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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 AMPLIFIER INPUTS. GAIN PROGRAMMABLE: 20 dB PREAMP. (+MUTE), 0 . . 22.5 dB AMPLIFIER, 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.