ST5090

LOW VOLTAGE 14-BIT LINEAR CODEC

WITH HIGH-PERFORMANCE AUDIO FRONT-END

FEATURES:

Complete CODEC and FILTER system including:

14 BIT LINEAR ANALOG TO DIGITAL AND

DIGITAL TO ANALOG CONVERTERS.

8 BIT COMPANDED ANALOG TO DIGITAL

AND DIGITAL TO ANALOG CONVERTERS

A-LAW OR

µ-LAW.

TRANSMIT AND RECEIVE BAND-PASS FILTERS

ACTIVE ANTIALIAS NOISE FILTER.

Phone Features:

THREE SWITCHABLE MICROPHONE AM-

PLIFIER INPUTS. GAIN PROGRAMMABLE:

20 dB PREAMP. (+MUTE), 0 . . 22.5 dB AM-

PLIFIER, 1.5 dB STEPS.

EARPIECE AUDIO OUTPUT. ATTENUATION

PROGRAMMABLE: 0 . . 30 dB, 2 dB STEPS.

EXTERNAL AUDIO OUTPUT. ATTENUATION

PROGRAMMABLE: 0 . . 30 dB, 2 dB STEPS.

TRANSIENT SUPRESSION SIGNAL DURING

POWER

ON

AND

DURING

AMPLIFIER

SWITCHING.

INTERNAL

PROGRAMMABLE

SIDETONE

CIRCUIT. ATTENUATION PROGRAMMABLE:

16 dB RANGE, 1 dB STEP. ROUTING POSSI-

BLE TO BOTH OUTPUTS.

INTERNAL RING OR TONE GENERATOR IN-

CLUDING DTMF TONES, SINEWAVE OR

SQUAREWAVE

WAVEFORMS.

ATTENU-

ATION PROGRAMMABLE: 27dB RANGE,

3dB STEP. THREE FREQUENCY RANGES:

a) 3.9Hz . . . . 996Hz, 3.9Hz STEP

b) 7.8Hz . . . . 1992Hz, 7.8Hz STEP

c) 15.6Hz . . . . 3984Hz, 15.6Hz STEP

PROGRAMMABLE PULSE WIDTH MODU-

LATED BUZZER DRIVER OUTPUT.

General Features:

SINGLE 3.3V

±10% OR 5V ±10% SUPPLY

SELECTABLE.

EXTENDED TEMPERATURE RANGE OPERA-

TION (*) -40

°Cto 85°C.

1.5

µW STANDBY POWER (TYP. AT 3V).

21 mW OPERATING POWER (TYP. AT 3V).

CMOS COMPATIBLE DIGITAL INTERFACES.

PROGRAMMABLE PCM AND CONTROL IN-

TERFACE MICROWIRE COMPATIBLE.

APPLICATIONS:

GSM DIGITAL CELLULAR TELEPHONES.

CT2 DIGITAL CORDLESS TELEPHONES.

DECT DIGITAL CORDLESS TELEPHONES.

BATTERY OPERATED AUDIO FRONT-ENDS

FOR DSPs.

(*) Functionality guaranteed in the range – 40

°C to +85°C;

Timing and Electrical Specifications are guaranteed in the range

–30

°C to +85°C.

GENERAL DESCRIPTION

ST5090 is a high performance low power combined

PCM CODEC/FILTER device tailored to implement

the audio front-end functions required by the next

generation low voltage/low power consumption

digital terminals.

ST5090 offers a number of programmable func-

tions accessed through a serial control channel that

easily interfaces to any classical microcontroller.

The PCM interface supports both non-delayed (nor-

mal and reverse) and delayed frame synchroniza-

tion modes.

ST5090 can be configurated either as a 14-bit lin-

ear or as an 8-bit companded PCM coder.

Additionally

to

the

CODEC/FILTER

function,

ST5090 includes a Tone/Ring/DTMF generator, a

sidetone generation, and a buzzer driver output.

ST5090 fulfills and exceeds D3/D4 and CCITT rec-

ommendations and ETSI requirements for digital

handset terminals.

Main applications include digital mobile phones, as

cellular and cordless phones, or any battery pow-

ered equipment that requires audio codecs operat-

ing at low single supply voltages

This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

February 1996

TQFP44(10x10x1.4)

SO28

ORDERING NUMBERS:

Package

Dim.

Cond.

ST5090AD

ST5090ADTR

ST5090TQFP

ST5090TQFPTR

SO28

SO28

TQFP44

TQFP44

10x10x1.4

10x10x1.4

Tube

Tape&Reel

Tray 8x20

Tape&Reel

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