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Wolfson Microelectronics plc - MONO CODEC WITH SPEAKER DRIVER

Numéro de référence WM8510
Description MONO CODEC WITH SPEAKER DRIVER
Fabricant Wolfson Microelectronics plc 
Logo Wolfson Microelectronics plc 





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WM8510
Mono CODEC with Speaker Driver
DESCRIPTION
FEATURES
The WM8510 is a low power, high quality mono codec designed
for Voice over Internet Protocol (VoIP) and Digital Telephones.
The device integrates support for one pseudo-differential and
one single ended input (Handset Mic and Speaker Mic) and
includes drivers for speakers or headset, and mono line output,
making it ideal for Telephone designs. External component
requirements are reduced as no separate microphone or
earpiece amplifiers are required.
Advanced Sigma Delta Converters are used along with digital
decimation and interpolation filters to give high quality audio at
sample rates from 8 to 48kHz.
Additional digital filtering options are available in the ADC path,
to cater for application filtering such as ‘wind noise reduction’,
plus an advanced mixed signal ALC function with noise gate is
provided.
An on-chip PLL is provided to generate the required Master
Clock from an external reference clock. The PLL clock can also
be output if required elsewhere in the system.
The WM8510 operates at supply voltages from 2.5 to 3.6V,
although the digital supplies can operate at voltages down to
1.71V to save power. The speaker and mono outputs use a
separate supply of up to 5V which enables increased output
power if required. Different sections of the chip can also be
powered down under software control by way of the selectable
two or three wire control interface.
WM8510 is supplied in a convenient 28-lead SSOP package,
offering high levels of functionality in an easy to use package.
BLOCK DIAGRAM
Mono Codec:
Audio sample rates:8, 11.025, 16, 22.05, 24, 32, 44.1,
48kHz
DAC SNR 93dB, THD -84dB (‘A’-weighted @ 8 – 48kHz)
ADC SNR 90dB, THD -80dB (‘A’-weighted @ 8 – 48kHz)
On-chip Headphone/Speaker Driver with ‘cap-less’ connect
- 40mW output power into 16/ 3.3V SPKVDD
- BTL speaker drive 0.8W into 8/ 5V SPKVDD
Earpiece Line output
Multiple analog inputs, plus analog bypass path (0 or -10dB)
Mic Preamps:
Two Microphone Interfaces
- One pseudo-differential input with common mode
rejection
- One single ended input
- Programmable preamp gain
- Programmable ALC / Noise Gate in ADC path
Low-noise bias supplied for microphone
Other Features
Digital Playback Limiter
Programmable ADC High Pass Filter (wind noise reduction)
Programmable ADC Notch Filter
On-chip PLL
Low power, low voltage
- 2.5V to 3.6V (digital supplies: 1.71V to 3.6V)
- power consumption <10mW all-on 48kHz mode
28 lead SSOP package
APPLICATIONS
VoIP Telephones
Digital Telephones
Conference Speaker-phone
Mobile Telephone Hands-free Kits
General Purpose low power audio CODEC
MIC2
NOISY
GNDMICN
Mic
MICP
Rbias
MICBIAS
20k
20k
Gains
: -12dB to
+35.25dB
IP PGA
IP BOOST/MIX
25k 25k
4k 5k 250k 250k
I2 S or PCM
INTERFACE
W
WM8510
ADC
ADC
DIGITAL
FILTERS
DAC
DIGITAL
FILTERS
Volume
Limiter /
ALC
Wind Noise
Filters
Volume
Digital
Limiter
DAC
SIDETONE
PLL
CONTROL
INTERFACE
-10dB or +0dB
MONO OUT
-10dB or +0dB
-1
SPKR PGA
SPKOUTP
L - (-R)
= L+R
SPKOUTN
WOLFSON MICROELECTRONICS plc
To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews/
Production Data, September 2008, Rev 4.5
Copyright ©2008 Wolfson Microelectronics plc

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