SA5752

RF COMMUNICATIONS PRODUCTS SA5752 Audio processor – companding, VOX and amplifier section Product Specification Replaces data of December 6, 1993 IC17 Data Handbook 1997 Nov 07 Philips Semiconductors Philips Semiconductors Product specification Audio processor – companding, VOX and amplifier section SA5752 DESCRIPTION The SA5752 is a high performance low power audio signal processing system especially designed to meet the requirements for small size and low voltage operation of hand-held equipment. The SA5752 subsystem includes a low noise microphone preamplifier with adustable gain, a noise cancellation switching amplifier with adjustable threshold, a voice operated transmitter (VOX) switch, VOX control, an audio compressor with buffered input, audio expandor, and an internal bandgap voltage regulator with power down capability. When used with Philips Semiconductors’ SA5753, the complete audio processing function of an AMPS or TACS cellular telephone is easily implemented. The system also meets the requirements of the proposed NAMPS or NTACS specifications. The SA5752 can also be used without the SA5753 in a wide variety of radio communications applications. PIN CONFIGURATION DK PACKAGE MICIN 1 20 NCAN OUT 19 COMPIN 18 COMPCAP3 17 COMPCAP1 16 COMPOUT PREAMPGRES 2 RECTGRES 3 NCANCAP 4 VOXOUT VOXTR GND VREF VCC 5 6 7 8 9 SA5752 15 COMPCAP2 14 VOXCTL 13 HPDN 12 EXPIN 11 EXPOUT FEATURES Operating voltage range: 2V to 5.5V Miniature SSOP High performance Adju...