Texas Instruments ADS1235EVM, User Manual

Page: 28 / 34

USB_REG
0.1uF
C72
GND
1
VOUT
2
FB
3
ILIM
4
PG
5
EN
6
SW
7
VIN
8
PAD
9
U15
TPS61252
1uH
L1
215k
R86
768k
R83
20.0k
R85
USB 5.0V to regulated 5.0V
0.1uF
C67
GND
JP2
DNP
GND
1000pF
C81
GND GND
GND
OUT
1
NR/FB
2
GND
3
EN
4
NC
5
IN
6
PAD
7
U19
TPS737xxDRV
+1.8V
0.1
R82
TLV803MDBZR
GND
1
RESET
2
VDD
3
U18
1.00k
R93
GND
Green
1
2
D5
LED
GND
GND
USB_VBUSP
GND
GND
GND
GND
GND
USB_VBUS
GND
DNP
GND
DNP
GND
DNP
GND
TPS71718DCKR
IN
1
2
EN
3
NR
4
OUT
5
GND
U17
1000pF
C77
GND
GND
USB_BOOST
10uF
C71
GND
Vout (V)
Programmable LDO Configuration (U13)
3P2V 1P6V 0P8V 0P4V 0P2V 0P1V
1.4
1.5
1.8
2.5
3.0
3.3
4.5
5.0 INSTALLED
INSTALLED INSTALLED INSTALLED
INSTALLED INSTALLED
INSTALLED
INSTALLED
INSTALLED
INSTALLED
DNI = Do not install
DNI
DNI
DNI DNI
DNI
DNI
DNI
DNI
DNI
DNI
DNI
DNI
DNI
DNI
DNI
DNI
DNI
DNI DNI
DNI
DNI
DNI
DNI
DNI
DNI
DNI
DNI
INSTALLED DNI
INSTALLED
INSTALLED
INSTALLED
DNI
DNI
DNI
DNI
INSTALLED
INSTALLED
INSTALLED = install 0 Ohm jumper or short pads together
4.7uF
C68
EXT_5V
Jumper Position DVDD (JP3) AVDD (JP10)
1-2
2-3
USB 5V
EXT 5V
USB 5V
EXT 5V
USB_BOOST
1
2
3
JP3
DNP
1
2
3
JP4
DNP
+5V
USB_REG
+3.3V
USB PWDN
GND GND
22uF
C70
100pF
C69
OUT
1
NC
2
SENSE
3
6P4V2
4
6P4V1
5
3P2V
6
GND
7
1P6V
8
0P8V
9
0P4V
10
0P2V
11
0P1V
12
EN
13
NR
14
IN
15
IN
16
NC
17
NC
18
NC
19
OUT
20
PAD
21
U16
TPS7A4700RGW
0.1uF
C78
GND
5V
Threshold: 4.38V
1uF
C75
1uF
C76
1uF
C79
1uF
C80
100k
R84
VBUS+
DNP
VBUS-
DNP
+5.5V
DNP
DNP
DNP
DNP
1uF
C74
47uF
C73
0
R87
0
R88
DNP
0
R89
DNP
0
R90
0
R91
DNP
0
R92
DNP
0
R94
0
R95
Remove/Install 0
ohm resistors as
need to achieve
desired output
voltage
EVM Bill of Materials, PCB Layouts, and Schematics
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SBAU293 – March 2018
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ADS1261 and ADS1235 Evaluation Module
ADVANCE INFORMATION
Figure 19. ADS1261EVM USB Power Schematic