AAP803A3

Overview

The Microchip Technology AAP803A3 is a chip-scale electret condenser microphone preamplifier designed for small form factor applications. It operates on a supply voltage range of 1.5V to 5V with a typical quiescent current of 125µA at 1.6V. The device provides two fixed gain settings: 16dB via the FB1 pin and 26dB via the FB2 pin. It features low input capacitance (0.7pF) and low output impedance (<30Ω). Input noise is specified at less than 1.3µV RMS (A-weighted). The unit utilizes a 6-bump X2CSP package measuring 0.8mm x 0.6mm.

Feature Summary

• Optimized for integration into small diameter two-terminal electret microphones
• Provides selectable mid and high gain configurations through external feedback pins
• Supports high pass, low pass, and band pass filtering using external components
• Includes ESD protection rated at a minimum of 7.5kV at the output

Applications

• Small diameter electret microphone assemblies
• Battery-powered audio recording devices
• Voice recognition modules
• Portable consumer electronics

Procurement Notes

Verify that the specific part number matches the required gain configuration, as the A3 variant differs from the A1 version. Confirm the packaging type aligns with production volume needs, as options include tape and reel or waffle pack. Ensure compliance with RoHS2 and halogen-free standards if required by the final assembly specifications.

Selection Notes

Select this component when space constraints require a chip-scale package for microphone integration. Choose the AAP803A3 specifically over the A1 variant if only mid and high gain settings are necessary for the application. Consider the low input capacitance and low noise performance for sensitive audio capture requirements in portable devices.

Part Context

This device belongs to the AAP803Ax series of electret condenser microphone preamplifiers manufactured by Microsemi Corporation, now part of Microchip Technology. The series includes the AAP803A1 and AAP803A3 variants, both designed for low power consumption and high performance in compact audio applications.

Replacement Considerations

The AAP803A1 is a direct functional alternative within the same series, offering three gain settings instead of two. Verify compatibility regarding gain requirements and package dimensions before substitution.

FAQ

How is the gain setting configured on the AAP803A3?

Gain is set by connecting the signal path to either the FB1 pin for 16dB gain or the FB2 pin for 26dB gain.

What is the maximum voltage rating for any pin on the AAP803A3?

The absolute maximum voltage on any pin is 2.5V.