Boardoza INA250A1 High Precision Current Sense Breakout Board

The Boardoza INA250A1 is a high-precision current-sense breakout board based on the Texas Instruments INA250A1 integrated current shunt monitor. It combines a precision differential amplifier and an internal 2 mΩ shunt resistor, enabling accurate current measurements with minimal external components.

This breakout board is suitable for both unidirectional and bidirectional current sensing applications. Making it ideal for power monitoring, energy management, motor control, battery systems, and industrial applications where accurate current measurement is critical.

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Front Side	Back Side

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Key Features

• High-Precision Current Shunt Monitor: Enables accurate current measurement.
• Integrated 2 mΩ Precision Shunt Resistor: Eliminates the need for an external shunt resistor.
• Bidirectional Measurement Support: Supports both unidirectional and bidirectional current measurement.
• Wide Supply Voltage Range: Compatible with wide supply voltage levels (2.7 Vdc to 36 Vdc).
• Analog Voltage Output: Allows easy interfacing with ADCs and microcontrollers.
• Low Power Consumption: Suitable for energy-efficient applications.
• Adjustable Reference Voltage (REF): Enables output offset adjustment for measurement flexibility.
• Maximum Input Current Capability: Supports current measurement up to 15 A (max).

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Technical Specifications

Model: INA250A1
Manufacturer: Boardoza
Manufacturer IC: Texas Instruments
Functions: Precision current sensing
Supply Voltage: 2.7 V – 36 V
Maximum Input Current: 15 A (Max)
Shunt Resistance: 2 mΩ (internal)
Gain: 200 mV/A
Output Type: Analog voltage
Measurement Type: Unidirectional / Bidirectional
Operating Temperature: -40 °C to +125 °C
Board Dimensions: 40 mm × 40 mm

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Board Pinout

( J1 ) Signal Connector

Pin Number	Pin Name	Description
1	VS	Device power supply (2.7 V – 36 V)
2	REF	Reference voltage input
3	OUT	Analog output voltage
4	GND	Ground

( J2 ) Current Path Connector

Pin Number	Pin Name	Description
1	IN+	Current sense input (supply side)
2	IN-	Current sense input (load side)

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Board Dimensions

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Step Files

Boardoza INA250A1.step

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Datasheet

INA250 Datasheet.pdf

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Version History

• V1.0.0 – Initial Release

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Support

• If you have any questions or need support, please contact [email protected]

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License

This repository contains both hardware and software components:

Hardware Design

All hardware design files are licensed under Creative Commons Attribution-ShareAlike 4.0 International License.

Software/Firmware

All software and firmware are licensed under BSD 3-Clause License.