Datenblatt-Suchmaschine für elektronische Bauteile |
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LA8638V Datenblatt(PDF) 1 Page - Sanyo Semicon Device |
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LA8638V Datenblatt(HTML) 1 Page - Sanyo Semicon Device |
1 / 16 page 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. Functions • Transmitter circuits: compressor, microphone amplifier, limiter (IDC), muting, output level changes to user- specified 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 speaker with a load of 2 k Ω • 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 Monolithic Linear IC 40398RM (OT) No. 5776-1/16 SANYO: SSOP30 [LA8638V] SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN Low-voltage Compander IC for Cordless Telephones LA8638V Ordering number : EN5776 Parameter Symbol Conditions Ratings Unit Maximum power supply voltage VCC max 7.0 V Maximum power dissipation Pd max Ta ≤ 75°C 100 mW Operating temperature Topr –20 to +75 °C Storage temperature Tstg –40 to +125 °C Specifications Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit Recommended power supply voltage VCC 2.4 V Operating power supply voltage range VCCop 1.8 to 5.5 V Operating Conditions at Ta = 25°C |
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