100/90 dB Stereo Codec

The WM8734 is a low power stereo codec featuring stereo line inputs, along with a mute function and programmable line level volume control. Stereo 24-bit multi-bit Delta Sigma ADCs and DACs are used with oversampling digital interpolation and decimation filters. Digital audio input word lengths from 16-32 bits and sampling rates from 8 kHz to 96 kHz are supported. Stereo audio line level outputs are provided along with anti-thump mute and power up/down circuitry. The device is controlled via a two- or three- wire serial interface. The interface provides access to all features including level controls, mutes, de-emphasis and power management facilities.

Technology

Mono/Stereo Codecs

Features

  • Audio performance
    • 90 dB SNR (‘A’ weighted @ 48 kHz) ADC
    • 100 dB SNR (‘A’ weighted @ 48 kHz) DAC
    • 2.7 - 3.6 V digital supply operation
    • 2.7 - 3.6 V analog supply operation
  • ADC and DAC sampling frequency: 8 kHz - 96 kHz
  • Selectable ADC high pass filter
  • 2 or three-wire MPU serial control interface
  • Programmable audio data interface modes
    • I²S, left, right justified or DSP
    • 6/20/24/32 bit word lengths
    • Master or slave clocking mode
  • Stereo audio inputs and outputs
  • 20-lead SSOP package

Parametric Specifications

Channels In 2
Channels Out 2
DAC THD+N (dB) -86
ADC THD+N (dB) -84
Analog Power Supply (V) 2.7-3.6
Supply Current (µA) 2.7-3.6
Package 20 SSOP

Technical Documents

WM8734 Product Datasheet

Aug 1, 2013, v4.4 : 447 Kb

WM8734-EV1M Evaluation Board User Handbook

Jul 1, 2003, v1.1 : 923 Kb

WM8734-EV2M Evaluation Board User Handbook

Jul 1, 2003, v1.1 : 1200 Kb

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Comprehensive Solutions