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STW5094A Datasheet

18-bit Low Power Asynchronous Stereo Audio DAC

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STw5094A
18-bit Low Power Asynchronous Stereo Audio DAC
with Integrated Power Amplifiers and Voice Codec
FEATURES
Complete stereo audio digital to analog
converters and filters
– 18-bit, 8 kHz to 48 kHz DAC with sample-rate
conversion
– Linear phase analog&digital filters
www.DataShee1t46U.colomad stereo headphones drivers, 8
load mono loudspeaker driver for group
listening
Stereo audio DAC features
– Asynchronous sampling DAC: does not
require oversampled clock and information
on the audio data sampling frequency.
Jitter tolerant
– Multibit Σ∆ modulator with data weighted
averaging DAC
– 92 dB dynamic range, 0.01% THD over 16
load performance
– Support any sampling frequency in the range
8 kHz to 48 kHz
– DSP functions for bass-treble-volume
controls, deemphasis filter and dynamic
compression
– Tones from tone generator can be injected in
the audio paths
Stereo headphones and loudspeaker/earpiece
power amplifiers features and stereo input for
FM radio features:
– 20 kHz bandwidth stereo headphones
outputs. Driving capability: 40 mW
(typ. 0.1% T.H.D) over 16 with 40 dB range
programmable gain
– Balanced earpieceloudspeaker output.
Driving capability: 300 mW (typ. 0.1% T.H.D)
over 8 with 30dB range programmable gain
– Analog stereo input for FM radio with 38 dB
range programmable gain
TFBGA 6x6 (36 pins)
ORDER CODES: STw5094AD/LF, STw5094ADT/LF
Complete CODEC and filter system
– 14-bit linear or 8-bit companded ADC and
DAC
– Transmit and receive digital band-pass filters
– Active antialias and smoothing filters
– 8 load earpiece/loudspeaker driver,
16 load auxiliary driver
Voice CODEC features
– Support 8 kHz or 16 kHz sampling rate
– One microphone biasing output
– Remote control function
– Three switchable microphone amplifier
inputs. 42.5 dB range programmable gain
– Transient supression during power up and
power down
– Internal programmable sidetone
– Internal ring, tone and dtmf generator
– Programmable PWM buzzer driver
General features
– Single 2.7 V to 3.3 V supply
– Extended temperature range operation 1
-40 °C to 85 °C
– 1 µW standby power (typ. AT 2.7V).
– 16 mW operating power in audio listening
mode (typ. at 2.7 V).
1.Functionality guaranteed in the range -40°C to +85°C; Timing and Electrical Spec. are guaranteed in the range -30°C to +85°C.
December 2005
.
Rev. 2
1/51


STMicroelectronics Electronic Components Datasheet

STW5094A Datasheet

18-bit Low Power Asynchronous Stereo Audio DAC

No Preview Available !

STw5094A
– 11 mW operating power in voice codec mode
(typ. at 2.7 V).
– 1.8 V to 3.3 V CMOS compatible digital
interfaces
– Programmable PCM interface
– I2C compatible control interface
– Programmable master/slave serial audio data
input interface (I2S and other formats)
– Frequency programmable clock output
APPLICATIONS
CDMA,GSM,DCS1800,PCS1900,JDC digital
cellular telephones with MP3 and FM radio
www.DataShseteetr4eUo.cloismtening functions
Portable devices with a stereo digital audio
source and FM radio listening function
GENERAL DESCRIPTION
STw5094A is a low power asynchronous stereo
audio DAC device with headphones amplifiers for
high quality MP3 and FM radio listening. The
STw5094A includes also an high performance
low power combined PCM Codecfilter tailored to
implement the audio front-end functions required
by low voltage low power consumption digital cel-
lular terminals with added MP3 and FM radio lis-
tening.
The STw5094A registers are accessed through an
I2C-bus compatible interface.
The STw5094A asynchronous stereo audio DAC
section is suited for MP3, or any other audio stereo
source, listening. It supports any rate from 8 kHz
to 48 kHz, can tolerate jitter on audio data and
does not requires an oversampled clock. The au-
dio data serial interface can be master or slave, it
is I2S compatible and supports other standard se-
rial interface formats. The internal D to A convert-
ers work with 18 bit input resolution.
The stereo headphones drivers can also be used
for FM radio listening via an auxiliary stereo ana-
log input. A loudspeaker driver can also be used
for monophonic group listening.
The STw5094A voice Codec section can be con-
figured either as a 14-bit linear or as an 8-bit com-
panded PCM coder. The frame voice Codec
sample rate can be either the standard 8 kHz val-
ue or the extended 16 kHz one.
In addition to the stereo audio DAC and Codecfil-
ter functions, STw5094A includes a
toneringDTMF generator that can be used both
in audio listening mode and in voice Codec mode,
a sidetone generation, a buzzer driver output and
a remote control function tailored to handle an ex-
ternal on-hook off-hook button. STw5094A Voice
Codec fulfills and exceeds D3 D4 and CCITT
recommendations and ETSI requirements for dig-
ital handset terminals. The Stereo Audio DAC part
fulfills and exceeds the requirements for MP3
quality and FM radio quality listening. Main appli-
cations include digital mobile phones with added
low-power high-quality MP3 and or FM radio lis-
tening features, or any battery powered equipment
that requires Stereo Audio DAC with Headphones
drivers.
ORDER CODES
Part Number
STw5094AD/LF
STw5094ADT/LF
Description
TFBGA 36 Tray
TFBGA 36 Tape and Reel
2/51


Part Number STW5094A
Description 18-bit Low Power Asynchronous Stereo Audio DAC
Maker STMicroelectronics
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STW5094A Datasheet PDF






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