CS3302_07 Datasheet, PDF (13/16 Pages) Cirrus Logic – High-Z, Programmable Gain, Differential Amplifier

CS3302
2.4 Connection Diagram
Figure 4 shows a connection diagram for the
CS3302 amplifier when used with the CS5372 dual
∆Σ modulator, the CS4373A test DAC and the
CS5376A digital filter. The diagram shows differ-
ential sensors, a test DAC, and analog outputs with
anti-alias capacitors; power supply connections in-
cluding recommended bypassing; and digital con-
trol connections back to the CS5376A GPIO pins.
3
2
GPIO (x3)
GPIO (x2)
GPIO
GPIO
To CS5376 A
Digital Control
VA+
0.1µF
VA-
0.1µF
Differential
Sensor
Differential
Sensor
VA+
0.1µF
VA-
0.1µF
VA+
GAIN
VA-
MUX
PWDN LPWR
CS3302
Differential
A m p lifier
VD
DGND
VD
0.01µF
VA+
0.1µF
VA+
VD
0.01µF
VD
INA+ INA- GUARD INB- INB+ OUTR- OUTF- OUTF+ OUTR+
0.02µF
C0G
0.02µF
C0G
INR+
INF+
INF-
INR-
MDATA1
MFLAG1
PWDN1
MCLK
MSYNC
CS4373A
Test
DAC
2.5 V
Reference
VREF+
CS5372
∆Σ Modulator
VREF-
INA+ INA- GUARD INB- INB+ OUTR-
VA+
CS3302
Differential
A m p lifier
VA-
OUTF-
0.02µF
C0G
0.02µF
C0G
INR-
INF-
INF+
INR+
OUTF+ OUTR+
VD
VD
VA-
0.01µF
VA-
DGND
0.1µF
LPWR
OFST
MDATA2
MFLAG2
PWDN2
DGND
GAIN
MUX
PWDN LPWR
2
3
GPIO
GPIO
GPIO (x2)
GPIO (x3)
To CS5376A
Digital Control
Figure 4. CS3302 Amplifier Connections
DS596F3
13