UDA1345TS

General description

The UDA1345TS is a single-chip stereo Analog-to-Digital Converter (ADC) and Digital-to-Analog Converter (DAC) 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 UDA1345TS supports the I²S-bus data format with word lengths of up to 24 bits, the MSB justified data format with word lengths of up to 20 bits and the LSB justified serial data format with word lengths of 16, 18 and 20 bits.
The UDA1345TS also supports three combined data formats with MSB justified data output and LSB 16, 18 and 20 bits data input.

The UDA1345TS can be used either with static pin control or under L3 microcontroller interface. In L3 mode the UDA1345TS has basic sound features in playback mode such as de-emphasis, volume control and soft mute.

Features

General

• Low power consumption
• 2.4 to 3.6 V power supply range with 3.0 V typical
• 5 V tolerant TTL compatible digital inputs
• 256, 384 and 512f_s system clock
• Supports sampling frequencies from 8 to 100 kHz
• Non-inverting ADC plus integrated high-pass filter to cancel DC offset
• The ADC supports 2 V (RMS) input signals
• Overload detector for easy record level control
• Separate power control for ADC and DAC
• Integrated digital interpolation filter plus non-inverting DAC
• Functions controllable either by L3 microcontroller interface or via static pins
• The UDA1345TS is pin and function compatible with the UDA1344TS
• Small package size (SSOP28).

Multiple format input interface

• I²S-bus, MSB-justified up to 24 bits and LSB-justified 16, 18 and 20 bits format compatible
• Three combined data formats with MSB data output and LSB 16, 18 and 20 bits data input
• 1f_s input and output format data rate.

DAC digital sound processing

The sound processing features of the UDA1345TS can only be used in L3 microcontroller mode:

• Digital dB-linear volume control (low microcontroller load) via L3 microcontroller with 1 dB steps
• Digital de-emphasis for 32, 44.1 and 48 kHz
• Soft mute via cosine roll-off (in 1024 samples).

Note: in contrast to the UDA1344TS, the UDA1345TS does not have bass-boost and treble.

Advanced audio configuration

• Stereo single-ended input configuration
• Stereo line output (under microcontroller volume control), no post filter required
• High linearity, dynamic range and low distortion.

Products/packages

Quality/reliability/chemical content

Quality and reliability disclaimer

Pricing/ordering/availability

Block diagrams/pinning

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Disclaimers

• General product disclaimer
• Quality and reliability disclaimer