2000 Jul 31 3
NXP Semiconductors Product specification
Audio CODEC UDA1342TS
1 FEATURES
General
• 2.7 to 3.6 V power supply
• 5 V tolerant digital inputs
• High pin compatibility with UDA1341TS
• 24 bits data path
• Selectable control via L3-bus interface, I
2
C-bus
interface or static pin control; choice of 2 device
addresses in L3-bus and I
2
C-bus mode
• Supports sample frequencies from 16 to 110 kHz
• Separate power control for ADC and DAC
• ADC and Programmable Gain Amplifiers (PGA) plus
integrated high-pass filter to cancel DC offset
• Integrated digital filter plus DAC
• Digital silence detection
• No analog post filtering required for DAC
• Slave mode only applications
• Easy application.
Multiple format data interface
• I
2
S-bus, MSB-justified and LSB-justified format
compatible
• 1f
s
to 4f
s
input and 1f
s
output format data rate.
DAC digital sound processing
• Separate digital logarithmic volume control for left and
right channels in L3-bus mode or I
2
C-bus mode
• Digital tone control, bass boost and treble in L3-bus
mode or I
2
C-bus mode
• Digital de-emphasis for sample frequencies of
32, 44.1, 48 and 96 kHz in L3-bus mode or I
2
C-bus
mode
• Soft or quick mute in L3-bus mode or I
2
C-bus mode
• Output signal polarity control in L3-bus mode or I
2
C-bus
mode
• Digital mixer for ADC output signal and digital serial
input signal.
Advanced audio configuration
• 4 channel (2 × stereo) single-ended inputs with
programmable gain amplifiers and 2 channel
(1 × stereo) single-ended outputs configuration
• Output signal polarity control in L3-bus mode or I
2
C-bus
mode
• High linearity, wide dynamic range, low distortion
• Double differential input configuration for enhanced
ADC sound quality.
2 APPLICATIONS
• Eminently suitable for MiniDisc (MD) home and portable
applications.
3 GENERAL DESCRIPTION
The UDA1342TS is a single-chip 4 channel
analog-to-digital converter and 2 channel digital-to-analog
converter with signal processing features employing
bitstream conversion techniques. The low power
consumption and low voltage requirements make the
device eminently suitable for use in low-voltage low-power
portable digital audio equipment which incorporates
recording and playback functions.
The UDA1342TS supports the I
2
S-bus data format with
word lengths of up to 24 bits, the MSB-justified data format
with word lengths of up to 24 bits and the LSB-justified
serial data format with word lengths of 16, 20 and 24 bits.
The device also supports a combination of the
MSB-justified output format and the LSB-justified input
format.
The UDA1342TS has special sound processing features in
the playback mode such as de-emphasis, volume, mute,
bass boost and treble, which can be controlled by the
microcontroller via the L3-bus or I
2
C-bus interface.
