UDA1334BTS/N2,112

ADCs/DACs - Special Purpose Overview

The UDA1334BTS is a low-power audio digital-to-analog converter (DAC) manufactured by NXP Semiconductors. It operates on a single supply voltage ranging from 1.8 V to 3.6 V and supports sample frequencies from 8 kHz to 100 kHz. The device integrates a digital interpolation filter, a noise shaper, and a Filter Stream DAC (FSDAC), eliminating the need for external analog post-filtering. It accepts I2S-bus or LSB-justified serial data formats with word lengths up to 24 bits. Key features include automatic system clock detection, digital de-emphasis at 44.1 kHz, mute functionality, and standby/sleep modes for power reduction. The component is housed in an SSOP16 package.

ADCs/DACs - Special Purpose Feature Summary

• Integrated digital filter and FSDAC architecture requiring no external analog output filters
• Supports I2S and LSB-justified data interfaces with word lengths of 16, 20, or 24 bits
• Operates within a 1.8 V to 3.6 V supply range with low current consumption (e.g., ~2.3 mA analog current at 2.0 V)
• Includes digital de-emphasis for 44.1 kHz sampling and programmable mute control

ADCs/DACs - Special Purpose Applications

• Portable MD players
• MP3 players
• DVD players

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific ordering suffix against the manufacturer's current product status documentation. The provided datasheet references the base part number UDA1334BTS; confirm if additional suffixes indicate variations in packaging, tape-and-reel options, or environmental compliance that affect compatibility with existing designs.

ADCs/DACs - Special Purpose Selection Notes

Select this component for slave-mode applications where the host processor provides the system clock, bit clock, and word select signals. Ensure the input data format matches the hardware pin settings for SFOR0 and SFOR1. Verify that the required oversampling ratio (e.g., 128fs, 256fs) aligns with the available system clock frequency and the desired sampling rate.

ADCs/DACs - Special Purpose Part Context

The UDA1334BTS is a dedicated audio DAC designed for portable consumer electronics. It utilizes a semi-digital reconstruction filter technique to achieve high signal-to-noise ratios without complex external analog circuitry. The device is optimized for battery-powered systems due to its low operating voltage and current specifications.

ADCs/DACs - Special Purpose Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Designers should consult NXP Semiconductors for current alternative recommendations or cross-reference based on specific interface and performance requirements.

ADCs/DACs - Special Purpose FAQ

Does the UDA1334BTS require an external analog low-pass filter?

No, the device does not require an analog post-filter because it uses a Filter Stream DAC (FSDAC) which inherently performs the reconstruction filtering function.

What is the maximum supported sampling frequency?

The UDA1334BTS supports sampling frequencies from 8 kHz to 100 kHz, depending on the system clock mode selected.

How is the digital audio interface format configured?

The format is selected via the SFOR0 and SFOR1 pins. These pins allow the selection between I2S-bus format and LSB-justified formats with 16, 20, or 24-bit word lengths.