wm8962 Wolfson Microelectronics plc, wm8962 Datasheet

wm8962

Manufacturer Part Number

wm8962

Description

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

Manufacturer

Wolfson Microelectronics plc

Datasheet

1.WM8962.pdf (9 pages)

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WOLFSON MICROELECTRONICS plc

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DESCRIPTION

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 -

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, or 2W mono into a 4Ω load, with a 5V supply. Low

leakage,

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: 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

frequencies, and ReTune

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 Exact Fractional Synthesis

(EFS) 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.

Ultra-Low Power Stereo CODEC with Audio Enhancement

DSP, 1W Stereo Class D Speaker Drivers and Ground

excellent

PSRR

to optimise efficiency and power

image, HD Bass enhances low

flattens the frequency response of

Referenced Headphone Drivers

and

http://www.wolfsonmicro.com/enews

pop/click

suppression

FEATURES

•

APPLICATIONS

•

Portable gaming

Voice recorders

Mobile multimedia

Stereo DSC-Camcorder

DAC SNR 98dB (‘A’ weighted), THD -79dB at 48kHz, 1.8V

ADC SNR 94dB (‘A’ weighted), THD -86dB at 48kHz, 1.8V

Stereo Class D Speaker Driver

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

Microphone Interface

Programmable Audio Enhancement DSP with Presets

Fixed Audio Processing DSP

Two integrated PLLs enable clocking of full audio system

Low Power Consumption

Low Supply Voltages

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

1W per channel into 8Ω BTL speakers

2W mono into 4Ω BTL speakers

Flexible internal switching clock

Ground Referenced

Low offset (+/- 1.5mV)

Pop and click suppression

Control sequencer for pop-minimised power-up/down

Single register write for default start-up sequence

Single ended four stereo analogue input

Integrated low noise MICBIAS

Digital microphone interface

Programmable ALC / Limiter and Noise Gate

Virtual Surround Sound

HD Bass

ReTune

3D stereo widening

5-band Parametric EQ

Dynamic range controller

Beep generator

6.99mW headphone playback (1.8V supplies, Low

Power mode)

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

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

THD+N into 16Ω at 1.8V

Product Brief, July 2010, Rev 2.0

WM8962

Related parts for wm8962

wm8962 Summary of contents

Page 1

... The speaker supply can operate 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. WOLFSON MICROELECTRONICS plc To receive regular email updates, sign up ...

Page 2

... Preliminary Technical Data BLOCK DIAGRAM w WM8962 Product Brief, July 2010, Rev 2.0 2 ...

Page 3

... Preliminary Technical Data PIN CONFIGURATION ORDERING INFORMATION ORDER CODE TEMPERATURE RANGE WM8962ECSN/R -40°C to +85°C Note: Reel quantity = 3,500 w MOISTURE PACKAGE SENSITIVITY LEVEL 49-ball CSP MSL1 (3.6x3.9mm) (Pb-free, Tape and reel) WM8962 PEAK SOLDERING TEMPERATURE 260°C Product Brief, July 2010, Rev 2.0 3 ...

Page 4

... Digital Microphone Input / General purpose input / output Digital Input / Output Digital Core Supply Supply Supply Digital Buffer Supply Supply PLL Supply Supply PLL Ground Analogue Output FLL / Oscillator Clock output Digital Input Master clock input / xtal input WM8962 DESCRIPTION Product Brief, July 2010, Rev 2.0 4 ...

Page 5

... SPKVDD1 and SPKVDD2 must be high enough to support the peak output voltage when using CLASSD_VOL function, to avoid output waveform clipping. Peak output voltage is AVDD*CLASSD_VOL. w SYMBOL MIN DCVDD 1.62 DBVDD 1.62 MICVDD 1.7 AVDD 1.7 PLLVDD 1.7 CPVDD 1.7 SPKVDD1, SPKVDD2 1.7 DGND, AGND, CPGND, SPKGND1, SPKGND2, PLLGND WM8962 MIN MAX -0.3V +2.5V -0.3V +4.5V -0.3V +7.0V -0.3V +2.2V DGND -0.3V DBVDD +0.3V AGND -0.3V AVDD +0.3V -CPVDD-0.3V +CPVDD+0.3V -40°C +85°C -40°C +150°C -65°C +150° ...

Page 6

... A flexible switching clock for the class D speaker drivers (synchronous with the audio DSP clocks for best performance) is also derived from SYSCLK. To allow full software control over all its features, the WM8962 supports 2-wire (I2C) and 3- or 4-wire (SPI) serial control interface modes, with full read-back capability on all registers. The WM8962 is fully compatible with, and an ideal partner to, a wide range of industry standard microprocessors, controllers and DSPs ...

Page 7

... Preliminary Technical Data RECOMMENDED EXTERNAL COMPONENTS w WM8962 Product Brief, July 2010, Rev 2.0 7 ...

Page 8

... FOLLOWS JEDEC DESIGN GUIDE MO-211-C. w 3.984 0.7mm BODY, 0.50 mm BALL PITCH X X DETAIL CORNER DETAIL 2 MAX NOTE 0.750 0.269 0.481 3.624 4.014 5 DM075 0.10 Z TOP VIEW 0. SOLDER BALL f2 h Product Brief, July 2010, Rev 2.0 WM8962 E 8 ...

Page 9

... Wolfson is not liable for any such representations, warranties or liabilities or for any reliance placed thereon by any person. ADDRESS Wolfson Microelectronics plc Westfield House 26 Westfield Road Edinburgh EH11 2QB United Kingdom Tel :: +44 (0)131 272 7000 Fax :: +44 (0)131 272 7001 Email :: sales@wolfsonmicro.com w WM8962 Wolfson is not liable for any Product Brief, July 2010, Rev 2.0 9 ...

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