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STW5093 データシート

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GENERAL DESCRIPTION
STw5093 is a high performance low power combined PCM CODEC/FILTER device tailored to implement the audio front-end functions required by low voltage/low power consumption digital cellular terminals. STw5093 offers a number of programmable functions accessed through a serial control channel that easily interfaces to any classical microcontroller. The PCM interface supports both non-delayed (normal and reverse) and delayed frame synchronization modes.
STw5093 can be configurated either as a 14-bit linear or as an 8-bit companded PCM coder.

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 ALAW OR µ-LAW.
■ TRANSMIT AND RECEIVE BAND-PASS FILTERS
■ ACTIVE ANTIALIAS NOISE FILTER.

Phone Features:
■ ONE MICROPHONE BIASING OUTPUT
■ REMOTE CONTROL (REMOCON) FUNCTION
■ THREE SWITCHABLE MICROPHONE AMPLIFIER INPUTS. GAIN PROGRAMMABLE:0 . . 42.5 dB AMPLIFIER, 1.5 dB STEPS (+ MUTE).
■ EARPIECE AUDIO OUTPUT. ATTENUATION PROGRAMMABLE: 0 . . 30 dB, 2 dB STEPS.
■ EXTERNAL AUDIO OUTPUT. ATTENUATION PROGRAMMABLE: 0 . . 30 dB, 2 dB STEPS.
■ DRIVING CAPABILITY: 140mW OVER 8Ω
■ TRANSIENT SUPRESSION SIGNAL DURING POWER ON AND DURING AMPLIFIER SWITCHING.
■ INTERNAL PROGRAMMABLE SIDETONE CIRCUIT. ATTENUATION PROGRAMMABLE: 16 dB RANGE, 1 dB STEP.
■ INTERNAL RING, TONE AND DTMF GENERATOR, SINEWAVE OR SQUAREWAVE WAVEFORMS. ATTENUATION 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 MODULATED BUZZER DRIVER OUTPUT.

General Features:
■ SINGLE 2.7V to 3.3V SUPPLY
■ EXTENDED TEMPERATURE RANGE OPERATION (*) -40°C to 85°C.
■ 1.0µW STANDBY POWER (TYP. AT 2.7V).
■ 13mW OPERATING POWER (TYP. AT 2.7V).
■ 1.8V TO 3.3V CMOS COMPATIBLE DIGITAL INTERFACES.
■ PROGRAMMABLE PCM AND CONTROL INTERFACE MICROWIRE COMPATIBLE. APPLICATIONS:
■ GSM/DCS1800/PCS1900/JDC DIGITAL CELLULAR TELEPHONES.
■ CDMA CELLULAR TELEPHONES.
■ DECT/CT2/PHS DIGITAL CORDLESS TELEPHONES.
■ BATTERY OPERATED AUDIO FRONT-ENDS FOR DSPs.

 

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