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WM8903

Wolfson Microelectronics
Part Number WM8903
Manufacturer Wolfson Microelectronics
Description Ultra Low Power CODEC
Published May 27, 2016
Detailed Description w WM8903 Ultra Low Power CODEC for Portable Audio Applications DESCRIPTION The WM8903 is a high performance ultra-low...
Datasheet PDF File WM8903 PDF File

WM8903
WM8903

Overview
w WM8903 Ultra Low Power CODEC for Portable Audio Applications DESCRIPTION The WM8903 is a high performance ultra-low power stereo CODEC optimised for portable audio applications.
The device features stereo ground-referenced headphone amplifiers using the Wolfson ‘Class W’ amplifier techniques incorporating an innovative dual-mode charge pump architecture - to optimise efficiency and power consumption during playback.
The ground-referenced outputs eliminate headphone coupling capacitors.
Both headphone and line outputs include common mode feedback paths to reject ground noise.
Control sequences for audio path setup can be pre-loaded and executed by an integrated sequencer to reduce software driver development and eliminate pops and clicks via Wolfson’s SilentSwitch™ technology.
The analogue input stage can be configured for single ended or differential inputs.
Up to 3 stereo microphone or line inputs may be connected.
The input impedance is constant with PGA gain setting.
A stereo digital microphone interface is provided, which can also be mixed with the mic/line signals at the output mixers.
A dynamic range controller provides compression and level control to support a wide range of portable recording applications.
Anti-clip and quick release features offer good performance in the presence of loud impulsive noises.
Common audio sampling frequencies are supported from a range of external clocks, either directly or generated via the Frequency Locked Loop (FLL).
The WM8903 can operate directly from a single 1.
8V switched supply.
For optimal power consumption, the digital core can be operated from a 1.
0V supply.
FEATURES  4.
5mW power consumption for DAC to headphone playback  DAC SNR 96dB typical, THD -86dB typical  ADC SNR 92dB typical, THD -80dB typical  Control sequencer for pop minimised start-up and shutdown  Single register write for default start-up sequence  Integrated FLL provides all necessary clocks - Self-clocking modes allow processor to sleep - ...


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