UDA1355H/N2,557

Overview

The UDA1355H is a stereo audio codec with an SPDIF interface, operating on a 2.7 to 3.6 V power supply. It integrates a digital interpolator filter and DAC alongside an ADC, PGA, and decimator filter, both featuring 24-bit data paths. The device supports IEC 60958 input and output, accepting level I, II, and III timing for inputs and generating full-swing CMOS outputs. It accommodates sampling frequencies from 16 to 100 kHz via the digital I/O interface and utilizes a 12.288 MHz crystal oscillator with a low jitter PLL for clock generation. Control is achieved through static pins or microcontroller interfaces (L3-bus or I2C-bus).

Feature Summary

• Integrated stereo digital-to-analog and analog-to-digital converters with bitstream conversion techniques.
• On-chip amplifier converts IEC 60958 input to CMOS levels, supporting selectable SPDIF input channels.
• Digital sound processing includes programmable gain amplification, volume control, and de-emphasis capabilities.
• Flexible control options via static pins or microcontroller interfaces for defining signal flows.

Applications

• Stereo audio systems requiring integrated SPDIF decoding and encoding.
• Consumer electronics utilizing I2S-bus or MSB/LSB-justified digital audio formats.
• Audio equipment needing independent left and right channel digital processing.

Procurement Notes

Verify component authenticity by checking the marking code against official NXP documentation. Confirm package type QFP44 and lead length specifications. Ensure compliance with RoHS and halogen-free requirements as indicated in material declarations. Check for end-of-life status and availability of alternative sources if necessary.

Selection Notes

Select this component for applications requiring a single-chip solution for stereo audio conversion with SPDIF connectivity. Consider the 2.7 to 3.6 V supply range and the need for a 12.288 MHz external crystal. Evaluate control interface preferences between static pins and microcontroller buses based on system complexity.

Part Context

The UDA1355H belongs to NXP's line of integrated audio codecs designed for high-quality audio processing. It combines analog front-end capabilities with digital signal processing features, targeting applications that demand precise audio handling and flexible interface options within a compact QFP44 package.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Verify compatibility with existing circuit designs if considering alternatives, focusing on pinout and functional equivalence.

FAQ

What crystal frequency is required for the UDA1355H?

A 12.288 MHz crystal is required for the crystal oscillator and PLL circuit to generate standard audio sampling frequencies.

How many SPDIF input channels does the UDA1355H support?

The UDA1355H supports one of four selectable SPDIF input channels.

Can the UDA1355H operate without a microcontroller?

Yes, it can operate in static mode using control pins, although microcontroller mode offers full feature access.