Datasheet
C26
2.2uF
+3.3VD
TP11
EXTCLK
C43C40
+5VA
C27
2.2uF
C6
0.1uF
C44
C45
R14
100
R15
100
C28
2.2uF
C31
100pF
C30
100pF
C38
MUR_NFM21PC105F1C3D
C39
MUR_NFM21PC105F1C3D
R23
0
R24
0
C7
0.1uF
C29
100pF
C32
100pF
SW7
SW-DPDT
+5VA
+5VA
DOUT
SCLK
SPEED
PDWN
TP13
VREF+
TP14
VREF-
TP9
SCLK
TP10
SPEED
TP12
PWDN
C41 C42
TP15
GND
J4
OST_ED555/4DS
1
2
3
4
5
6
J6
HEADER-6
+5VA
EXC+
EXCSNS+
SIG+
SIG-
EXCSNS-
EXC-
C4
100uF
1
2
J8
R26
20K
R25
20K
+5VA
1
2
J7
TP6
DOUT
J2
CUI-STACK PJ-102BH
VIN
1
VOUT
5
GND
2
NR/ADJUST
4
ENABLE
3
U1
TPS76350DBV
BT1
9V
C8
10uF
D1
C11
0.01uF
C19
10uF
C20
10uF
TP3
+5V
TP4
+3.3VD
+3.3VD
+5V
+5VA
C9
1uF
J5
OST_ED555/2DS
FB/SENSE
1
RESET
2
EN
3
GND
4
IN
5
IN
6
OUT
7
OUT
8
U2
TPS77133DGK
RST
R27
47K
DVDD
1
GND
2
CLKIN
3
SPEED
4
CAP
5
CAP
6
AINP
7
AINN
8
VREFN
9
VREFP
10
GND
11
AVDD
13
PSW
12
PDWN
14
SCLK
15
DRDY/DOUT
16
U6
ADS1231ID
ADS1131ID (GND PIN 3)
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Schematics
A.3 Schematics
Figure 13. ADS1x31REF Schematic—ADC
27
SBAU175A–July 2010–Revised August 2011 Schematic and Layout
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