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MSM7586-xx - pie/4 Shift QPSK MODEM/ADPCM CODEC

General Description

The MSM7586 is a CMOS IC developed for use with digital cordless telephones.

The device provides a p/4 shift QPSK modem function and a CODEC function which performs transcoding between the voice band analog signal and 32 kbps ADPCM data.

Key Features

  • (p/4 Shift QPSK Modem Unit).
  • 384 kbps transmission speed.
  • Built-in root Nyquist digital filter for the baseband band limiter.
  • Built-in D/A converters for the analog outputs of the quadrature signal component I and Q.
  • The DC offset and gain can be adjusted with respect to the differential I and Q analog outputs.
  • Completely digitized p/4 shift QPSK demodulator system (ADPCM CODEC Unit).
  • ADPCM system: built-in ITU-T Recommendations G.726 (32kbps.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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E2U0034-28-82 ¡ Semiconductor MSM7586-01/03 ¡ Semiconductor p/4 Shift QPSK MODEM/ADPCM CODEC This version: Aug. 1998 MSM7586-01/03 Previous version: Nov. 1996 GENERAL DESCRIPTION The MSM7586 is a CMOS IC developed for use with digital cordless telephones. The device provides a p/4 shift QPSK modem function and a CODEC function which performs transcoding between the voice band analog signal and 32 kbps ADPCM data. The MSM7586 performs DTMF tone and several types of tone generation, transmit/receive data, mute and gain control, side-tone pass and its gain control, and VOX function.