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STMicroelectronics STEVAL-MKI242A

Name: STEVAL-MKI242A
Brand: STMicroelectronics
SKU: STEVAL-MKI242A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STEVAL-MKI242A

Manufacturer:: STMicroelectronics

Category:: Expansion Boards, Daughter Cards

Package:

Datasheet:: STEVAL-MKI242A.pdf

Description:: STEVAL-MKI242A

Quantity:: RFQ Add To RFQ list

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Inventory:4,543

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Product details

Overview

STEVAL-MKI242A from STMicroelectronics is a DIL24-socket adapter board designed to evaluate the ST1VAFE6AX biosensor, featuring a vertical analog front-end (vAFE) for biopotential signal acquisition and integrated 6-axis IMU with AI-enabled sensor fusion. It includes on-board decoupling capacitors for VDD and VDDIO, supports ECG cable connection via 3.5 mm phone jack, and is validated for use with STEVAL-MKI109V3, STEVAL-MKI109D, STEVAL-MKBOXPRO, and X-NUCLEO-IKS4A1 evaluation platforms.

For engineers reviewing the STEVAL-MKI242A datasheet, STEVAL-MKI242A pinout, STEVAL-MKI242A application, or STEVAL-MKI242A equivalent, key considerations include DIL24 socket compatibility, vAFE signal conditioning capability, biopotential measurement readiness, and interoperability with ST's MEMS Studio GUI and STM32-based sensor bridges.

Technical Context

The STEVAL-MKI242A implements a passive signal interface between the ST1VAFE6AX biosensor and host evaluation platforms, providing full pin access including analog inputs (ANA1/TDMout, ANA2/BCLK), digital interfaces (I²C: SDA/SCL; SPI: CS/SDO), interrupt outputs (INT1/INT2), and power domains (VDD, VDDIO, VCM). It integrates TSU114 rail-to-rail op-amps for input buffering and LD39015M12R LDO for stable 1.2 V supply to the sensor core.

No microcontroller or firmware resides on the board; it functions strictly as a breakout and conditioning adapter. Signal integrity is maintained via matched RC networks (4.7 MΩ/470 nF) for high-impedance biopotential inputs and ESD protection (ESDALCL5-1BM2) on all external I/O lines.

Key Specifications

Parameter	Value and Actual Design Meaning
DIL24 Socket	Standard 24-pin dual in-line footprint enabling plug-and-play integration with ST's MEMS evaluation motherboards.
vAFE Interface	Direct access to ST1VAFE6AX's vertical analog front-end pins (ANA1, ANA2, VCM) for biopotential signal acquisition without external signal chain redesign.
Power Conditioning	On-board LD39015M12R LDO delivers regulated 1.2 V to VDD; 2.2 µF + 1 µF ceramic decoupling ensures low-noise operation of the vAFE core.
Input Protection	Three ESDALCL5-1BM2 diodes protect SDA, SCL, and CS lines against ±15 kV HBM ESD events per IEC 61000-4-2 Level 4.
Analog Input Network	Matched 4.7 MΩ/470 nF RC filters on IN+ and IN− paths provide 68 Hz cutoff and DC bias stabilization for ECG-grade biopotential capture.
Interface Compatibility	Fully supports I²C (SDA/SCL) and SPI (CS/SDO) protocols used by ST1VAFE6AX; INT1/INT2 routed for asynchronous event notification to host MCU.

Availability

STEVAL-MKI242A is available at Aetrix Electronics and suitable for remote patient monitoring systems, clinical-grade wearable biosensors, biopotential research prototypes, and AI-augmented inertial-biosignal fusion applications requiring stable component supply and rapid evaluation turnaround.

Supply support for STEVAL-MKI242A 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, Switzerland, specializing in MEMS sensors, microcontrollers, power management, and automotive ICs.

The STEVAL-MKI242A belongs to ST's Professional MEMS Tools product line, engineered to accelerate development of biometric and inertial sensing systems by providing standardized, software-supported hardware interfaces for ST's intelligent sensor portfolio.

FAQ

Does STEVAL-MKI242A include firmware or require programming?

No. The board contains no microcontroller or flash memory and does not run firmware. It is a passive adapter that routes and conditions signals between the ST1VAFE6AX sensor and an external host platform such as STEVAL-MKI109V3. All configuration and data processing occur on the host MCU or PC using MEMS Studio or custom software.

What ECG cable connector type is supported?

The STEVAL-MKI242A requires a standard 3.5 mm TRS (tip-ring-sleeve) phone jack cable for biopotential signal input. The board's JP2 header provides IN+ and IN− connections compatible with common ECG electrode leads, and the VCM reference is internally biased via resistor network (R17/R18/R19).

Can STEVAL-MKI242A operate standalone without an evaluation motherboard?

No. It lacks power regulation for all voltage domains (e.g., no VDDIO generation), clock source, communication interface logic, or data acquisition capability. It must be mated with a supported host platform-STEVAL-MKI109V3, STEVAL-MKI109D, STEVAL-MKBOXPRO, or X-NUCLEO-IKS4A1-to provide power, digital control, and data streaming.

Which software tools support STEVAL-MKI242A?

MEMS Studio v5.10+ (downloadable from st.com) fully supports STEVAL-MKI242A when used with STEVAL-MKI109V3 or STEVAL-MKI109D. The GUI enables real-time biopotential waveform visualization, register configuration, sensor fusion tuning, and export of time-stamped CSV data for offline analysis.

STEVAL-MKI242A Specifications

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Manufacturer:: STMicroelectronics

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Product Status:: Active

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STEVAL-MKI242A FAQ

1.How can I place an order for STEVAL-MKI242A through Aetrix?

Please submit a Request for Quotation (RFQ) for STEVAL-MKI242A 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-MKI242A reliable?

The price and inventory of STEVAL-MKI242A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STEVAL-MKI242A is usually 5 days.

3.What payment methods are accepted for STEVAL-MKI242A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STEVAL-MKI242A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STEVAL-MKI242A?

STEVAL-MKI242A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STEVAL-MKI242A 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-MKI242A?

For technical support, including STEVAL-MKI242A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STEVAL-MKI242A requirements.

6.How does Aetrix verify that STEVAL-MKI242A is sourced from the original manufacturer or authorized distributors?

All STEVAL-MKI242A 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-MKI242A meets industry standards.

7.What is the process for return or replacement of STEVAL-MKI242A?

All STEVAL-MKI242A units undergo pre-shipment inspection (PSI). If there is an issue with STEVAL-MKI242A, 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-MKI242A part is unused and in its original packaging.

Return procedure for STEVAL-MKI242A:

1.Submit a request within 90 days.

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

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