The CMX649, an adaptive delta modulation (ADM) voice codec, targets consumer and industrial applications such as cordless telephones, cordless headsets, PC speech-to-text applications, digital voice storage, and telematic voice recognition. The device consumes an operational current of 1.9 mA at 2.7V and includes advanced power-saving options to extend battery life. It offers full-duplex ADM, continuously variable slope delta (CVSD) modulation, and PCM (linear, A law, µ law and linear) operating modes. Operating modes and algorithms are user-configurable to select the best data rate and voice quality for each application. One particular CMX649 CVSD mode provides 64 kb/s coding to support Bluetooth-compatible designs. The CMX649 is available in 20-pin plastic SOIC and TSSOP packages and an evaluation kit, the DE6491 Wireless Voice Link Demonstration Kit, is also available. CML MICROCIRCUITS INC., Winston-Salem, NC. (800) 638-5577.
Company: CML MICROCIRCUITS INC.
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