8_DIFFIOR8N
IO9_DIFFIOR8P
CLK7_DIFFCLK3N
CLK6_DIFFCLK3P
BANK5
5
*
R67
C118 C119
470uF 4.7uF
7343 0603
VCCD_PLL
C105
47uF
0805
+2.5V
C93
0.1uF
VCCIO
C83
0.1uF
+1.2V
*
R68
*
R74
*
R73
C86
0.1uF
CLK2
CLK3
IO1
IO2
IO3_VREF2
IO4_RUP1
IO5_RDN1
IO6
BANK2
C96
0.1uF
BANK6
24
25
28
30
31
32
33
34
C97
0.1uF
C87
0.1uF
C124
0.1uF
C125
0.1uF
C111
22nF
C99
0.1uF
C89
0.1uF
C126
0.1uF
C112
22nF
C100
0.1uF
C102 C103
0.1uF 0.1uF
DA5
DA3
DA4
C104
0.1uF
C127
2.2nF
C128
4.7nF
+1.2V
L1
BLM31PG391SN1L
C113
4.7nF
C101
0.1uF
33
33
33
BANK3
38
39
42
43
44
46
49
50
51
52
53
BANK7
110
111
112
113
114
115
119
120
121
124
125
126
127
CONFIG
6
IO1_DATA1 8
IO2_FLASH_NCE 9
N_STATUS 12
DCLK 13
IO3_DATA0 14
NCONFIG 15
TDI 16
TCK 18
TMS 20
TDO 21
NCE 86
IO4_DEV_OE 87
IO5_DEV_CLRN 92
CONF_DONE 94
MSEL0 96
MSEL1 97
MSEL2 98
IO6_INIT_DONE 99
IO7_CRC_ERROR 101
IO8_NCEO 103
IO9_CLKUSR
CYCLONE3-EP3C5E144
U18J
CYCLONE3-EP3C5E144
IO1
IO2
IO3
IO4
IO5_RUP4
IO6_RDN4
IO7_VREF7
IO8_DIFFIOT16N
IO9_DIFFIOT16P
IO10
IO11
IO12_DIFFIOT12N
IO13_DIFFIOT12P
U18H
CYCLONE3-EP3C5E144
IO1_DIFFIOB1P
IO2_DIFFIOB1N
IO3
IO4
IO5
IO6_VREF3
IO7_DIFFIOB9P
IO8_DIFFIOB9N
IO9
IO10_DIFFIOB11P
IO11_DIFFIOB11N
4
TDI
TCK
TMS
TDO
NCE
33
33
33
33
33
33
33
VCCIO
R116
10k
1
3
5
7
9
3
TDI
BANK4
IO1_DIFFIOB12P
IO2_DIFFIOB12N
IO3
IO4_DIFFIOB16P
IO5_DIFFIOB16N
IO6
IO7_VREF4
IO8_RUP2
IO9_RDN2
IO10
IO11
IO12_DIFFIOB21P
IO13_DIFFIOB21N
IO14
54
55
58
59
60
64
65
66
67
68
69
70
71
72
BANK8
128
129
132
133
135
136
137
138
141
142
143
144
R118
1k
R114
10k
+3V
8
C116
10pF
D3
BAT54WS
+3V
+3V
C117
10pF
C91
0.1uF
0402
2
+3V
C92
0.1uF
0402
SCALE = NONE
DOUG S.
KIM T.
APPROVALS
D4
BAT54WS
+3V
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
CUSTOMER NOTICE
C115
10pF
D2
BAT54WS
EPCS4SI8
NCS
VCC 7
DATA
VCC 6
VCC
DCLK 5
GND
ASDI
U19
J6
HD2X5-100
1
3
5
7
9
SDO1+
SDO1-
CLKOUT+
FPGA
PROGRAM
DB6
DB7
DB8
DB9
DB10
DB11
33
33
33
33
33
33
2
4
6
8
10
DB1
DB2
DB3
DB4
DB5
33
33
33
33
33
R76
OPT
R99
OPT
CLKOUT-
2
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APP ENG.
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
C114
10pF
1
2
3
4
+3V
+3V
R92
R94
R96
R98
R101
R103
R79
R81
R88
R91
R82
D1
BAT54WS
+3V
CYCLONE3-EP3C5E144
IO1_DIFFIOT11N
IO2_DIFFIOT11P
IO3_DIFFIOT10N
IO4_DIFFIOT10P
IO5
IO6_VREF8
IO7
IO8
IO9
IO10
IO11_DIFFIOT01N
IO12_DIFFIOT01P
U18I
CYCLONE3-EP3C5E144
R113
10k
TCK
TDO
TMS
R117
10k
J7
HD2X5-100
JTAG
2
4
6
8
10
R115
10k
R112
10k
SDO2+
SDO2-
R111
10k
DA10
DA11
DA12
DA13
DA14
DA15
DB0
DA6
DA7
DA8
DA9
R110
10k
R75
OPT
33
33
33
33
+2.5V
R109
10k
VCCIO
R93
R95
R97
R100
R102
R120
R104
R78
R80
R87
R90
1. ALL RESISTORS AND CAPACITORS ON THIS PAGE ARE 0402.
2. SEE ASSEMBLY TABLE ON PAGE 1 FOR R67, R68, R73, AND R74 VALUES.
NOTES: UNLESS OTHERWISE SPECIFIED
C123
0.1uF
C110
22nF
C98
0.1uF
C88
0.1uF
R83
R86
R89
C90
0.1uF
90
91
100
104
105
106
CYCLONE3-EP3C5E144
CLK5_DIFFCLK2N
CLK4_DIFFCLK2P
IO1
IO2
IO3_VREF6
IO4
C107 C108 C109
0.01uF 0.1uF 1nF
C95
0.1uF
C85
0.1uF
C120 C121 C122
0.01uF 0.01uF 0.1uF
C106
4.7uF
0603
C94
0.1uF
C84
0.1uF
VCCIO
VCCIO
CSB
CLKIN
SCK-
SCK+
DB12
DB13
DB14
CNVCLK
DB15
U18G
33
33
33
R26
OPT
33
33
33
33
33
U18F
R84
R85
R77
R69
R70
R71
R72
R119
CYCLONE3-EP3C5E144
1
2
3
4
7
10
11
22
23
CYCLONE3-EP3C5E144
IO1
IO2
IO3
IO4
IO5_VREF1
IO6_DIFFL4P
IO7_DIFFL4N
CLK0
CLK1
U18E
1
2
3
1
2
U18D
1
2
4
1
2
DA1
DA0
DA3
DA2
DA5
DA4
DA7
DA6
DA9
DA8
DA11
DA10
DA13
DA12
DA15
DA14
CNVCLK
DB1
DB0
DB3
DB2
DB5
DB4
DB7
DB6
DB9
DB8
DB11
DB10
DB13
DB12
DB15
DB14
8
VCC
GND
6
5
7
3
2
1
1
2
3
JP12
PROG
WP
EEPROM
R108
4.99k
0603
VCCIO
1
SHEET 3
LTC232XCUFD-16/-14 FAMILY
DEMO CIRCUIT 1996A
04/01/2014, 12:59 PM
IC NO.
2
OF 3
REV.
LTC Confidential-For Customer Use Only
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
R107
4.99k
0603
TECHNOLOGY Fax: (408)434-0507
SCL
SDA
WP
A2
A1
A0
R106
4.99k
0603
R105
4.99k
0603
TRUE DIFFERENTIAL INPUT DUAL ADC
DATE:
B
SIZE
C82
0.1uF
0603
55
57
59
61
63
65
67
69
71
73
75
77
79
81
83
85
87
89
91
93
95
97
99
56
58
60
62
64
66
68
70
72
74
76
78
80
82
84
86
88
90
92
94
96
98
100
1
EDGE-CON-100
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
41
43
45
47
49
51
53
P1
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
U20
24LC024-I /ST
TITLE: SCHEMATIC
4
U18C
ARRAY
BANK1
5
EEPROM
U18B
A
B
C
D
DEMO MANUAL DC1996A
SCHEMATIC DIAGRAMS
dc1996afb
9
DEMO MANUAL DC1996A
DEMONSTRATION BOARD IMPORTANT NOTICE
Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions:
This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT
OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete
in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety
measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union
directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.
If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date
of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU
OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS
FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR
ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims
arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all
appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or
agency certified (FCC, UL, CE, etc.).
No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance,
customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.
LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.
Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and
observe good laboratory practice standards. Common sense is encouraged.
This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation
dc1996afb
10 Linear Technology Corporation
LT 0414 REV B • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507 ● www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2014
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