TS4657 Datasheet, PDF (1/26 Pages) STMicroelectronics – Single supply stereo digital audio line driver with 2.2 Vrms capless outputs

TS4657
Single supply stereo digital audio line driver
with 2.2 Vrms capless outputs
Features
■ Single 3.0 to 5.5 V supply for DAC and line
driver
■ Audio line output: 2.2 Vrms for all V_CC range
■ 16- to 24-bit audio data format stereo DAC, 32
to 48 kHz sample rate
■ I²S, right- or left-justified compatible digital
audio interface
■ 95 dB SNR A-weighted at 48 kHz, V_CC =5 V
■ 7.4 mA current consumption at V_CC = 3.0 V,
full operation
■ Internal negative power supply to ensure
ground-referenced, capless outputs
■ No external capacitor needed for the negative
power supply generation
■ Integrated structure to suppress pop and click
noise
■ Available in thin QFN20 4 mm x 4 mm package
Applications
■ Digital set-top boxes
■ DVD players
■ Digital TVs
■ Notebooks
■ Portable audio equipment
■ Sound cards
Pin connections (top view)
20
GNDD 1
NC
LRCLK
SDAT
BCLK 5
6
16
15 GNDA
VREGA
VCCA
VOUTL
11 VOUTR
10
Description
The TS4657 is a stereo DAC that integrates a
high-performance audio line driver capable of
generating a 2.2 Vrms output level from a single
3.0 to 5.5 V supply.
One single supply is sufficient for the digital and
analog parts of the circuit, thus eliminating the
need for external regulators.
The TS4657 is a low-power consumption device.
It features only 22 mW power dissipation at a
3.0 V power supply in full operation.
A 16-bit multi-bit sigma delta DAC is used,
operating at 256xFs with oversampling digital
interpolation filters. The digital audio data can be
16-to 24-bit long and sample rates from 32 to
48 kHz are supported.
The output stage signal is ground-referenced by
using an internal self-generated negative power
supply, and as such external bulky output
coupling capacitors are not necessary.
The TS4657 is packaged in a small 4 x 4 mm
QFN20 package, ideal for portable applications.
March 2009
Rev 1
1/26
www.st.com
26