ST STEVAL-STWINBX1 - Figure 38. Core System Board Circuit Schematic (5 of 8)

Figure 38. Core system board circuit schematic (5 of 8)
PE9
PE10
PC1
PC0
PA4
3V3_S e ns ors
2V75A
2V75A
HP Filter --> fc = 15.9 Hz
LP Filter --> fc = 99.4 KHz
DAC for mic bias
2V75A
2V75A
ADF1_S DIO
ADF1_CCK0
ADC1_IN1
DAC1_OUT1ADC1_IN2
C2
100nF
TP 12
R5
100k
R8
1M
R7
1M
S B10 NU
R6 4.7k
C8
10nF
S B11
0R
C46
10nF
C43
100nF
C47
1uF
R24
10k
M1
1
DOUT
IMP23ABSUTR
2
GND1
3
GND2
VDD
5
4
GND3
C9
100nF
C44
1uF
M2
4
DOUT
IMP34DT05TR
LR
2
5
GND
VDD
1
CLK
3
6
GND
GND
7
8
GND
U8
1
TS V912IQ2T
OUT1
2
IN1-
3
IN1+
5
IN2+
4
VCC-
6
IN2-
7
OUT2
8
VCC+
EXP
9
R25 160
C24
1uF
MREF
M1
M1P _FILT
MREF
M1P _FILT
MREF
M1P
MREF_DIV
UM2965 - Rev 1
page 39/58
UM2965
Schematic diagrams