TPA5050RSAR

Overview

The TPA5050RSAR is a stereo digital audio lip-sync delay device manufactured by Texas Instruments, originally developed under the National Semiconductor brand. It operates on a single 3V to 3.6V supply with a typical current consumption of 3 mA at 48 kHz sampling frequency. The component accepts a single serial audio input and provides delayed output via I2C control. Key specifications include a maximum delay of 170 ms per channel at 48 kHz, support for 16- to 24-bit audio formats (I2S, Right-Justified, Left-Justified), and 5V-tolerant I/O. It utilizes a 16-pin QFN package.

Feature Summary

• Stereo digital audio delay up to 170 ms/channel at fs = 48 kHz
• I2C bus control with selectable slave addresses via ADDx pins
• Supports 16-, 18-, 20-, and 24-bit I2S, Right-Justified, and Left-Justified formats
• 5V tolerant inputs for DATA, LRCLK, BCLK, SCL, and SDA

Applications

• High Definition TV lip-sync delay
• Flat panel TV lip-sync delay
• Home theater rear-channel effects
• Wireless speaker front-channel synchronization

Procurement Notes

Verify the manufacturer designation as Texas Instruments, which acquired National Semiconductor. Confirm the specific ordering suffix 'R' indicates reel packaging and 'A' denotes RoHS compliance. Ensure the 16-VQFN exposed pad thermal connection requirements are met during assembly.

Selection Notes

Select this component when precise sample-level audio delay is required for video synchronization. Ensure the system supports I2C communication for register configuration. Verify that the available delay range (up to 8191 samples) meets the specific lip-sync offset requirements of the target application.

Part Context

The TPA5050 is part of the TPA5050 series, which includes variants like the TPA5051 (four-channel) and TPA5052 (stereo). It serves as a specialized audio processor within Texas Instruments' portfolio for consumer electronics requiring digital audio timing adjustments.

Replacement Considerations

The TPA5051 offers four-channel delay capabilities. The TPA5052 provides stereo delay without I2C control. Check datasheets for pin compatibility and register map differences before substitution.

FAQ

How is the maximum delay time calculated?

The maximum delay is determined by the maximum number of samples (8191) divided by the sampling frequency. At 48 kHz, this results in approximately 170.65 ms.

What is the function of the Complete Update register?

The Complete Update register transfers user settings from the register file to the delay functional block simultaneously, preventing audio interruptions or pops during multi-register updates.

Can the TPA5050 operate without an external crystal?

Yes, the device generates all internal clocks from the incoming audio bit clock (BCLK), eliminating the need for an external oscillator.