PCMD3180IRTWT

ADCs/DACs - Special Purpose Overview

The PCMD3180IRTWT is an octal-channel pulse-density-modulation (PDM) input to time-division multiplexing (TDM) or I²S output converter manufactured by Texas Instruments. It supports simultaneous sampling of up to eight digital PDM microphone channels with a dynamic range of 127 dB using high-performance 5th order PDM inputs, and 117 dB with 4th order inputs. The device features programmable digital volume control (-100 dB to 27 dB), gain calibration (0.1 dB resolution), and phase calibration (163 ns resolution). It operates on a single supply of 1.8 V or 3.3 V, supports output sample rates from 8 kHz to 768 kHz, and includes integrated PLL, programmable HPF, biquad filters, and low-latency filter modes.

ADCs/DACs - Special Purpose Feature Summary

• Octal-channel PDM input conversion with 127 dB dynamic range (5th order) and 117 dB (4th order)
• Programmable digital volume control (-100 dB to 27 dB), gain calibration (0.1 dB), and phase calibration (163 ns)
• Supports TDM, I²S, and left-justified audio formats with word lengths of 16, 20, 24, or 32 bits
• Integrated microphone bias voltage generation, PLL, programmable HPF, and biquad digital filters

ADCs/DACs - Special Purpose Applications

• Video doorbell systems
• Smart speakers
• Building security gateways
• IP network cameras
• GPS personal navigation devices
• Video conference systems

ADCs/DACs - Special Purpose Procurement Notes

Verify the RTW suffix corresponds to the 24-pin WQFN package with a 4.00mm × 4.00mm footprint and 0.5mm pitch. Confirm that the operating environment stays within the specified -40°C to +125°C temperature range. Ensure power supply rails match the 1.8V or 3.3V requirements for both AVDD and IOVDD. Check that the host controller supports either I²C or SPI for device configuration.

ADCs/DACs - Special Purpose Selection Notes

Select this component when eight simultaneous PDM microphone channels are required in space-constrained designs. Choose based on the need for high dynamic range (127 dB) and flexible audio interface options (TDM/I²S/LJ). Consider the integrated signal processing features like biquad filters and low-latency modes if post-processing resources are limited. Verify compatibility with the target system's clocking architecture and voltage levels.

ADCs/DACs - Special Purpose Part Context

The PCMD3180 is part of Texas Instruments' family of PDM-to-TDM/I²S converters, designed for far-field microphone recording applications. It complements other audio CODECs and processors by handling multi-channel PDM digitization and preprocessing. The device integrates analog and digital functions to reduce external component count, making it suitable for compact consumer electronics and IoT audio devices.

ADCs/DACs - Special Purpose Replacement Considerations

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