CS3302A Datasheet, PDF (13/16 Pages) Cirrus Logic – High-Z, Programmable Gain, Differential Amplifier

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.
VA+
0.1 µF
VA-
0.1 µF
Differential
Sensor
Differential
Sensor
VA+
0.1µF
VA-
0.1 µF
3
2
GPIO (x3)
GPIO (x2)
GPIO
To CS5376A
Digital Control
VA+
GAIN
VA-
MUX
PWDN
CS3302A
Differential
Amplifier
VD
GND
VD
0.01µF
VA+
0.1 µF
VA+
A
VD
0.01 µF
VD
INA+ INA-
GUARD INB- INB+ OUTR-
OUTF-
OUTF+ OUTR+
680 Ω
680 Ω
680 Ω
0.02µF
C0G
680 Ω
0.02 µF
C0G
INR+
INF+
INF-
INR-
MDATA1
MFLAG1
PWDN1
MCLK
MSYNC
CS4373A
Test
DAC
2.5 V
Reference
VREF+
CS5372A
∆Σ Modulator
VREF-
INA+ INA-
VA+
VA-
GUARD INB- INB+ OUTR-
CS3302A
Differential
Amplifier
OUTF-
680 Ω
680 Ω
680 Ω
0.02µF
C0G
0.02 µF
C0G
680 Ω
OUTF+ OUTR+
VD
VD
INR-
INF-
INF+
INR+
VA-
0.01µF
VA-
GND
0.1µF
LPWR
OFST
MDATA2
MFLAG2
PWDN2
GND
GAIN
MUX
PWDN
A
2
3
GPIO
GPIO (x2)
GPIO (x3)
To CS5376A
Digital Control
Figure 5. CS3302A Amplifier Connections
DS765PP1
13