WM8750LEFL/R WOLFSON [Wolfson Microelectronics plc], WM8750LEFL/R Datasheet

WM8750LEFL/R

Manufacturer Part Number

WM8750LEFL/R

Description

STEREO CODEC FOR PORTABLE AUDIO APPLICATIONS

Manufacturer

WOLFSON [Wolfson Microelectronics plc]

Datasheet

1.WM8750LEFLR.pdf (56 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

WM8750LEFL/R

Manufacturer:

WOLFSON

Quantity:

20 000

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HPDETECT

DESCRIPTION

The WM8750L is a low power, high quality stereo codec

designed for portable digital audio applications.

The device integrates complete interfaces to stereo or mono

microphones and a stereo headphone. External component

requirements are drastically reduced as no separate

microphone

Advanced on-chip digital signal processing performs

graphic equaliser, 3-D sound enhancement and automatic

level control for the microphone or line input.

The WM8750L can operate as a master or a slave, with

various master clock frequencies including 12 or 24MHz for

USB devices, or standard 256f

24.576MHz. Different audio sample rates such as 96kHz,

48kHz, 44.1kHz are generated directly from the master

clock without the need for an external PLL.

The WM8750L operates at supply voltages down to 1.8V,

although the digital core can operate at voltages down to

1.42V to save power, and the maximum for all supplies is

3.6 Volts. Different sections of the chip can also be powered

down under software control.

The WM8750L is supplied in a very small and thin 5x5mm

QFN package, ideal for use in hand-held and portable

systems.

BLOCK DIAGRAM

WOLFSON MICROELECTRONICS plc

www.wolfsonmicro.com

RINPUT3/

RINPUT2

RINPUT1

MICBIAS

LINPUT1

LINPUT2

LINPUT3

L1-R1 OR

INPUT

L2-R2

DIFF.

Stereo CODEC for Portable Audio Applications

headphone

DC MEASUREMENT

LINSEL

RINSEL

DC MEASUREMENT

ANALOGUE

MONO MIX

BOOST

+ MIC

LMIXSEL

RMIXSEL

PGA

50K

amplifiers

rates like 12.288MHz and

ADC

are

DGND

MONO MIX

ENHANCE

FILTERS

VOLUME

DIGITAL

required.

W M8750L

INTERFACE

AUDIO

EQUALISER

DCVDD

GRAPHIC

FILTERS

DIGITAL

BOOST

BASS

CIRCUITRY

DAC

DBVDD

FEATURES

•

APPLICATIONS

•

CLOCK

DAC SNR 98dB (‘A’ weighted), THD -95B at 48kHz, 3.3V

ADC SNR 95dB (‘A’ weighted), THD -90dB at 48kHz, 3.3V

Complete Stereo / Mono Microphone Interface

On-chip 400mW BTL Speaker Driver (mono)

On-chip Headphone Driver

Separately mixed mono output

Digital Graphic Equaliser

Low Power

Low Supply Voltages

256fs / 384fs or USB master clock rates: 12MHz, 24MHz

Audio sample rates: 8, 11.025, 16, 22.05, 24, 32, 44.1, 48,

5x5x0.9mm QFN package

MP3 Player / Recorder

AAC/WMA/Multi-Format Player / Recorder

Minidisc Player / Recorder

Portable Digital Music Systems

88.2, 96kHz generated internally from master clock

RD2LO

LD2RO

LD2LO

LD2MO

RD2RO

Programmable ALC / Noise Gate

>40mW output power on 16Ω / 3.3V

THD –80dB at 20mW, SNR 90dB with 16Ω load

No DC blocking capacitors required (capless mode)

7mW stereo playback (1.8V / 1.5V supplies)

14mW record & playback (1.8V / 1.5V supplies)

Analogue 1.8V to 3.6V

Digital core: 1.42V to 3.6V

Digital I/O: 1.8V to 3.6V

RD2MO

MIXER

MONO

MIXER

RIGHT

MIXER

LEFT

INTERFACE

CONTROL

LI2MO

RI2MO

RI2RO

RI2LO

LI2RO

LI2LO

Product Preview, May 2003, Rev 1.77

MONOOUT

HPGND

ROUT1

VREF

-1

OUT3SW

ROUT2

HPVDD

INV

WM8750L

ROUT1VOL

ROUT2VOL

LOUT1VOL

MONOVOL

LOUT2VOL

-1

OUT3

LOUT1

MONOOUT

(phone TX)

ROUT1

LOUT2

ROUT2

L - (-R)

= L+R

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