AAP149BS-M6B-G-LF-TR

Overview

The Microchip Technology AAP149BS-M6B-G-LF-TR is a chip-scale audio signal processor designed for small form factor two-terminal electret condenser microphones. It integrates a 4th order Sigma-Delta ADC with a 20kHz signal bandwidth and PDM output. The device operates on a supply voltage of 1.6V to 3.6V and features 20dB gain. It includes a sleep mode with quiescent current below 40µA, low input capacitance of 0.2pF typical, and stereo channel select capability via the L/R pin.

Feature Summary

• Integrated 4th Order Sigma-Delta ADC with 20kHz signal bandwidth and PDM output
• Low noise performance with 5µV RMS typical input-referred noise (A-weighted)
• Ultra-low input capacitance of 0.2pF typical
• Sleep mode with low quiescent current (< 40µA) automatically detected by clock frequency

Applications

• Small diameter electret microphones with digital output
• Pre-amplifier stages in audio systems
• Stereo audio applications requiring Left/Right channel selection

Procurement Notes

Verify that the ordering suffix -M6B-G-LF-TR corresponds to the Tape & Reel packaging containing 3500 devices per reel as specified in the datasheet. Confirm RoHS2 compliance and Halogen Free status. Ensure the supplier documentation matches the Microsemi Corporation part number AAP149BS-M6B-G-LF-TR.

Selection Notes

Select this component when integrating digital output directly into small diameter two-terminal electret condenser microphones. Ensure the application supports a clock frequency between 1MHz and 3MHz. Verify that the operating temperature range of -40°C to 85°C meets environmental requirements. Check that the 1.6V to 3.6V supply voltage aligns with system power constraints.

Part Context

The AAP149B series is an Electret Condenser Microphone Pre-Amplifier with Digital Output developed by Microsemi Corporation. The AAP149BS-M6B-G-LF-TR variant specifically denotes the tape and reel packaging format. This device is part of Microchip's portfolio for analog mixed-signal solutions, targeting compact audio input devices.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Evaluate alternatives based on matching package dimensions (6-XFBGA, CSPBGA), supply voltage range (1.6V-3.6V), and PDM interface compatibility.

FAQ

How is the sleep mode activated?

Sleep mode is automatically detected when the clock frequency falls below 100kHz.

What is the function of the L/R pin?

The L/R pin selects the channel; setting it low configures the device for the Left channel, while connecting it to VDD configures it for the Right channel.

What is the typical input-referred noise level?

The typical input-referred noise is 5µV RMS, measured A-weighted with the input shorted to ground.