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Product Detailed Parameters
- Description：ANALOG MICROPHONE -42DB 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：-42dB ±1dB @ 94dB SPL
- S/N Ratio：59dB
- Impedance：300 Ohms
- Voltage Range：1.6 V ~ 3.6 V
- Current - Supply：122 µA
- Port Location：Top
- Ratings：-
- Termination：Solder Pads
- Size / Dimension：0.148" L x 0.116" W (3.76mm x 2.95mm)
- Height (Max)：0.047" (1.20mm)
- Shape：Rectangular
- Grade：-
- Qualification：-
- Voltage - Rated：2 V
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Overview
The PUI Audio AMM-3742-2-T is an analog MEMS microphone featuring a sensitivity of -42 dB and a signal-to-noise ratio of 59 dB. It operates at a supply voltage of 2 VDC with a current consumption of 200 uA. The device has a 300 ohm impedance and covers a frequency range from 100 Hz to 20 kHz. Physical dimensions are 3.76 mm in length, 2.95 mm in width, and 1.1 mm in depth. It functions within a temperature range of -40°C to +85°C.
Feature Summary
- Utilizes dedicated preamplifier ASIC for high dynamic range performance
- Offers low distortion and high acoustic overload point
- Designed for surface mount assembly and high-temperature reflow soldering
Applications
- Security monitoring equipment including glass break detection
- Industrial machine monitoring for predictive maintenance
- Consumer electronics and smart IoT devices
Procurement Notes
Verify the specific suffix 'T' against the manufacturer's official documentation to confirm tape-and-reel packaging configuration. Ensure the 2VDC operating voltage aligns with target circuit designs. Confirm RoHS compliance status through the latest datasheet revision before finalizing procurement orders.
Selection Notes
Select this component when a compact analog MEMS solution with low power consumption is required. The 2VDC operation suits battery-powered applications. The 59 dB SNR provides adequate audio fidelity for voice recognition tasks. Verify that the 100 Hz lower frequency cutoff meets application requirements compared to wider-range alternatives.
Part Context
This part belongs to the AMM series of analog MEMS microphones manufactured by PUI Audio. These components integrate a capacitive audio sensor with specialized ASIC technology. The series emphasizes small footprint design suitable for modern electronic assemblies requiring reliable sound capture.
Replacement Considerations
The AMM-3742-T-R is a related variant offering similar electrical characteristics but operates at 1.5VDC with a 58 dB SNR. Engineers must verify voltage compatibility and package orientation differences when considering substitution.
