Texas Instruments ADS1285EVM-PDK, User Manual, Page: 29 / 40

Figure 9-8 through Figure 9-13 illustrate various schematics for the ADS1285EVM-PDK ADC.
C0G/NP0
10nF C49
GND
GND
220nF C46
GND
AVSS
Analog-to-Digital converter
GND
AVSS AVSS
SCLK
DIN
DOUT
CS
DRDY
SYNC
RESET
PWDN
GPIO0
MFLAG/GPIO1
CLK
DVDD
ADS1285_SPI
VREFP
VREFN
Connects to 'DC127_Reference' page
GND GND
AIN1N
2
AIN1P
1
AIN2N
4
AIN2P
3
AVDD1
11
AVDD2
12
IOVDD
19
CAPD
17
CAPN
6
CAPP
5
CAPBN
8
CAPBP
7
CAPR
31
REFN
29
REFP
30
CAPC
9
CAPI
14
CS
21
DRDY
25
PWDN
28
RESET
27
AGND
13
AVSS
10
AVSS
32
CLK
20
DGND
18
DIN
23
DOUT
24
EP
33
GPIO0
15
GPIO1
16
SCLK
22
SYNC
26
ADS1285IRHBT
U10
Connects to 'DC127_Interface' page
AIN1P
AIN1N
AIN2P
AIN2N
Connects to 'DC127_Inputs' page
1 2
3 4
5 6
J15 AVDD1
AVDD2
DVDD
For IOVDD between 1.65-1.95 V,
CAPD must be shorted to IOVDD
0 R71
0 R72
4.7nF C47
0 R68
0.1uF
C45
0.1uF
C43
0.1uF
C41
100k
R65
100k
R66
100k
R67
All jumpers should be installed
to provide power to the ADC
1uF
C40
1uF
C42
1uF
C44
1uF
C55
49.9 R69
49.9 R70
0.1uF C48
0.1uF
C53
0.1uF C54
C0G
0.047uF C50
C0G
0.047uF C51
AVSS
AVSS
1µF
16V
C52
Figure 9-8. ADS1285EVM-PDK ADC Schematic
www.ti.com ADS1285EVM-PDK Bill of Materials, PCB Layout, and Schematics
SBAU394A – APRIL 2022 – REVISED SEPTEMBER 2022
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ADS1285EVM-PDK Evaluation Module 29
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