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UDA1341TS

Economy audio CODEC for MiniDisc (MD) home stereo and portable applications

NXP Semiconductors. 

NXP Semiconductors

Economy audio CODEC for MiniDisc (MD)

home stereo and portable applications

Product specification

UDA1341TS

7.16 Filter Stream Digital-to-Analog Converter

(FSDAC)

The FSDAC is a semi-digital reconstruction filter that

converts the 1-bit data stream of the noise shaper to an

analog output voltage. The filter coefficients are

implemented as current sources and are summed at virtual

ground of the output operational amplifier. In this way very

high signal-to-noise performance and low clock jitter

sensitivity is achieved. A post filter is not needed due to the

inherent filter function of the DAC. On-board amplifiers

convert the FSDAC output current to an output voltage

signal capable of driving a line output.

7.17 Multiple format input/output interface

The UDA1341TS supports the following data formats:

• I2S-bus with word length up to 20 bits

• MSB-justified serial format with word length up to 20 bits

• LSB-justified serial format with word length of

16, 18 or 20 bits

• MSB data output with LSB 16, 18 or 20 bits input.

Left and right data-channel words are time multiplexed.

The formats are illustrated in Fig.4.

The UDA1341TS allows for double speed data monitoring

purposes. In this case the sound features bass boost,

treble and de-emphasis cannot be used. However, volume

control and soft-mute can still be controlled. The double

speed monitoring option can be set via the L3-interface.

The bit clock frequency must be 64 times word select

frequency or less, so fBCK ≤ 64 × fWS.

2002 May 16

9

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