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Figure 52. STPMS2L and PT100 schematic diagram
21
25
STPMS2&PT100
MB1144
B-02
6/24/2015
Title:
Size:
Reference:
Date:
Sheet:
of
A3
Revision:
STM32L476G-EVAL
Project:
STPMS2 power metering
R26
1K
GND
GND
GND
GND
C26
100nF
GND
GND
R27
1K
GND
R+jX Load
current
shunt
external generator input: pins 1 and 3
voltage of complex load: pins 2 and 3
shunt voltage : pins 1 and 2
R31
100 1%
GND
GND
GND
GND
C25
100nF
GND
GND
VC
C
1
VD
DAC
2
VD
DA
3
VB
G
4
DATn
16
DAT
15
CLK
14
MS3
13
MS
2
12
MS
1
11
MS
0
10
VD
DAV
9
VIP
8
VIN
7
CIP
6
CIN
5
GN
D
17
A
V
Exposed
pad GND
U4
STPMS2L-PUR
GND
current
shunt
PT100 measurement using SigmaDelta STPMS2
R29
3K3
VDD
VDD
VDD
PC2
PD3
PC7
DFSDM_CKOUT
DFSDM_DATIN1
R23
0
R24
0
PT100_DATIN
VC
C
1
VD
DAC
2
VD
DA
3
VB
G
4
DATn
16
DAT
15
CLK
14
MS3
13
MS
2
12
MS
1
11
MS
0
10
VD
DAV
9
VIP
8
VIN
7
CIP
6
CIN
5
GN
D
17
A
V
Exposed
pad GND
U3
STPMS2L-PUR
3
2
1
CN4
GND
C2
9
4.7uF
C27
1uF
C2
2
1uF
C24
1uF
C28
1uF
C2
1
1uF
C23
1uF
Operating range: 3.2<VDD<3.6V
R30
PT100