PRELIMINARY DATA
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.
Rev 1.0
November 2005
1/69
2
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
I
2
C/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 (I
2
S, SPI, PCM compatible and
other formats)
Frequency programmable clock outputs
Multibit
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 16
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) over 16
with 40 dB range
programmable gain
Common mode voltage headphones driver
(phantom ground)
Balanced loudspeaker output driving
capability: up to 500m
W
(V
CCLS
>3.5V; 1%
THD) over 8
with 30dB range programmable
gain
Transient supression filter during power up and
power down
Balanced/unbalanced stereo line outputs
driving capability 1k
Applications
Digital cellular telephones with mp3 player,
stereo recorder, fm radio stereo listening and
recording functions, live music recording
Portable digital players and recorders
STw5095
TFBGA64 5x5 (64 pins)
www.st.com
STw5095
2/69
Description
STw5095 is a low power asynchronous stereo
audio CODEC device with headphones
amplifiers for high quality audio listening and
recording.
The STw5095 control registers are accessed
through a selectable I
2
C-bus compatible or SPI
compatible interface.
The STw5095 asynchronous stereo audio
CODEC is designed to easily fit in most audio
systems because it supports an extended master
clock range (any value 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 I
2
S compatible and they
support other formats that can easily interface to
standard serial ports. The two audio interfaces
can be used as a single bidirectional interface.
Two frequency programmable clock sources are
available to generate the master clock for the
audio sub-system of other devices. The internal
D to A and A to D converters 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 (V
CC
: 1.8 V to 2.7 V),
analog (V
CCA
: 2.4 V to 3.3 V) and loudspeaker
driver (V
CCLS
:
V
CCA
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 external capacitors and it has a
Loudspeaker driver that can also be used for
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.
Ordering codes
Pin configuration (top view)
Part Number
Details
STw5095
TFBGA 64 Tray
STw5095T
TFBGA 64 Tape and Reel
A
B
C
D
E
F
G
H
1
2
3
4
5
6
7
8
SDA/SDIN
VCC
VCCA
HDET
DA_CK
AD_DATA DA_SYNC
IRQ
DA_OCK
AD_OCK
SCLK
GND
AD_CK
AMCK
AD_SYNC DA_DATA
CMOD
VCCA
MICLN
AUX1L
AS/CSB
VCC
GND
MBIAS
GNDA
AUX3L
MICLP
CAPMIC
VCCIO
VCCA
MICRN
AUX1R
CAPLS
LINEINL
AUX2LP
AUX2LN
AUX3R
GNDA
CAPLINEIN MICRP
LSPS
VCMHPS
GNDCM
OLN
LSNS
LINEINR
AUX2RP
AUX2RN
LSP
VCMHP
GNDP
OLP
LSN
VCCP
GNDP
ORN
GNDP
VCCLS
HPL
VCCP
GNDP
VCCLS
HPR
ORP
STw5095
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Contents
1
Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2
Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1
Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2
Device programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.3
Power up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.4
Master clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.5
Data rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.6
Clock generators and master mode function . . . . . . . . . . . . . . . . . . . . . . . . 13
3.7
Audio digital interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.8
Analog inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.9
Analog output drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.10
Analog mixer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.11
AD path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.12
DA path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.13
Analog-only operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.14
Automatic Gain Control (AGC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.15
Interrupt request: IRQ pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.16
Headset plug-in and push-button detection . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.17
Microphone biasing circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4
Control Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.1
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.2
Supply and power control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.3
Gains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.4
DSP control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.5
Analog functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.6
Digital audio interfaces master mode and clock generators . . . . . . . . . . . . . 32
4.7
Digital audio interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.8
Digital filters, software reset and master clock control . . . . . . . . . . . . . . . . . 36
STw5095
4/69
4.9
Interrupt control and control interface SPI out mode . . . . . . . . . . . . . . . . . . 37
4.10
AGC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
5
Control Interface and Master Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5.1
Control interface I2C mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5.2
Control interface SPI mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
5.3
Master clock timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
6
Audio Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
7
Timing Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
8
Operative Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
8.1
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
8.2
Operative supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
8.3
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
8.4
Typical power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
9
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
9.1
Digital interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
9.2
AMCK with sinusoidal input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
9.3
Analog interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
9.4
Headset plug-in and push-button detector . . . . . . . . . . . . . . . . . . . . . . . . . . 54
9.5
Microphone bias . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
9.6
Power supply rejection ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
9.7
LS gain limiter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
10
Analog Input/output Operative Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
10.1
Analog levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
10.2
Microphone input levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
10.3
Line input levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
10.4
Line output levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
10.5
Power output levels HP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
10.6
Power output levels LS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
STw5095
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11
Stereo Audio ADC Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
12
Stereo Audio DAC Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
13
AD to DA Mixing (Sidetone) Specifications . . . . . . . . . . . . . . . . . . . . . . . . 61
14
Stereo Analog-only Path Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 61
15
ADC (TX) & DAC (RX) Specifications With Voice Filters Selected . . . . . 62
16
Typical Performance Plots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
17
Application Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
18
Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
19
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
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