CS4331 datasheet(19/38 Pages) CIRRUS

19 / 38 page

PIN DESCRIPTIONS

Power Supply Connections

VA+ - Positive Analog Power, PIN 7.

Positive analog supply. Nominally +5V or +3V.

AGND - Analog Ground, PIN 6.

Analog ground reference.

Analog Outputs

AOUTL - Analog Left Channel Output, PIN 8.

Analog output for the left channel. Typically 3.7 Vpp for a full-scale input signal at VA+ = 5V

and 1.85 Vpp at VA+ = 3V.

AOUTR - Analog Right Channel Output, PIN 5.

Analog output for the right channel. Typically 3.7 Vpp for a full-scale input signal at VA+ = 5V

and 1.85 Vpp at VA+ = 3V.

Digital Inputs

MCLK - Master Clock Input, PIN 4.

The frequency must be 256

×, 384× , or 512× the input sample rate (Fs).

LRCK - Left/Right Clock, PIN 3.

This input determines which channel is currently being input on the Audio Serial Data Input

pin, SDATA.

SDATA - Audio Serial Data Input, PIN 1.

Two’s complement MSB-first serial data is input on this pin. The data is clocked into the

CS4330, CS4331, and CS4333 via internal or external SCLK and the channel is determined by

LRCK.

DEM/SCLK - De-emphasis / External serial clock input , PIN 2.

A dual-purpose input used for de-emphasis filter control or external serial clock input.

SERIAL DATA INPUT

SDATA

AOUTL

ANALOG LEFT CHANNEL OUTPUT

DE-EMPHASIS / SCLK

DEM/SCLK

VA+

ANALOG POWER

LEFT / RIGHT CLOCK

LRCK

AGND

ANALOG GROUND

MASTER CLOCK

MCLK

AOUTR

ANALOG RIGHT CHANNEL OUTPUT

CS4330, CS4331, CS4333

DS136F1

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