CS3302 Datasheet, PDF (13/15 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 and CS5376A digital filter. The dia-
gram shows differential sensors, a test DAC, and
analog outputs with anti-alias capacitors; power
supply connections including recommended by-
passing; and digital control connections back to the
CS5376A GPIO pins.
3
2
GPIO (x3)
GPIO (x2)
GPIO
GPIO
To CS5376 A
Digital Control
VA+
0 .1 µ F
VA-
0 .1 µ F
D ifferential
Sensor
D ifferential
Sensor
VA+
0 .1 µ F
VA-
0 .1 µ F
VA+
G A IN
VA-
MUX
PWDN LPWR
CS3302
Differential
Am plifier
VD
DGND
VD
0.0 1 µ F
VA+
0 .1 µ F
VA+
VD
0 .0 1µ F
VD
INA+ INA- GUARD INB- INB+ O UTR- OUTF- OUTF+ O UTR+
0 .0 2µ F
C 0G
0.0 2 µ F
C0G
INR+
INF+
INF-
INR-
M DATA1
MFLAG1
PW DN1
MCLK
MSYNC
CS4373
Test
DAC
2.5 V
Reference
VREF+
CS5372
∆Σ Modulator
VREF-
INA+ INA- G UARD INB- INB+ O UTR-
VA+
CS3302
Differential
Am plifier
VA-
OUTF-
0 .0 2µ F
C 0G
0.0 2 µ F
C0G
INR-
INF-
INF+
INR+
OUTF+ OUTR+
VD
VD
VA-
0.0 1 µ F
VA-
DGND
0.1µF
LPWR
OFST
M DATA2
MFLAG2
PW DN2
DGND
G AIN
M UX
PWDN LPWR
2
3
GPIO
GPIO
GPIO (x2)
GPIO (x3)
To CS5376A
Digital Control
Figure 4. CS3302 Amplifier Connections
13