Stereo Codec with Three Digital Audio Interfaces

The WM1811 is a highly integrated ultra-low power hi-fi codec with an integrated stereo Class D speaker driver and Class W headphone driver to minimize power consumption during audio playback. This IC requires only two voltage supplies, with all other internal supply rails generated from integrated LDOs. Stereo full duplex asynchronous sample rate conversion and multichannel digital mixing combined with powerful analog mixing allow the device to support a huge range of different architectures and use cases.

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Portable Codecs

Application Categories

Mobile Audio Devices


  • 24-bit 2-channel hi-fi DAC and 2-channel hi-fi ADC
  • 100 dB SNR during DAC playback ('A' weighted)
  • Smart MIC interface
    • Power, clocking and data input for up to two digital MICs
    • High performance analog MIC interface
    • MIC activity detect & interrupt allows processor to sleep
    • Low power jack detection support
    • Impedance sensing for accessory / push-button detection
  • 2W stereo (2 x 2W) Class D speaker driver
  • Capless Class W headphone drivers
    • Integrated charge pump
    • 5.3mW total power for DAC playback to headphones
  • 4 Line outputs (single-ended or differential)
  • BTL earpiece driver
  • Digital audio interfaces for multi-processor architecture
    • Asynchronous stereo duplex sample rate conversion
    • Powerful mixing and digital loopback functions
  • ReTune™ Mobile 5-band, 4-channel parametric EQ
  • Dynamic range controller
  • Dual FLL provides all necessary clocks
    • Self-clocking modes allow processor to sleep
    • All standard sample rates from 8 kHz to 96 kHz
  • Active noise reduction circuits
    • DC offset correction removes pops and clicks
    • Ground loop noise cancellation
  • Integrated LDO regulators
  • 80-ball W-CSP package (4.158 x 3.876 x 0.607mm)

Parametric Specifications

DACs 2
ADCs 2
Sample Rate (kHz) 8-96
Analog Power Supply (V) 2.4-3.3;
Power Consumption (mW) 5.82-19.15
Package 80 WLCSP



Comprehensive Solutions