WM8962B Datasheet, PDF (1/295 Pages) Wolfson Microelectronics plc – Ultra-Low Power Stereo CODEC with Audio Enhancement DSP, 1W Stereo Class D Speaker Drivers and Ground Referenced Headphone Drivers

WM8962
Ultra-Low Power Stereo CODEC with
Audio Enhancement DSP, 1W Stereo Class D Speaker Drivers
and Ground Referenced Headphone Drivers
DESCRIPTION
FEATURES
The WM8962 is a low power, high performance stereo CODEC
designed for portable digital audio applications.
An integrated charge pump provides a ground referenced output
which removes the need for DC-blocking capacitors on the
headphone outputs, and uses the Wolfson ‘Class-W’ amplifier
techniques - incorporating an innovative dual-mode charge
pump architecture - to optimise efficiency and power
consumption during playback. A DC Servo is used to reduce DC
ground offsets. This improves power consumption and
minimises pops and clicks.
Stereo class D speaker drivers provide 1W per channel into 8
loads, or 2W mono into a 4 load, with a 5V supply. Low
leakage, excellent PSRR and pop/click suppression
mechanisms also allow direct battery connection to the speaker
supply. Flexible speaker boost settings allow speaker output
power to be maximised while minimising other analogue supply
currents.
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 SilentSwitch™
technology.
Flexible input configuration: four stereo inputs or eight mono
inputs on Left or Right ADC, with a complete analogue (four
single-ended stereo inputs) and digital microphone interface.
External component requirements are drastically reduced as no
separate microphone, speaker or headphone amplifiers are
required. Advanced on-chip digital signal processing performs
automatic level control for the microphone or line input.
Stereo 24-bit sigma-delta ADCs and DACs are used with low
power over-sampling digital interpolation and decimation filters
and a flexible digital audio interface.
A programmable audio enhancement DSP is included with
multiple preset algorithms. Virtual Surround Sound widens the
stereo speaker audio image, HD Bass enhances low
frequencies, and ReTune^TM flattens the frequency response of
the speaker or microphone path. A configurable DSP includes
additional functions such as 3D widening for recording, a 5-band
parametric EQ and Dynamic Range Controller.
Two high performance PLLs and one Frequency Locked Loop
(FLL) are integrated to enable the user to clock a full audio
system.
The WM8962 operates at analogue supply voltages down to
1.7V, although the digital supplies can operate at voltages down
to 1.62V to save power. The speaker supply can operate at up
to 5.5V. Unused functions can be disabled using software
control to save power.
The WM8962 is supplied in a very small W-CSP package, ideal
for use in hand-held and portable systems.
 DAC SNR 98dB (‘A’ weighted), THD -84dB at 48kHz, 1.8V
 ADC SNR 94dB (‘A’ weighted), THD -85dB at 48kHz, 1.8V
 Stereo Class D Speaker Driver
- 1W per channel into 8 BTL speakers
- 2W mono into 4 BTL speakers
- Flexible internal switching clock
 Wolfson ‘Class-W’ ultra-low power headphone driver
- Up to 31mW per channel output power at 1% THD+N
into 16 at 1.8V
- Ground Referenced
- Low offset (+/- 1.2mV)
- Pop and click suppression
- Control sequencer for pop-minimised power-up/down
- Single register write for default start-up sequence
 Microphone Interface
- Single ended four stereo analogue input
- Integrated low noise MICBIAS
- Digital microphone interface
- Programmable ALC / Limiter and Noise Gate
 Programmable Audio Enhancement DSP with Presets
- Virtual Surround Sound
- HD Bass
- ReTune^TM
 Fixed Audio Processing DSP
- 3D stereo widening
- 5-band Parametric EQ
- Dynamic range controller
- Beep generator
 Two integrated PLLs enable clocking of full audio system
 Low Power Consumption
- 7.7mW headphone playback
- 8.3mW analogue record mode
 Low Supply Voltages
- Analogue 1.7V to 2.0V (Speaker supply up to 5.5V)
- Charge pump 1.7V to 2.0V
- MIC bias amp supply 1.7V to 3.6V
- Digital 1.62V to 2.0V
 2-wire I2C and 3- or 4-wire SPI serial control interface
 Standard sample rates from 8kHz to 96kHz
 W-CSP, 3.6x3.9mm 49-pin
APPLICATIONS
 Portable gaming, Voice recorders
 Mobile multimedia
 Stereo DSC-Camcorder
http://www.cirrus.com
Copyright  Cirrus Logic, Inc., 2009–2015
(All Rights Reserved)
Rev 4.3
JUN ‘15