WM8860 Datasheet, PDF (1/184 Pages) Wolfson Microelectronics plc – Multi-Channel High Definition Audio CODEC

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WM8860
Multi-Channel High Definition Audio CODEC
DESCRIPTION
FEATURES
The WM8860 is a high performance multi-channel audio
CODEC designed for high performance portable PC audio
systems. The device offers full compatibility with the Intel High
Definition Audio (HDA) specification revision 1.0, allowing
seamless integration with industry-standard HDA controllers.
The WM8860 has two high performance stereo DACs to enable
four channels of high definition audio. A high-performance
ground-referenced stereo headphone amplifier utilises advanced
charge pump and DC servo technology to minimise system cost
and space without compromise on audio quality. A balanced
line output, which can provide a differential connection to an
external speaker amplifier, is also provided and enables
common mode noise rejection when these traces are routed
across a PCB.
The WM8860 also has two high performance stereo ADCs to
provide Hi-Fi quality analogue line-in and microphone input
digitisation. A low noise microphone bias with programmable
output voltage is provided. Additionally, the CODEC contains a
digital microphone interface capable of supporting up to four
independent digital microphones. One differential stereo input is
provided for line level signals, while one pseudo-differential
stereo input with integrated microphone preamplifier is provided.
The WM8860 also contains a S/PDIF transmitter which is fully
compatible with IEC-60958-3. Two dedicated GPIO pins are
provided, enabling control of external amplifiers or other
additional system components.
The WM8860 is supplied in a small 48-pin QFN package.
 Multi-channel High Definition Audio CODEC
 Fully compatible with Intel High Definition Audio Revision 1.0
 4-Channel DAC, 4-channel ADC
 DAC sampling frequency 8kHz - 192kHz
 ADC sampling frequency 8kHz - 96kHz
 DAC Performance:
- SNR 108dB (‘A’ weighted)
- SNR 105dB (non weighted)
- THD -96dB (at 0dBFS)
 ADC Performance:
- SNR 105dB (‘A’ weighted)
- SNR 102dB (non weighted)
- THD -95dB (at -1dBFS)
 Ground-referenced stereo headphone driver
 Differential line inputs/outputs
 Stereo microphone interface with integrated pre-amp
 Multi-channel digital microphone interface
 IEC-60958-3 compatible S/PDIF transmitter
 Jack detect and load impedance sensing
 Beep generator
 GPIO functionality
 IEEE-754 Single precision 32-bit floating point support
 Power supplies
- Digital core: 1.62V – 1.98V
- Digital buffer: 2.97V – 3.63V
- Analogue:
4.5V – 5.25V
- Charge pump: 4.5V – 5.25V
 48-pin 7mm x 7mm QFN package
APPLICATIONS
 High performance PC audio
 All-in-one desktop PC
 Notebook PC
WOLFSON MICROELECTRONICS plc
Pre-Production, June 2011, Rev 3.3
Copyright 2011 Wolfson Microelectronics plc