WM8955BLGECO Wolfson Microelectronics, WM8955BLGECO Datasheet
WM8955BLGECO
Manufacturer Part Number
WM8955BLGECO
Description
Manufacturer
Wolfson Microelectronics
Datasheet
1.WM8955BLGECOV.pdf
(44 pages)
Specifications of WM8955BLGECO
Case
QFN28
Date_code
09+
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DESCRIPTION
The WM8955BL is a low power, high quality stereo DAC with
integrated headphone and earpiece amplifiers, designed to
reduce external component requirements in portable digital
audio applications.
The on-chip headphone amplifiers can deliver 40mW into a 16Ω
load. Advanced on-chip digital signal processing performs bass
and treble tone control.
The WM8955BL can operate as a master or a slave, and
includes an on-chip PLL. It can use most master clock
frequencies commonly found in portable systems, including
USB, GSM, CDMA or PDC clocks, or standard 256f
Different audio sample rates such as 48kHz, 44.1kHz, 8kHz and
many others are supported.
The WM8955BL operates on supply voltages from 1.8V up to
3.6V, although the digital core can operate on a separate supply
down to 1.42V, saving power. Different sections of the chip can
also be powered down under software control.
The WM8955BL is supplied in a very small and thin 4x4mm
QFN package, ideal for use in hand-held and portable systems.
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clock rates.
FEATURES
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APPLICATIONS
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DAC SNR 98dB, THD -86dB (‘A’ weighted @ 48kHz, 3.3V)
On-chip Headphone Driver
On-chip BTL Earpiece Driver (mono)
Stereo and Mono Line-in mix into DAC output
Separately Mixed Stereo and Mono Outputs
Digital Tone Control and Bass Boost
Low Power
Low Supply Voltages
Master clocks supported: GSM, CDMA, PDC, USB or
Audio sample rates supported: 8, 11.025, 12, 16, 22.05, 24,
28-lead QFN package, 4x4x0.75mm size
Software compatible with WM8750L, WM8751L, WM8955L
Smartphone / Multimedia Phone
Digital Audio Player
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standard audio clocks
32, 44.1, 48, 88.2, 96kHz
40mW output power on 16Ω / 3.3V
SNR 96dB, THD –79dB at 20mW with 16Ω load
Down to 7mW for stereo playback (1.8V / 1.5V supplies)
10μW Shutdown Mode
Analogue and Digital I/O: 1.8V to 3.6V
Digital core: 1.42V to 3.6V
Copyright ©2007 Wolfson Microelectronics plc
Production Data, February 2007, Rev 4.1
WM8955BL
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