Figure 3-1. Input Terminal Blocks And Headers (Schematic); Table 3-1. Analog Input Terminal Blocks (J12, J13) - Texas Instruments ADS1285EVM-PDK User Manual

www.ti.com
Recommended input protection:
TPD4E1B06DCKR
+VINP1
-VINN1
Analog inputs
+VINP2
This input is reserved
-VINN2
for the DAC1282
VOCM
GND

Figure 3-1. Input Terminal Blocks and Headers (Schematic)

Terminal Block Pin
1
J12 2
3
1
J13 2
3
SBAU394A – APRIL 2022 – REVISED SEPTEMBER 2022
Submit Document Feedback
+VINP1
R43
20
R45
J12
22.6k
1
2
3
GND
R46
22.6k
R47
20
-VINN1
+VINP2
R49
20
R51
J13
22.6k
1
2
3
GND
R52
22.6k
R53
20
-VINN2
VOUTP_SWINP
DAC_SWOUTP
Connects to 'DC127_DAC' page
DAC_SWOUTN
J14
VOUTN_SWINN
Vocm
1
2
GND

Table 3-1. Analog Input Terminal Blocks (J12, J13)

Function
Channel 1 positive input
GND
Channel 1 negative input
Channel 2 positive input
GND
Channel 2 negative input
Copyright © 2022 Texas Instruments Incorporated
Place differential RC filter
stages close to ADC input pins
R44
20
C29
C0G/NP0
1000pF
C30
Vocm
NP0
1nF
C31
C0G/NP0
1000pF
R48
20
R50
20
C32
C0G/NP0
1000pF
C33
Vocm
NP0
1nF
C34
C0G/NP0
1000pF
R54
20
R55
0
R56
0
R58
0
R59
0
ADS1285 Input Pin(s)
+VINP1
(Eventually leading to AIN1P)
AGND and DGND
–VINN1
(Eventually leading to AIN1N)
+VINP2
(Eventually leading to AIN2P)
AGND and DGND
–VINN2
(Eventually leading to AIN2N)
ADS1285EVM-PDK Evaluation Module
EVM Analog Interface
AIN1P
Connects to 'DC127_ADC' page
AIN1N
AIN2P
Connects to 'DC127_ADC' page
AIN2N
7