PCM1820QRTERQ1

ADCs/DACs - Special Purpose Overview

The PCM1820QRTERQ1 is a stereo-channel, 32-bit audio analog-to-digital converter (ADC) from Texas Instruments. It supports simultaneous sampling of two differential analog channels with a 2-V RMS full-scale input. The device operates at sample rates up to 192 kHz and features an integrated phase-locked loop (PLL), DC removal high-pass filter (HPF), and dynamic range enhancer (DRE). With DRE enabled, it achieves a typical SNR of 122 dB and a dynamic range of 123 dB. Power consumption is 19.6 mW/channel at 16 kHz and 21.3 mW/channel at 48 kHz under a single 3.3 V AVDD supply.

ADCs/DACs - Special Purpose Feature Summary

• Stereo ADC with 123-dB dynamic range (DRE enabled) and -95 dB THD+N
• Supports 8 kHz to 192 kHz sample rates with 32-bit resolution
• Integrated PLL, HPF, and digital/analog regulators for single-supply operation
• Hardware-configurable TDM or I2S serial interface in master or slave mode

ADCs/DACs - Special Purpose Applications

• Automotive Active Noise Cancellation
• Automotive Head Unit
• Rear Seat Entertainment
• Digital Cockpit Processing Unit
• Telematics Control Unit

ADCs/DACs - Special Purpose Procurement Notes

Verify the component designation includes the 'Q1' suffix to confirm automotive qualification status. Ensure the ordering suffix matches the required tape-and-reel packaging format. Confirm that the specific revision level aligns with current production data standards before finalizing procurement orders.

ADCs/DACs - Special Purpose Selection Notes

Select this model when hardware pin control is preferred over I2C configuration. Choose PCM1820-Q1 over PCM1821-Q1 if higher dynamic range (123 dB vs 106 dB) is required. Verify compatibility with the system's clock frequency requirements, as the integrated PLL supports a wide range of inputs up to 36.864 MHz.

ADCs/DACs - Special Purpose Part Context

This component belongs to the PCM182x-Q1 family, which shares a common 20-pin WQFN package and pinout. It serves as a drop-in replacement for PCM1821-Q1 and PCM1822-Q1 in designs requiring flexible hardware configuration. Unlike software-controlled variants, this part relies on physical pin states for feature selection.

ADCs/DACs - Special Purpose Replacement Considerations

PCM1821QRTERQ1 and PCM1822QRTERQ1 are pin-to-pin compatible replacements within the same family. Substitution requires verification of dynamic range specifications, as PCM1821 offers lower performance while PCM1822 provides intermediate specifications.