CS4222-KS datasheet(9/26 Pages) CIRRUS

部件名	CS4222-KS

功能描述	20-Bit Stereo Audio Codec with Volume Control

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制造商	CIRRUS [Cirrus Logic]

网页	http://www.cirrus.com

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FUNCTIONAL DESCRIPTION

Overview

The CS4222 has 2 channels of 20-bit analog-to-

digital conversion and 2 channels of 20-bit

digital-to-analog conversion. All ADCs and

DACs are delta-sigma converters. The DAC out-

p ut s h ave a d ju st ab le o utp ut a tte nua tio n

implemented in 0.5 dB step resolution. The de-

vice also includes a soft mute function and

digital de-emphasis for 32, 44.1, and 48 kHz.

Digital audio data for the DACs and from the

ADCs is communicated over separate serial

ports.

This allows concurrent writing to and

reading from the device. Control for the func-

tions available on the CS4222 are communicated

over a serial microcontroller interface. Figure 1

shows the recommended connection diagram for

the CS4222.

The device can be operated with or without the

control port interface. Additional functions are

available when the control port interface is used

as outlined in Table 1.

Control Port

Stand-alone

Volume control

-

Adjustable Mute ramp rate

Fixed Mute ramp rate

Enable zero crossing detect

Disabled

Disable mute on zero input

Enabled

De-emphasis

Mute DAC outputs

ADC Input Peak Level

Detect

-

16, 18, 20 bit Interface

20 bit I

2S Interface

Individual ADC/DAC power

down

Codec power down

Cal on command

Cal on power-up

High pass enable/disable

High pass enabled

Analog Inputs

Line Level Inputs

AINR-, AINR+, AINL-, and AINL+ are the dif-

ferential line level input pins (See Figure 1).

Figure 2 shows an AC coupled optional input

buffer which combines level shifting with single-

ended to differential conversion. Analog inputs

must be DC coupled into the CS4222 with a

2.3V common mode input voltage. Any DC off-

Figure 2. Optional Line Input Buffer

Table 1. Control Port vs. Stand-alone

CS4222

DS236PP3

9

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Cirrus Logic	CS4222-KS	616Kb / 29P	20-Bit Stereo Audio Codec with Volume Control

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