34.807IRELESS
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34.807IRELESS
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DATA BRIEF
For further information contact your local STMicroelectronics sales office.
Rev 1
October 2005 CD00059404 1/4
4
STw5095
Low Power Asynchronous Stereo Audio Codec
with Integrated Power Amplifiers
Features
■20 bit audio resolution, 8kHz to 96kHz
independent rate ADC and DAC
■Asynchronous sampling ADC and DAC: they
do not require oversampled clock and
information on the audio data sampling
frequency (fs). Jitter tolerant fs
■Wide master clock range: from 4MHz to 32MHz
■I2C/SPI compatible control I/F.
■Stereo headphones drivers, handsfree
loudspeaker driver, line out drivers
■Mixable analog line inputs
■Voice filters: 8/16kHz with voice channel filters
■Automatic gain control for microphone and line-
in inputs
■Two programmable master/slave serial audio
data interfaces (I2S, SPI, PCM compatible and
other formats)
■Freque ncy pr ogr am mab le cl ock outputs
■Multibit Σ∆ modulators with data weighted
averaging ADC and DAC
■DSP functions for bass-treble-volume control,
mute, mono/stereo selection, voice channel
filters, de-emphasis filter and dynamic
compression.
■93 dB dynamic range ADC, 0.001% THD with
full scale output @ 2.7V
■95 dB dynamic range DAC, 0.02% THD
performance @ 2.7V over 16Ω load
Analog inputs
■Selectable stereo differential or single-ended
microphone amplifier inputs with 51dB range
programmable gain.
■One microphone biasing output.
■Microphone plug-in and push-button detection
input
■Selectable stereo differential or single-ended
line inputs with 38 dB range programmable
gain
Analog output drivers
■Stereo headphones outputs driving capability:
40 mW (0.1% THD) ov er 16Ω with 40 dB range
programmable gain
■Common mode voltage headphones driver
(phantom ground)
■Balanced loudspeaker output driving
capability: up to 500mW (VCCLS>3.5V; 1%
THD) over 8Ω with 30dB range programmable
gain
■Transient supression filter during power up and
power down
■Balanced/unbalanced stereo line outputs
driving capability 1kΩ
Applications
■Digital cellular telephones with mp3 player,
stereo recorder, fm radio stereo listening and
recording functions, live music recording.
■Portable digital players and recorders.
TFBGA 5x5 (64 pins)
STw5095
www.st.com
STw5095
2/4 CD00059404
Description
STw5095 is a Low Power Asynchronous Stereo Audio CODEC device with Headphones Amplifiers for
high quality audio listening and recording.
The STw5095 control re giste rs are acces sed throu gh a selec table I2C-bus compat ible or SPI com patible
interface.
The STw5095 Asynchronous Stereo A udio Codec is designed to easily fit in most audio systems because
it supports an extended master clock range (any v alue between 4 MHz and 32 MHz) and at the same time
it supports any audio data rate (independent in AD and DA paths) from 8 kHz to 48 kHz and from 88 kHz
to 96 kHz, moreover it can tolerate jitter on audio data without degrading performance. The audio data
serial interfaces (for AD and DA) can be Master or Slave, are I2S compatible and they support other
f ormats that can easily interface to standard serial ports. The two audio interfaces can be used as a single
bidirecti ona l i nter face. Two freq uen cy programma ble Clock Sources are available to generate the ma ste r
clock for the audio sub-system of other de vices. The internal D to A and A to D conv erters work with up to
24 bit resolution.
The supply voltage can be the same for the whole device, in the range 2.4 V to 2.7 V, or it can be
differentiated for digital (VCC: 1.8 V to 2.7 V), analog (VCCA: 2.4 V to 3.3 V) and loudspeaker driver
(VCCLS: VCCA to 5.5 V) to obtain best performance and maximum power to the loudspeaker (up to
500 mW).
STw5095 has multiple analog mixable inputs and outputs. It can directly drive Stereo Headphones without
ex ternal capacitors and it has a Loudspeaker driver that can also be used f or monophonic group listening.
Stereo differential and single ended microphones, auxiliary line in stereo and mono signals can be mixed
and connected to the ADC or directly to the drivers, mixed also with DAC audio signals.
STw5095 Stereo Audio Codec main applications include multimedia handheld devices such as cellular
phones with added low-power high-quality MP3 and⁄or FM radio listening/recording features, or any
battery powered equipment such as PDAs, Camcorders, etc. that require Stereo Audio Codec with
Headphones drivers.
Order codes
Part Number Details
STw5095 TFBGA 64 Tray
STw5095T TFBGA 64 Tape and Reel
STw5095
CD00059404 3/4
Functional block diagram
MCK
AD Sample
Rate
Converter
DA Sample
Rate
Converter
Transient
Suppr.
Filter
Transient
Suppr.
Filter
Bandgap
CK Gen/
Master
Mode
Digital
DA-PLL
PLL
Control
Logic
Power-On
Reset Registers Control
I/F
Digital
AD-PLL
Audio
AD-I/F
Headset
Detection
Transient
Suppr.
Filter
Left
LineOut
-40:0 dB Step 2
-40:0 dB Step 2
Right
Driver
LOG: -18:0 dB Step 3
Right
LineOut
VCCIOGNDVCCGNDCMGNDPVCCLSVCCPGNDAVCCA
L
(L+R)/2
R
Stereo
Diff.
Stereo
Sing.E.
Stereo
Sing.E.
Stereo
Diff.
Stereo
Sing.E.
Comm.
Mode
CurrentBias
Stereo DAC
STw5095
Left
Driver
CM
Driver
Voltage
Reference
-20:+18 dB Step 2
-24:6 dB Step 2
Mono
Driver
MICLO
LSSEL
MIXLIN
MIXMIC
ADMIC ADLIN
IRQ
Gen
AD_SYNC
CAPLINEIN
CAPMIC
LINEINL
LINEINR
AUX3R
AUX3L
AUX2NR
AUX2PR
AUX2NL
AUX2PL
AUX1R
AUX1L
MICRN
MICRP
MICLN
MICLP
MBIAS
VCMHP
VCMHPS
OLP
OLN
HPL
LSPS
LSP
CAPLS
LSN
LSNS
HPR
ORP
ORN
AD_CK
AD_DATA
CMOD
AS/CSB
SCLK
SDA/SDIN
HDET
IRQ
AD_OCK
AMCK
DA_OCK
DA_SYNC
DA_CK
DA_DATA
Oscillator
Mic.
Bias
DSP
AD to DA
Mixing
Gain
AGC
(Mic&Lin)
ADMONO
DAMONO
(sidetone)
DAC
Digital
Gain
ADC
Digital
Gain
Dyn.Comp.
Bass
Treble
(Audio only)
DA to AD
Mixing
Gain
(Audio Only)
ADRTOL
Stereo ADC
Filter
Audio/Voice
Filter
Audio/Voice
DAC
MIXDAC Modulator
Analog
Filter
Σ∆ADC
LINEIN
AUX1
AUX2
AUX3
MUTE
LIN L-R
Amps
LINSEL LINLG
LINRG
Stereo Path
Audio
DA-I/F
DA_SYNC
AD_SYNC
2.1V
Reference
AGC
(from DSP)
AGC
(from DSP)
RL
LSG
HPLG
HPRG
0÷39 dB
Step 1.5
MIC
AUX1
AUX2
AUX3
MUTE
MIC L-R
PreAmps
MICSEL MICLG
MICRG
-12÷0 dB
Step 1.5
MICLA
MICRA
CK Gen/
Master
Mode
L
R
L
R
Σ∆
STw5095
4/4 CD00059404
Revision history
Date Revision Changes
3-Oct-2005 1Initial release.
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use.
No license is granted by implication or o therwise under any pat ent or patent rights of ST Microelect ronics. Specifications mentioned in this
publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written
approval of ST Microelectronics.
The ST logo is a registered trademark of STMicr oelectronic s.
All other names are the property of thei r r espective owners
© 2005 STMicroelectronics - All rights reserved
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