
VA+ VD+
VREF+
VREF-
AIN1+
CS5504
20 bits
AIN1-
A0
VA- DGND
SCLK
SDATA
CONV
CAL
XIN
3
2
6
2
3
4
6
LT1007
4
3
2
20
14
17
CS
DRDY
116
10
15
8
7
2k
2k
1k
2mV/V
Transducer
+10
4
100
0.005
100
7
+10
+10
3
4
5
6
2
7
0.1
10
+
MIC4428
or
MIC4425
+10V
17.8k
10k
≈
3.6V
0.47
0.1
AIN2+
AIN2-
19
18
330 kHz
OSC
11
9
13
12
7
5
350
+
-
350
350350
100pF
System
Microcontroller
49.9k
49.9k
Gain
Trim
1k
200
0.005
0.005
604
≈
3.33V
0.01
0.01
BP/UP
40 Conversions/sec
before averaging
5 Volt
Regulator
Figure 11. Switched Bridge with CS5504 Using +10 Volt Analog Supply
Bridge Transducer Digitizer Circuits
AN31REV3 15
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