PCM1821IRTER

ADCs/DACs - Special Purpose Overview

The PCM1821IRTER is a stereo audio analog-to-digital converter (ADC) manufactured by Texas Instruments. It features two converters with a resolution of 32 bits and supports sampling rates up to 192 kHz. The device operates within a power supply voltage range of 3 V to 3.6 V, consuming approximately 21.3 mW of power. Key performance metrics include a signal-to-noise ratio (SNR) of 106 dB and total harmonic distortion plus noise (THD+N) of -95 dB. It is housed in a WQFN-20 package and is designed for automotive applications, functioning as a stereo channel Burr-Brown audio ADC.

ADCs/DACs - Special Purpose Feature Summary

• Stereo audio ADC with 32-bit resolution and 192 kHz maximum sampling rate
• High performance metrics: 106 dB SNR and -95 dB THD+N
• Automotive qualified with an operating temperature range of -40°C to +125°C
• Low power consumption of 21.3 mW at 3.3 V

ADCs/DACs - Special Purpose Applications

• Automotive audio systems
• Car infotainment units
• Vehicle navigation displays

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'I' indicates the industrial/automotive temperature grade (-40°C to +125°C) compared to other variants. Confirm the WQFN-20 package dimensions against PCB footprint requirements. Ensure the design supports the 3 V to 3.6 V supply voltage range. Check for moisture sensitivity level compliance during storage and reflow soldering processes.

ADCs/DACs - Special Purpose Selection Notes

Select this component when automotive-grade reliability and high-fidelity audio conversion are required. Compare SNR and THD+N specifications against PCM1822 if higher dynamic range is needed. Verify interface compatibility, as the PCM1821 utilizes standard digital audio interfaces. Consider the 21.3 mW power consumption for battery-constrained or thermally limited automotive environments.

ADCs/DACs - Special Purpose Part Context

The PCM1821 belongs to the PCM18xx series of audio ADCs from Texas Instruments. It is part of the Burr-Brown product line, known for high-performance audio components. The 'IRTER' suffix denotes the specific temperature rating, package type (WQFN-20), and tape-and-reel packaging format suitable for surface-mount assembly.

ADCs/DACs - Special Purpose Replacement Considerations

PCM1822QRTERQ1 offers similar functionality but with a higher SNR of 117 dB. PCM1809IRTER is another alternative with comparable resolution and sampling rates but slightly lower SNR (104 dB). Verify pinout and register compatibility before substituting.