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DESCRIPTION
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.
WM8860
Multi-Channel High Definition Audio CODEC
FEATURES
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
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
