PCM1841QRGERQ1

ADCs/DACs - Special Purpose Overview

The PCM1841-Q1 is a quad-channel, 32-bit audio analog-to-digital converter (ADC) designed for automotive applications. It supports simultaneous sampling of four differential analog channels with a full-scale input of 2 VRMS. The device achieves a dynamic range of 123 dB with the Dynamic Range Enhancer (DRE) enabled and 113 dB when disabled. It operates at sample rates up to 192 kHz and features an integrated phase-locked loop (PLL), microphone bias generator, and DC removal high-pass filter. Powered by a single 3.3V supply, it offers flexible TDM, I2S, or left-justified serial interfaces selectable via hardware pins.

ADCs/DACs - Special Purpose Feature Summary

• Quad-channel delta-sigma ADC with 123 dB dynamic range (DRE enabled) and -98 dB THD+N
• Supports 7.35 kHz to 192 kHz output data sample rates with 32-bit word length
• Hardware-selectable audio interface formats: 4-channel TDM, 2-channel TDM, I2S, or Left-Justified
• Integrated low-noise MICBIAS (1.6 µVRMS) and internal voltage regulators for single-supply operation

ADCs/DACs - Special Purpose Applications

• Telematics control units
• Automotive head units
• Digital cockpit processing units
• Automotive display modules

ADCs/DACs - Special Purpose Procurement Notes

Verify that the component meets AEC-Q100 qualification standards for automotive use. Confirm the package type is the 24-pin VQFN (RGE) with a 4.00mm x 4.00mm body size. Ensure the operating temperature range of –40°C to +125°C aligns with system requirements. Check for advance information status in documentation as specifications may be subject to change.

ADCs/DACs - Special Purpose Selection Notes

Select this model for systems requiring four independent differential audio inputs with high fidelity. It is suitable for far-field microphone recording due to its high dynamic range. Ensure the host processor supports the selected serial interface mode (TDM, I2S, or LJ) and clock frequencies up to 24.576 MHz in controller mode. Verify power supply constraints match the 3.3V AVDD and optional 1.8V/3.3V IOVDD requirements.

ADCs/DACs - Special Purpose Part Context

The PCM1841-Q1 belongs to the Burr-Brown™ audio ADC family from Texas Instruments. It is specifically engineered for space-constrained and cost-sensitive automotive audio systems. The device integrates front-end amplification, filtering, and conversion, reducing the need for external components compared to discrete solutions.

ADCs/DACs - Special Purpose Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.