PCM5122PWR

ADCs/DACs - Special Purpose Overview

The PCM5122PWR is a stereo audio digital-to-analog converter (DAC) manufactured by Texas Instruments. It features a DirectPath output architecture that eliminates the need for external DC-blocking capacitors, generating a symmetric 2V RMS signal centered at ground. The device supports high-resolution audio with up to 384 kHz sampling rates and offers a typical Signal-to-Noise Ratio (SNR) of 112 dB. It integrates a programmable Phase-Locked Loop (PLL) for clock generation and fixed-function audio processing capabilities. The component operates on a single 3.3 V supply and is housed in a 28-pin TSSOP package.

ADCs/DACs - Special Purpose Feature Summary

• DirectPath Output: Eliminates external coupling capacitors using an internal charge pump for ground-centered 2V RMS output.
• High Performance: Delivers 112 dB SNR and dynamic range with 32-bit resolution and support for sampling rates up to 384 kHz.
• Integrated Clocking: Features a programmable PLL capable of generating DAC clocks from common master clocks like 12 MHz or 24 MHz.
• Audio Processing: Includes fixed-function miniDSP features such as digital filtering, dynamic range control, bass management, and EQ.

ADCs/DACs - Special Purpose Applications

• Consumer audio equipment requiring compact PCB layouts due to capacitor-free design.
• Automotive infotainment systems utilizing I2C/SPI configuration.
• Professional audio interfaces needing high-fidelity stereo conversion.

ADCs/DACs - Special Purpose Procurement Notes

Verify the suffix 'PWR' indicates the reel packaging format when sourcing. Confirm RoHS compliance status through official manufacturer documentation. Ensure the specific revision level matches the design requirements, as updates may occur without functional changes. Cross-reference the Mouser part number 595-PCM5122PWR for accurate distributor identification.

ADCs/DACs - Special Purpose Selection Notes

Select this component for designs prioritizing space savings by removing large output capacitors. It is suitable for applications requiring integrated clock synthesis to reduce BOM complexity. Compare against the PCM5121PWR if lower power consumption is critical, noting the PCM5122 offers higher SNR. Ensure the system can accommodate the 3.3 V supply voltage and TSSOP-28 footprint constraints.

ADCs/DACs - Special Purpose Part Context

The PCM5122PWR belongs to the PCM512x series of audio DACs from Texas Instruments. It shares architectural similarities with the PCM5121 but provides enhanced audio performance metrics. The 'PW' designation refers to the TSSOP-28 package, while 'R' denotes the tape-and-reel shipping method. This part is distinct from power management ICs like the LM5122 or wireless charging ICs like the BQ51222 which share numerical prefixes.

ADCs/DACs - Special Purpose Replacement Considerations

The PCM5122PW is the tube-packaged equivalent of the PCM5122PWR. For pin-compatible alternatives within the same family, refer to the PCM5121PWR, though it offers lower SNR specifications. No other cross-model substitutes are confirmed in public documentation.