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LA8638V

Sanyo
Part Number LA8638V
Manufacturer Sanyo
Description Low-voltage Compander IC
Published Apr 25, 2005
Detailed Description Ordering number : EN5776 Monolithic Linear IC LA8638V Low-voltage Compander IC for Cordless Telephones Overview The L...
Datasheet PDF File LA8638V PDF File

LA8638V
LA8638V

Overview
Ordering number : EN5776 Monolithic Linear IC LA8638V Low-voltage Compander IC for Cordless Telephones Overview The LA8638V provides dynamic range expansion, noise suppression for enhancing the quality of audio signals in cordless telephones and other communications systems.
This single chip provides the functions that make it ideal for cordless telephones: a compressor with a logarithmic compression ratio of 1/2, expander with a logarithmic expansion ratio of 2, splatter filter, microphone amplifier, BTL amplifier, waveform shaper for the receiving signal, muting for both receiving and transmitting signals, and standby operation.
speaker with a load of 2 kΩ • Standby operation that conserves battery power during intermittent reception by disabling all but the waveform shaper for the receiving signal • Built-in splatter filter with user-specified fc • Low-voltage operation (1.
8 V to 5.
5 V) Package Dimensions unit: mm 3191-SSOP30 [LA8638V] Functions • Transmitter circuits: compressor, microphone amplifier, limiter (IDC), muting, output level changes to userspecified levels, and splatter filter • Receiver circuits: expander, buffer amplifier for filters, muting, output level changes to user-specified levels, and BTL amplifier • Other circuits: waveform shaper for the receiving signal and standby operation Features • Full processing of baseband signals for both receiving and transmitting signals • Built-in BTL receiver amplifier for driving a ceramic SANYO: SSOP30 Specifications Maximum Ratings at Ta = 25°C Parameter Maximum power supply voltage Maximum power dissipation Operating temperature Storage temperature Symbol VCC max Pd max Topr Tstg Ta ≤ 75°C Conditions Ratings 7.
0 100 –20 to +75 –40 to +125 Unit V mW °C °C Operating Conditions at Ta = 25°C Parameter Recommended power supply voltage Operating power supply voltage range Symbol VCC VCCop Conditions Ratings 2.
4 1.
8 to 5.
5 Unit V V SANYO Electric Co.
,Ltd.
Semiconductor Bussiness Headquarters TOKYO OFFI...


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