STMicroelectronics STEVAL-MIC004V1

Overview

STEVAL-MIC004V1 from STMicroelectronics is a microphone evaluation daughterboard hosting four MP23ABS1 bottom-port analog MEMS microphones, each with -38 dBV ±1 dB sensitivity, 130 dBSPL acoustic overload point, and 64 dB SNR. It supports 1.52–3.6 V supply and draws only 120 µA per microphone, enabling low-power audio capture in compact embedded voice interfaces.

For engineers reviewing the STEVAL-MIC004V1 datasheet, STEVAL-MIC004V1 pinout, STEVAL-MIC004V1 application, or STEVAL-MIC004V1 equivalent, this board provides verified analog output routing, detachable single-mic PCBs for individual characterization, and direct interface capability to op-amp signal conditioning stages.

Technical Context

The STEVAL-MIC004V1 implements a fixed-gain, single-ended analog output architecture using four identical MP23ABS1 transducers mounted on independent breakout sections. Each microphone features a built-in ASIC for impedance conversion and delivers rail-to-rail analog voltage output referenced to VDD and GND.

All four channels share a common 6-pin header (J1) with dedicated VDD, GND, and individual OUT lines - enabling simultaneous multi-channel acquisition or selective channel testing without cross-talk. No onboard amplification or digital processing is included; output signals require external op-amp buffering or ADC input conditioning.

Key Specifications

Availability

STEVAL-MIC004V1 is available at Aetrix Electronics and suitable for voice interface validation, multi-mic beamforming prototyping, and MEMS microphone parameter benchmarking requiring stable component supply and traceable STMicroelectronics sourcing.

Supply support for STEVAL-MIC004V1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, MEMS, power, and microcontroller solutions for industrial, automotive, and consumer applications.

This board belongs to ST's STEVAL (ST Evaluation) series, developed specifically to accelerate customer evaluation of ST's MEMS audio sensors through modular, solderable, and electrically isolated microphone coupon layouts.

FAQ

What is the electrical interface of each MP23ABS1 on STEVAL-MIC004V1?

Each MP23ABS1 outputs a single-ended analog voltage signal referenced to VDD and GND. The board routes each OUT pin independently to J1 pins 2, 3, 5, and 6. No internal biasing or AC coupling is applied - external DC blocking capacitors and op-amp input biasing must be added per channel.

Can the four microphone sections be used simultaneously with one ADC?

Yes - all four analog outputs are electrically isolated and can be sampled in parallel using a multi-channel ADC. However, simultaneous sampling requires external multiplexing or independent ADC inputs, as the board provides no clock synchronization or time-aligned sampling circuitry.

Is STEVAL-MIC004V1 RoHS and REACH compliant?

Yes - the board complies with RoHS Directive 2011/65/EU and is WEEE compliant. All components, including the MP23ABS1 microphones and passive elements, meet STMicroelectronics' standard environmental compliance requirements as documented in DB3777 Rev 1.

Does STEVAL-MIC004V1 include onboard signal conditioning or filtering?

No - the board provides raw analog outputs only. There is no onboard amplifier, anti-alias filter, or high-pass/low-pass network. Signal conditioning (e.g., gain, offset correction, or band-limiting) must be implemented externally using discrete op-amps or integrated audio codecs.