Texas Instruments ADS1282V2EVM-PDK User Manual page 23

www.ti.com
AVSS Select and Testpoints
Bipolar or unipolar mode toggle. -2.5V UNIPOLAR BIPOLAR
rail is supplied externally on J6
JP1
-2.5V
GND
TP4
AVSS
AVSS
TP7
GND
Remove R42 to measure LDO
input current using external
ammeter
GND U5
J6
R42
-Vin
2 8
-5V ≤ -Vin ≤ -3V IN
DNP 1
0
C22
5
EN
10µF
Install J6 and supply an external
6
NR/SS
negative source to enable bipolar
operation
7
DNC
C25
0.01µF
3
NC
TPS7A3001DRBR
GND GND GND GND
Common Mode
R53
10.0k
C27
Vref
0.1uF
AVSS
R54
3
10.0k
1
R56 C28
10.0k 1µF
AVSS AVSS
SBAU431 – JULY 2024
Submit Document Feedback
TP2
GND
TP3
GND
GND GND
GND
Remove R43 to measure -2.5V
rail current using external
-2.5V
ammeter
TP8
-2.5V
-2.5V
R43
1
OUT
0
R44
11.3k C23 C24
0.01µF 10µF
2
FB
R45
10.0k
4 GND
GND
9
PAD
GND
R52
10.0k
C26
0.033µF
AVDD(5.3)
R55 TP9
4 Vocm
37.4
Vocm
U6
C29
OPA379AIDCKT
10µF
AVSS AVSS
Figure 5-2. ADS1282EVM Power Schematic
Copyright © 2024 Texas Instruments Incorporated
Remove R38 to measure LDO
input current using external
ammeter AVDD
TP5
+5.5V
5.5V U4
R38
+5.5V 15
IN OUT
16
0
IN OUT
R41
13
EN SENSE/FB
C19
82k
10µF
NR
4
6P4V2
AVSS
5
6P4V1 NC
6
3P2V NC
8
1P6V NC
9
0P8V NC
10
0P4V
11
0P2V GND
12
0P1V PAD
TPS7A4701QRGWRQ1
R46 R47 R48 R49 R50 R51
DNP DNP
0 0 0 0 0 0
AVSS
Progra mma ble LDO Configura tions
Vout (V) 3P2V 1P6V 0P8V
2.5 - - INSTALLED
3.0 - INSTALLED -
3.3 - INSTALLED -
4.5 - INSTALLED INSTALLED
5.0 INSTALLED - -
5.3 INSTALLED - -
INSTALLED = Solder 0-Ohm jumper to GND/AVSS
VOUT = 1.4V + ∑ (all grounded pins)
Hardware Design Files
Remove R39 to measure
AVDD current using external
TP6
ammeter
AVDD(5.3)
AVDD(5.3)
R39
1 Unipolar: 5.3V to GND
Bipolar: 5.3V to AVSS
20
0
R40
2.0k
3
C20
10µF
14
D1
Green AVSS
19
18
C21
17
1µF
2
7 AVSS
21
AVSS
0P4V 0P2V 0P1V
- INSTALLED INSTALLED
- - -
- INSTALLED INSTALLED
INSTALLED INSTALLED INSTALLED
INSTALLED - -
INSTALLED INSTALLED INSTALLED
ADS1282EVM-PDK Evaluation Module 23