Cirrus-logic CS3302A Instrukcja Użytkownika Pobierz pdf (Strona 13)

CS3302A

DS765PP1

DS765PP1 13

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.

CS5372A

∆Σ Modulator

0.02µF

C0G

0.02

C0G

0.02

C0G

0.02

C0G

INF+

INR+

INF-

INR-

INF-

INR-

INF+

INR+

VREF+

VREF-

VA+

VA-

GND

MDATA1

MFLAG1

MDATA2

MFLAG2

MCLK

MSYNC

PWDN1

OFST

PWDN2

LPWR

CS3302A

Differential

Amplifier

INB+INA+ INA- INB- OUTF-OUTR- OUTF+ OUTR+

VA+

VA-

GND

GAIN MUX PWDN

CS3302A

Differential

Amplifier

INB+INA+ INA- INB- OUTF-OUTR- OUTF+ OUTR+

VA+

VA-

GND

GAIN MUX PWDN

VA-

0.1

VA+

0.1

VA-

0.1

VA+

0.1

0.01

GPIO

GPIO (x2)

GPIO (x3)

GPIO

GPIO (x2)

GPIO (x3)

Differential

Sensor

Differential

Sensor

Test

DAC

To CS5376A

Digital Control

To CS5376A

Digital Control

2.5 V

Reference

VA+

0.1 0.01

VA-

0.1

GUARD

CS4373A

680

µF

µF µF

µF

µF µF

µF

Ω

Figure 5. CS3302A Amplifier Connections

1 2 ... 8 9 10 11 12 13 14 15 16

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