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8-Pin, Stereo A/D Converter for Digital Audio

Features

 Single +5 V Power Supply

 18-Bit Resolution

 94 dB Dynamic Range

 Linear Phase Digital Anti-Alias Filtering

– 0.05 dB Passband Ripple

– 80 dB Stopband Rejection

 Low Power Dissipation: 150 mW

– Power-Down Mode for Portable

Applications

 Complete CMOS Stereo A/D System

– Delta-Sigma A/D Converters

– Digital Anti-Alias Filtering

– S/H Circuitry and Voltage Reference

 Adjustable System Sampling Rates including

32, 44.1, and 48 kHz

General Description

The CS5330A/31A is a complete stereo analog-to-digi-

tal converter that performs antialias filtering, sampling

and analog-to-digital conversion generating 18-bit val-

ues for both left and right inputs in serial form. The

output sample rate can be infinitely adjusted between

2 kHz and 50 kHz.

The CS5330A/31A operates from a single +5 V supply

and requires only 150 mW for normal operation, making

it ideal for battery-powered applications.

The ADC uses delta-sigma modulation with 128X over-

sampling, followed by digital filtering and decimation,

which removes the need for an external anti-alias filter.

The linear-phase digital filter has a passband to

21.7 kHz, 0.05 dB passband ripple and >80 dB stop-

band rejection. The device also contains a high-pass fil-

ter to remove DC offsets.

The device is available in an 8-pin SOIC package in

both Commercial (

-10° to +70° C) and Automotive grades

(-40° to +85° C)

. Please refer to “Ordering Information” on

page 16 for complete details.

High

Pass

Filter

AINR

S/H

AGND

AINL

S/H

DAC

Serial Output Interface

Voltage Reference

Comparator

LP Filter

VA+

SCLK

Digital Decimation

Filter

SDATA

MCLK

DAC

High

Pass

Filter

LRCK

423

Digital Decimation

Filter

MAY '11

DS138F6

CS5330A/31A

1 2 3 4 5 6 ... 15 16

Sommario

Pagina 1 - CS5330A/31A

Pagina 2

10 DS138F6CS5330A/31A3.1.4 Slave ModeLRCK and SCLK become inputs in SLAVE mode. LRCK must be externally derived from MCLK and beequal to Fs. The frequ

Pagina 3 - 1. PIN DESCRIPTIONS

DS138F6 11CS5330A/31A3.1.7 Analog ConnectionsFigure 1 shows the analog input connections. The analog inputs are presented to the modulators via theAIN

Pagina 4 - ABSOLUTE MAXIMUM RATINGS

12 DS138F6CS5330A/31A The CS5330A and CS5331A have a Power-Down mode wherein typical consumption drops to 0.5 mW.This is initiated when a loss of cloc

Pagina 5 - ANALOG INPUT CHARACTERISTICS

DS138F6 13CS5330A/31A3.1.11 Digital FilterFigures 5 through 8 show the attenuation characteristics of the digital filter included in the ADC. The filt

Pagina 6 - DIGITAL CHARACTERISTICS

14 DS138F6CS5330A/31A4. PARAMETER DEFINITIONSResolutionThe total number of possible output codes is equal to 2 N, where N = the number of bits in the

Pagina 7 - SWITCHING CHARACTERISTICS

DS138F6 15CS5330A/31A5. REFERENCES1. Area Efficient Decimation Filter for an 18-Bit Delta- Sigma ADC, by K. Lin and J. J. Paulos. Paper presentedat th

Pagina 8

16 DS138F6CS5330A/31A7. ORDERING INFORMATION 8. REVISION HISTORYProduct Description Package Pb-Free Grade Temp Range Container Order #CS5330A8-pin, St

Pagina 9 - 3. GENERAL DESCRIPTION

2 DS138F6CS5330A/31ATABLE OF CONTENTS1. PIN DESCRIPTIONS ...

Pagina 10

DS138F6 3CS5330A/31A1. PIN DESCRIPTIONSPin Name#Pin DescriptionSDATA1Audio Serial Data Output (Output) - Two’s complement MSB-first serial data is out

Pagina 11

4 DS138F6CS5330A/31A2. CHARACTERISTICS AND SPECIFICATIONS(All Min/Max characteristics and specifications are guaranteed over the Specified Operating C

Pagina 12

DS138F6 5CS5330A/31AANALOG INPUT CHARACTERISTICS(-1 dBFS input sine wave, 997 Hz; Measurement Bandwidth is 10 Hz to 20 kHz unless otherwise specified;

Pagina 13

6 DS138F6CS5330A/31ADIGITAL CHARACTERISTICS DIGITAL FILTER CHARACTERISTICS (FS = 48 kHz)6. Filter characteristics scale with output sample rate.7

Pagina 14 - 4. PARAMETER DEFINITIONS

DS138F6 7CS5330A/31ASWITCHING CHARACTERISTICS(Inputs: Logic 0 = 0V, Logic 1 = VA+; CL = 20 pF) Switching characteristics are guaranteed by characteriz

Pagina 15 - 6. PACKAGE DESCRIPTIONS

8 DS138F6CS5330A/31A SCLK outputSDATAtsdoLRCK outputtmslrSCLK to SDATA LRCK - MASTER mode (CS5330A)SCLK outputtmslrSDATAtsdoLRCK outputSCL

Pagina 16 - 8. REVISION HISTORY

DS138F6 9CS5330A/31A3. GENERAL DESCRIPTIONThe CS5330A and CS5331A are 18-bit, 2-channel Analog-to-Digital Converters designed for digital audio applic

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