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Product Detailed Parameters
- Description：ANALOG MICROPHONE -38DB 1.6VDC
- Series：AMM
- Mfr：PUI Audio, Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：MEMS (Silicon)
- Output Type：Analog
- Direction：Omnidirectional
- Frequency Range：100 Hz ~ 20 kHz
- Sensitivity：-38dB ±1dB @ 94dB SPL
- S/N Ratio：63dB
- Impedance：300 Ohms
- Voltage Range：1.6 V ~ 3.6 V
- Current - Supply：110 µA
- Port Location：Top
- Ratings：-
- Termination：Solder Pads
- Size / Dimension：0.108" L x 0.073" W (2.75mm x 1.85mm)
- Height (Max)：0.039" (1.00mm)
- Shape：Rectangular
- Grade：-
- Qualification：-
- Voltage - Rated：2 V
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Overview
The AMM-2738-3-B is an analog MEMS microphone manufactured by PUI Audio, Inc. It features a sensitivity of -38 dB and a signal-to-noise ratio (SNR) of 63 dB. The device operates within a frequency range of 100 Hz to 20 kHz with an impedance of 400 ohms. Electrical specifications include a supply current of 110 uA and a working voltage of 2 VDC. The component supports an operating temperature range from -40°C to +85°C. Its physical dimensions are 2.75 mm in length and 0.9 mm in depth, packaged in an SMD-3 configuration.
Feature Summary
- Utilizes silicon MEMS technology for compact audio sensing
- Provides analog output signals for direct processing
- Designed for low power consumption applications
- Supports wide operational temperature environments
Applications
- Voice recognition systems
- Consumer electronic devices
- Portable audio recording equipment
- Smart home voice assistants
Procurement Notes
Verify the specific suffix 'B' against the manufacturer's latest datasheet to confirm pinout compatibility and RoHS status. Ensure that the 2V operating voltage aligns with the target circuit design. Cross-reference the SMD-3 package footprint with PCB layout requirements before finalizing procurement orders to prevent assembly errors.
Selection Notes
Select this component when a small form factor is required alongside moderate noise performance. The 110 uA current draw makes it suitable for battery-powered devices. Compare the 63 dB SNR against higher-performance alternatives if background noise suppression is critical. Verify that the 100 Hz lower frequency cutoff meets the application's bass response needs.
Part Context
This part belongs to the AMM series of analog MEMS microphones from PUI Audio. It shares the same 2.75 mm length dimension as other variants in the family but differs in electrical characteristics and package type. It serves as a specialized option for space-constrained designs requiring analog interface capabilities.
Replacement Considerations
The AMM-2738-2-B is a documented alternative within the same product line. Both share identical physical dimensions and package type. Differences exist in sensitivity (-38 dB vs -38 dB), SNR (63 dB vs 65 dB), and supply current (110 uA vs 150 uA). Verify these electrical distinctions against system requirements before substitution.
