Low Power Codec with Headphone Driver

The WM8988 is a low power, high quality stereo codec with complete integration of interfaces to 2 stereo headphone or line out ports. Advanced on-chip digital signal processing performs graphic equaliser, 3-D sound enhancement and automatic level control for the microphone or line input. The WM8988 can operate as a main or a secondary, with various main clock frequencies including 12 or 24 MHz for USB devices, or standard 256 fs rates like 12.288 MHz and 24.576 MHz. Different audio sample rates such as 96 kHz, 48 kHz, 44.1 kHz are generated directly from the main clock without the need for an external PLL.

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Features

  • DAC SNR 100 dB (‘A’ weighted), THD –90 dB at 48 kHz, 3.3V
  • ADC SNR 93 dB (‘A’ weighted), THD -81 dB at 48 kHz, 3.3V
  • Programmable ALC / noise gate
  • 2x on-chip headphone drivers
    • >40 mW output power on 16ohm / 3.3V
    • THD –80 dB at 20mW, SNR 90 dB with 16ohm load
  • Digital graphic equalizer
  • Low power
    • 7 mW stereo playback (1.8V / 1.5V supplies)
    • 14 mW record and playback (1.8V / 1.5V supplies)
  • Low supply voltages
    • Analog 1.8V to 3.6V
    • Digital core: 1.42V to 3.6V
    • Digital I/O: 1.8V to 3.6V
  • 256 fs / 384fs or USB main clock rates: 12 MHz, 24 MHz
  • Audio sample rates: 8, 11.025, 16, 22.05, 24, 32, 44.1, 48, 88.2, 96 kHz generated internally from main clock
  • 4x4mm COL package

Parametric Specifications

DACs 2
ADCs 2
DAC THD+N (dB) -88
ADC THD+N (dB) -75
Sample Rate (kHz) 96
Analog Power Supply (V) 1.8-3.6
Power Consumption (mW) 11.3-27.5
Package 28 QFN

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