DA9090B.001

January 14, 1998

1

MAS9090B

LOW VOLTAGE 14-BIT LINEAR CODEC

• 14-bit linear analog to digital and digital to analog converters

• 8-bit A-law or µ-law companded analog to digital and digital to

analog converters

DESCRIPTION

The MAS9090 is a high performance low power PCM CODEC and filter device tailored to implement the audio

front-end functions required by the low voltage/low power consumption digital terminals.

FEATURES

APPLICATIONS

•

Single 2.7-3.6 V or 4.5-5.5 V supply selectable

•

-30

°C to 85°C temperature operation range

•

11 mW operating power (typ. at 2.7V)

•

15 mW operating power (typ. at 3.0V)

•

27 mW operating power (typ. at 3.6V)

•

38 mW operating power (typ. at 5.0V)

•

Digital bandpass filters

•

±0.5 dB absolute gain accuracy (untrimmed)

•

28-pin SO and 44-pin TQFP packages

•

Pin compatible with ST5090 and ST5092

•

GSM digital cellular telephones

•

Battery operated audio front-ends for DSPs

•

ISDN Terminals

•

CT2 and DECT digital cordless telephones

BLOCK DIAGRAM

Compressor

TX

Register

Bandpass

Filter

MUX

MUX

Expander

RX

Register

Bandpass

Filter

Ring/Tone/DTMF

Generator

+

Buzzer Control

Serial

Control

Interface

PreAmp

TX

Gain

Sidetone

Gain

Tone

Gain

Buffer

Amplifiers

Clock

Generator

MIC3-

MIC2-

MIC1-

MIC3+

MIC2+

MIC1+

BZ

SP1-

SP1+

SP2+

SP2-

TX

RX

MCLK

FS

CO

CI

CS

CCLK

LO

RX Gain

(SP1/SP2)

1

3

2

4

EN

EN

PCM

D to A

Converter

3

+

+

+

-12.5...-27.5 dB

1 dB step

SI

RTE

0...-30 dB

2 dB step

SE

OE1

OE2

TE

VS

PCM

A to D

Converter

1

DE

0...-27 dB

3 dB step

0...22.5 dB

1.5 dB step

BE