DataSheetWiki


WM8962B fiches techniques PDF

Cirrus Logic - Ultra-Low Power Stereo CODEC

Numéro de référence WM8962B
Description Ultra-Low Power Stereo CODEC
Fabricant Cirrus Logic 
Logo Cirrus Logic 





1 Page

No Preview Available !





WM8962B fiche technique
WM8962B
Ultra-Low Power Stereo CODEC with
Audio Enhancement DSP, 2W Stereo Class D Speaker
Drivers and Ground Referenced Headphone Drivers
DESCRIPTION
FEATURES
The WM8962B 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 2W per channel into 4
BTL 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: 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 ReTuneTM 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 WM8962B 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 WM8962B 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
- 2W per channel into 4BTL speakers
- 2W mono (for improved THD)
- Flexible internal switching clock
Wolfson ‘Class-W’ ultra-low power headphone driver
- Up to 31mW per channel output power at 1% THD+N
into 16at 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
- ReTuneTM
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
Mobile multimedia
Voice recorders and Stereo DSC-Camcorder
http://www.cirrus.com
Copyright Cirrus Logic, Inc., 20112015
(All Rights Reserved)
Rev 4.2
FEB ‘15

PagesPages 30
Télécharger [ WM8962B ]


Fiche technique recommandé

No Description détaillée Fabricant
WM8962 Ultra-Low Power Stereo CODEC Wolfson Microelectronics
Wolfson Microelectronics
WM8962 Ultra-Low Power Stereo CODEC Cirrus Logic
Cirrus Logic
WM8962B Ultra-Low Power Stereo CODEC Cirrus Logic
Cirrus Logic

US18650VTC5A

Lithium-Ion Battery

Sony
Sony
TSPC106

PCI Bus Bridge Memory Controller

ATMEL
ATMEL
TP9380

NPN SILICON RF POWER TRANSISTOR

Advanced Semiconductor
Advanced Semiconductor


www.DataSheetWiki.com    |   2020   |   Contactez-nous  |   Recherche