Texas Instruments ADS1285EVM-PDK, User Manual, Page: 30 / 40

DAC_SWOUTP
DAC_SWOUTN
Connects to 'DC127_DAC' page
This input is reserved
for the DAC1282
+VINP1
-VINN1
+VINP2
-VINN2
GND
VOCM
AVSS
1µF
C39
AVSS
1.00M
R63
AVDD1
AVSS
37.4
R62
AVSS
Vocm
Common-mode buffer
1.00k R57
Power disspation:
10.3 uW (2.5 uA @ 4.096V)
1
2
3
4
5
U9
OPA369AIDCKT
TLV9041 can
replace
10.0k R61
To bypass buffer
+VINP1
-VINN1
Vocm
Vocm
Connects to 'DC127_ADC' page
AIN1P
AIN1N
AIN2P
AIN2N
Connects to 'DC127_ADC' page
+VINP2
-VINN2
Vdiv
0
R64
GND
Vocm
C0G/NP0
1000pF
C29
C0G/NP0
1000pF
C31
C0G/NP0
1000pF
C32
C0G/NP0
1000pF
C34
0.1uF
C36
1uF
C38
1
2
J14
0
R56
0
R58
22.6k
R45
22.6k
R46
22.6k
R51
22.6k
R52
1.00M
R60
AVSS
AVDD1
1
2
3
J12
GND
1
2
3
J13
GND
33nF
50V
C35
33nF
50V
C37
Vdiv
NP0
1nF
C30
NP0
1nF
C33
20
R50
20
R54
0
R55
0
R59
VOUTN_SWINN
VOUTP_SWINP
20
R48
20
R47
20
R43
20
R44
20
R49
20
R53
Place differentialRC filter
stages close to ADC input pins
Recommended input protection:
TPD4E1B06DCKR
Figure 9-9. ADS1285EVM-PDK Analog Inputs and Common-Mode Buffer Schematic
ADS1285EVM-PDK Bill of Materials, PCB Layout, and Schematics www.ti.com
30 ADS1285EVM-PDK Evaluation Module SBAU394A – APRIL 2022 – REVISED SEPTEMBER 2022
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