Schematics; Figure 7-1. Ads9218Evm Adc Connections, Amplifiers, And Reference Schematic - Texas Instruments ADS9218EVM-PDK User Manual

Bill of Materials, Schematics, and Layout

7.2 Schematics

Figure 7-1 shows the amplifier drive circuit, voltage reference connections, common-mode amplifiers, external
clock connections, and ADC decoupling.
C10
5V
10V
0.1µF
GND
R32
DNP
GND 49.9
1
J3
R7
1 2
1.00k
V+
DNP C33 VCM_FDA
4
VOCM1
25V
V-
R10
1000pF
3
1.00k
GND
J4
1
R30
DNP
49.9 GND
GND
GND
C25
5V
10V
GND 0.1µF
R33
DNP
49.9
GND 5
J7
R18
1 6
1.00k
V+
C34
DNP VCM_FDA 8
VOCM2
25V
V-
R21
1000pF
7
1.00k
GND J8
1
R34
DNP
49.9
GND
GND
GND

Figure 7-1. ADS9218EVM ADC Connections, Amplifiers, and Reference Schematic

20 ADS9218EVM-PDK Evaluation Module
C9
50V
270pF
R5
1.00k
GND
C11
50V
U6A 47pF
THS4552IPWR
R6 R8
AINP_A
15
10.0 24.9
C12
100V
14
R13 R11
470pF
AINM_A
10.0 24.9
C13
50V
47pF
GND
R14
1.00k
C14
50V
270pF
VCMOUT
DNP
C17
R35
5V
GND
10V
0.1µF
U8
OPA320AIDBVT
4
R15
VCM_FDA
1
VCMOUT
3
402
C24
10V
1uF
C18
GND GND
50V
270pF
R16
1.00k
GND
C26
50V
U6B 47pF
THS4552IPWR
R17 R19
AINP_B
11
10.0 24.9
C27
100V
10
R25 R23
470pF AINM_B
10.0 24.9
C28
50V
47pF
GND
R31
1.00k
C29
50V
270pF
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U9
5V 2 7
VIN OUTF
6
OUTS
1
EN
3
GND
4
GND
C30 C31
5
GND
10V 10V
8
GND
0.1µF 10uF
REF7040QFKHT
GND GND GND
5V
C19 C20 C21 C16
10V 10V 10V 10V
1µF 0.1µF 0.1µF 0.1µF
GND GND GND GND GND
1V8_VDD
U1
C23
13
AVDD_1V8
10V
37
AVDD_1V8
0.1µF
1
AVDD_5V
GND
10
AVDD_5V
14
DVDD_1V8
35
DVDD_1V8
36
DVDD_1V8
R9 20.0
AINP_A
3
VCM AINP_A AINP_A
AINM_A
4
AINM_A AINM_A
R12 20.0
VCMOUT 5
VCMOUT VCMOUT
R20 20.0
AINP_B
7
AINP_B AINP_B
AINM_B
8
AINM_B AINM_B
R24 20.0
SMPL_CLKP 32
SMPL_CLKP
SMPL_CLKP
EXT_SMPL_CLKM
31
SMPL_CLKM SMPL_CLKM
SCLK
18
SCLK SCLK
SDI 19
SDI SDI
SDO R22 33 20
SDO
SDO
CSz
17
CSz CS
SPI_EN
16
SPI_EN SPI_EN
RESETz 21
RESETz
RESET
PWDNz
22
PWDNz PWDN
ADS9227IRHAT
DOUTP_A DOUTP_B
R26 R27
DNP DNP
100 100
DOUTM_A DOUTM_B
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REFIO
J1
1
J10
R4
DNP
49.9
GND
J2
1
GND GND
1V8_VDD
EXT_SMPL_CLKP
SMPL_CLKP
C15 FPGA_SMPL_CLKP
10V
1µF
DOUTP_A
28
DOUTP_A
DOUTP_A
DOUTM_A
27
DOUTM_A DOUTM_A
24 DCLKP
DCLKP DCLKP
23 DCLKM
DCLKM DCLKM
FCLKP
30
FCLKP FCLKP
FCLKM
29
FCLKM FCLKM
26 DOUTP_B
DOUTP_B
DOUTP_B
DOUTM_B
25
DOUTM_B DOUTM_B
33 SMPL_SYNC
SYNC SMPL_SYNC
REFIO
39
REFIO REFIO
6
REFM
C22
11
REFM
10V
40
REFM
1µF
2
AGND
GND
9
AGND
12
AGND
38
AGND
15
DGND
34
DGND
41
Thermal_Pad
NT1
Net-Tie
GND GND
DCLKP FCLKP
R28 R29
DNP DNP
100 100
DCLKM FCLKM
SBAU409 – SEPTEMBER 2022
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EXT_SMPL_CLKP
EXT_SMPL_CLKM
J5
1
2
1
2
3
J11