wm8961 Wolfson Microelectronics plc, wm8961 Datasheet

wm8961

Manufacturer Part Number

wm8961

Description

Ultra-low Power Stereo Codec With 1w Stereo Class D Speaker Drivers And Ground Referenced Headphone Drivers

Manufacturer

Wolfson Microelectronics plc

Datasheet

1.WM8961.pdf (116 pages)

Current page: 1 of 116
Download datasheet (2Mb)

DESCRIPTION

The WM8961 is a low power, high quality 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

output, 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 8Ω

loads 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 Wolfson’s SilentSwitch™ technology.

Flexible input configuration : a stereo input or two mono inputs

on Lch or Rch ADC, with a complete 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.

The WM8961 operates at analogue supply voltages down to

1.71V, 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, providing 1W per channel into 8Ω loads. Unused

functions can be disabled using software control to save power.

The WM8961 is supplied in a very small and thin 5x5mm QFN

package, ideal for use in hand-held and portable systems.

To receive regular email updates, sign up

WOLFSON MICROELECTRONICS plc

Speaker Drivers and Ground Referenced Headphone Drivers

Ultra-Low Power Stereo CODEC with 1W Stereo Class D

http://www.wolfsonmicro.com/enews

FEATURES

•

APPLICATIONS

•

Games consoles

Portable media / DVD players

Mobile multimedia

DAC SNR 98dB (‘A’ weighted), THD -83dB at 48kHz, 1.8V

ADC SNR 88dB (‘A’ weighted), THD -75dB at 48kHz, 1.8V

Stereo Class D Speaker Driver

Wolfson ‘Class-W’ ultra-low power headphone Driver

Microphone Interface

Low Power Consumption

Low Supply Voltages

2-wire serial control interface including read-back

Sample rates: 8, 11.025, 12, 16, 22.05, 24, 32, 44.1, 48

5x5x0.9mm 32 pin QFN package

1W per channel into 8Ω BTL speakers.

Flexible internal switching clock

Up to 22mW per channel output power at -80dB

THD+N into 16Ω at 1.8V

Ground Referenced

Low offset (+/- 1.5mV)

Pop and click suppression

Control sequencer for pop-minimised start-up and

shut-down

Single register write for default start-up sequence

Single ended stereo input

Integrated low noise MICBIAS

Programmable ALC / Limiter and Noise Gate

6.99mW headphone playback (1.8V supplies, Low

Power mode)

Analogue 1.71V to 2.0V (Speaker supply up to 5.5V)

Charge pump 1.71V to 2.0V

MIC bias amp supply 1.71V to 3.6V

Digital 1.62V to 2.0V

Pre-Production, August 2009, Rev 3.1

WM8961

Related parts for wm8961

Related keywords

wm8961 datasheet
wm8961 data sheet
wm8961 pdf datasheet
wm8961 component
wm8961 part
wm8961 distributor
wm8961 RoHS
wm8961 datasheet download