Figure 9-8. Ads1285Evm-Pdk Adc Schematic - Texas Instruments ADS1285EVM-PDK User Manual

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Figure 9-8 through Figure 9-13 illustrate various schematics for the ADS1285EVM-PDK ADC.
AVDD1 J15
AVDD2 1
DVDD
3
5
AIN1P
AIN1N
Connects to 'DC127_Inputs' page
AIN2P
AIN2N
R71
VREFP
Connects to 'DC127_Reference' page
R72
VREFN
SBAU394A – APRIL 2022 – REVISED SEPTEMBER 2022
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All jumpers should be installed
to provide power to the ADC
2
4
C40 C41
6
1uF 0.1uF
AVSS AVSS
C42 C43
1uF 0.1uF
U10
GND GND
11
AVDD1
12
For IOVDD between 1.65-1.95 V, AVDD2
CAPD must be shorted to IOVDD
19
IOVDD
R68 0
C44 C45
1uF 0.1uF C46 220nF
17
CAPD
C47 4.7nF
9
CAPC
GND GND
C48 0.1uF 14
CAPI
C49 10nF 5
CAPP
GND C0G/NP0
6
CAPN
C50 0.047uF
7
CAPBP
C0G
C51 0.047uF 8
CAPBN
C0G
AVSS
1
AIN1P
2
AIN1N
3
AIN2P
4
AIN2N
0
30
REFP
29
C52
REFN
C53
1µF
0.1uF
16V
0 C54 0.1uF 31
CAPR
ADS1285IRHBT
AVSS
Analog-to-Digital converter

Figure 9-8. ADS1285EVM-PDK ADC Schematic

Copyright © 2022 Texas Instruments Incorporated
ADS1285EVM-PDK Bill of Materials, PCB Layout, and Schematics
DVDD
R65 R66 R67
100k 100k 100k
20
CLK CLK
22
SCLK
SCLK
23
DIN DIN
R69 49.9
24
DOUT DOUT
21
CS CS
25 R70 49.9
DRDY DRDY
26
SYNC SYNC
27
RESET RESET
28
PWDN
PWDN
15
GPIO0 GPIO0
16
GPIO1 MFLAG/GPIO1
33
EP
10
AVSS
32
AVSS
13
AGND
18
C55
DGND
1uF
GND AVSS
ADS1285_SPI Connects to 'DC127_Interface' page
ADS1285EVM-PDK Evaluation Module 29