Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Development Boards, Kits, Programmers > Evaluation Boards > Expansion Boards, Daughter Cards

STMicroelectronics STEVAL-MKI139V5

Name: STEVAL-MKI139V5
Brand: STMicroelectronics
SKU: STEVAL-MKI139V5
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: STEVAL-MKI139V5

Manufacturer:: STMicroelectronics

Category:: Expansion Boards, Daughter Cards

Package:

Datasheet:: STEVAL-MKI139V5.pdf

Description:: COUPON BOARD MP23AB01DH

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,253

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

STEVAL-MKI139V5 from STMicroelectronics is a microphone coupon evaluation board hosting four MP23AB01DH fully differential analog bottom-port MEMS microphones, each operating from 2.3–3.6 V, delivering 65 dB SNR, 135 dBSPL acoustic overload point, and -38 dBFV ±1 dBV sensitivity. It enables parallel acoustic performance validation in compact audio front-end prototyping for voice interface and far-field capture systems.

For engineers reviewing the STEVAL-MKI139V5 datasheet, STEVAL-MKI139V5 pinout, STEVAL-MKI139V5 application, or STEVAL-MKI139V5 equivalent, key selection criteria include differential analog output compatibility, board-level decoupling layout (1 µF + 100 nF + 270 pF), coupon detachability for individual microphone testing, and RoHS-compliant PCB construction per DB3252 Rev 2.

Technical Context

The board implements four independent MP23AB01DH transducers wired with dedicated 1 µF bulk and 100 nF ceramic bypass capacitors per channel, plus 270 pF AC-coupling caps on each differential output pair. Each microphone features a fully differential analog interface with GND1-referenced output stage and operates within 100 Hz–10 kHz flat frequency response.

No shared supply rail switching or digital control logic is present - the design is strictly passive signal routing and analog conditioning. The CON6 header (J1) exposes all four OUT+/OUT− pairs and common VDD/GND1 terminals, supporting direct oscilloscope or ADC front-end connection without level shifting.

Key Specifications

Parameter	Value and Actual Design Meaning
Microphone Count	4 independent MP23AB01DH units, each on detachable PCB segment for isolated characterization
Supply Voltage	2.3–3.6 V DC per microphone - supports single-rail LDO or battery-powered test setups
SNR	65 dB A-weighted - enables high-fidelity voice capture in low-noise embedded audio preprocessing
Acoustic Overload Point	135 dBSPL - maintains linearity under loud transient sounds (e.g., claps, alarms)
Sensitivity	-38 dBFS ±1 dBV - calibrated output level referenced to 1 V RMS into high-impedance load
THD @ 94 dBSPL	<0.2% at 1 kHz - ensures minimal harmonic distortion in speech-band signal chains

Availability

STEVAL-MKI139V5 is available at Aetrix Electronics and suitable for voice interface development, far-field beamforming validation, and MEMS microphone comparative testing requiring stable component supply and documented reference layouts.

Supply support for STEVAL-MKI139V5 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 MKI evaluation platform family, engineered specifically to accelerate audio sensor integration by providing validated analog signal paths, mechanical decoupling, and standardized coupon-based test methodology for MEMS microphone qualification.

FAQ

What is the purpose of the detachable PCB segments on STEVAL-MKI139V5?

Each MP23AB01DH microphone is mounted on a mechanically separable coupon PCB segment. This allows individual acoustic characterization - including sensitivity matching, SNR measurement, and THD validation - without cross-channel interference or shared PCB resonance effects. Detachment preserves solder joint integrity and enables reuse in custom carrier boards.

Can STEVAL-MKI139V5 be used with single-ended ADC inputs?

No - the MP23AB01DH outputs are fully differential analog signals (OUT+ and OUT−). Direct connection to single-ended ADCs requires external instrumentation amplifiers or differential-to-single-ended converters. The board provides no on-board conversion circuitry; its J1 header delivers native differential pairs only.

What is the role of the 270 pF capacitor on each output pair?

The 270 pF capacitor serves as an AC-coupling element between each MP23AB01DH output and the J1 header pins. It blocks DC offset from the microphone's internal bias while preserving full audio-band signal integrity (100 Hz–10 kHz), ensuring compatibility with downstream differential receivers that require DC-free inputs.

Does STEVAL-MKI139V5 include power regulation or filtering beyond the specified capacitors?

No - the board contains only passive components: four 1 µF bulk capacitors (C2), four 100 nF ceramic bypass capacitors (C1), and four 270 pF AC-coupling capacitors (C3). There is no voltage regulator, ESD protection diode array, or RF filter. Users must supply clean, regulated 2.3–3.6 V externally via J1.

STEVAL-MKI139V5 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Packaging:: Bulk

Product Status:: Obsolete

Platform:: -

Type:: Audio

Function:: Microphone

Utilized IC / Part:: MP23AB01DH

Contents:: Board(s)

STEVAL-MKI139V5 FAQ

1.How can I place an order for STEVAL-MKI139V5 through Aetrix?

Please submit a Request for Quotation (RFQ) for STEVAL-MKI139V5 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for STEVAL-MKI139V5 reliable?

The price and inventory of STEVAL-MKI139V5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STEVAL-MKI139V5 is usually 5 days.

3.What payment methods are accepted for STEVAL-MKI139V5?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STEVAL-MKI139V5 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STEVAL-MKI139V5?

STEVAL-MKI139V5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STEVAL-MKI139V5 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for STEVAL-MKI139V5?

For technical support, including STEVAL-MKI139V5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STEVAL-MKI139V5 requirements.

6.How does Aetrix verify that STEVAL-MKI139V5 is sourced from the original manufacturer or authorized distributors?

All STEVAL-MKI139V5 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STEVAL-MKI139V5 meets industry standards.

7.What is the process for return or replacement of STEVAL-MKI139V5?

All STEVAL-MKI139V5 units undergo pre-shipment inspection (PSI). If there is an issue with STEVAL-MKI139V5, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The STEVAL-MKI139V5 part is unused and in its original packaging.

Return procedure for STEVAL-MKI139V5:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…