CS3302A
DS765PP1
CS3302A
2.4
Connection Diagram
Figure 5 shows a connection diagram for the CS3302A amplifier when used with the CS5372A dual ∆Σ
modulator, the CS4373A test DAC and the CS5376A digital filter. The diagram shows differential sensors,
a test DAC, and analog outputs with anti-alias capacitors; power supply connections including recom-
mended bypassing; and digital control connections back to the CS5376A GPIO pins.
GPIO (x3)
GPIO (x2)
GPIO
3
To CS5376A
Digital Control
2
A
GAIN
MUX
PWDN
VA+
VD
VA+
VD
VA+
VA-
VD
µF
µF
0.01
0.1
µF
0.1
CS3302A
Differential
Amplifier
µF
0.01
VA-
VA+
VD
GND
µF
0.1
INA+ INA- GUARD INB- INB+ OUTR- OUTF- OUTF+ OUTR+
MDATA1
MFLAG1
PWDN1
680 Ω
680 Ω
INR+
INF+
µF
0.02
C0G
0.02µF
C0G
680 Ω
INF-
INR-
Differential
Sensor
MCLK
MSYNC
680 Ω
VREF+
CS4373A
Test
DAC
2.5 V
Reference
CS5372A
∆Σ Modulator
VREF-
Differential
Sensor
LPWR
OFST
Ω
680
INR-
INF-
680 Ω
680 Ω
µF
C0G
µF
0.02
C0G
0.02
INF+
INR+
MDATA2
MFLAG2
PWDN2
680 Ω
INA+ INA- GUARD INB- INB+ OUTR- OUTF- OUTF+ OUTR+
VA+
VD
VA+
VD
VA-
GND
µF
0.1
CS3302A
Differential
Amplifier
µF
0.01
VA-
VA-
µF
0.1
VA-
GND
µF
0.1
GAIN
MUX
PWDN
A
To CS5376A
Digital Control
GPIO
GPIO (x2)
GPIO (x3)
2
3
Figure 5. CS3302A Amplifier Connections
DS765PP1
13
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