7Semi INA238 DC Current Voltage Power Monitor Module Qwiic I2C

The 7Semi INA238 Current, Voltage and Power Monitoring Breakout Board is a high-precision digital power measurement module designed for monitoring DC current, bus voltage, power consumption, and internal sensor temperature. Built around the Texas Instruments INA238, it features a 16-bit ADC, an onboard 10mOhm shunt resistor, and an I2C communication interface for accurate power monitoring.

The module supports bus voltage measurements up to 85V and selectable shunt voltage ranges of +/-40.96mV and +/-163.84mV. It also provides programmable conversion times, sample averaging, and alert functionality for flexible monitoring applications.

Featuring two Qwiic connectors, a screw terminal block, and accessible I2C and alert connections, the board is suitable for integration with compatible microcontrollers and embedded systems.

Ideal for battery monitoring, robotics, DC power supplies, industrial equipment, and energy measurement applications.

Key Features

• High-Precision Power Monitoring: Measures DC current, bus voltage, power, and internal sensor temperature using a 16-bit delta-sigma ADC.

• High Current Measurement Accuracy: Features +/-5uV maximum input offset voltage and +/-0.1% maximum gain error for precise shunt voltage measurements.

• Low Temperature Drift: Offers +/-0.02uV/deg C maximum offset drift and +/-25ppm/deg C maximum gain error drift.

• High Common-Mode Rejection: Provides 140dB minimum CMRR for reliable measurements across a wide common-mode voltage range.

• Accurate Power Monitoring: Supports +/-0.7% maximum full-scale power measurement error from -40 to +125 deg C at the IC level.

• Wide Bus Voltage Range: Measures bus voltages from 0V to 85V, with a common-mode input range of -0.3V to +85V.

• 10mOhm Shunt Resistor: Features an onboard 0.010 Ohm current-sensing resistor for differential current measurements.

• Selectable Shunt Voltage Range: Supports +/-40.96mV and +/-163.84mV full-scale measurement ranges.

• Low Input Bias Current: Features 2.5nA maximum input bias current for minimal measurement loading.

• Fast Alert Response: Supports alert response times as low as 75us for rapid monitoring and fault detection.

• Integrated Temperature Monitoring: Includes an internal temperature sensor with +/-1 deg C maximum accuracy at 25 deg C.

• Programmable Measurement Settings: Supports ADC conversion times from 50us to 4.12ms and averaging from 1 to 1024 samples.

• High-Speed I2C Interface: Supports I2C communication speeds up to 2.94MHz at the IC level.

• Four Configurable I2C Addresses: Supports 0x45 (default), 0x40, 0x41, and 0x44 through onboard A0 and A1 solder jumpers.

• Dual Qwiic Connectors: Provides two 4-pin Qwiic connectors for convenient I2C integration.

• 3-Pin Screw Terminal: Features IN+, VBUS, and IN- terminals for current and bus voltage sensing.

• Programmable Alert Output: Supports configurable monitoring thresholds and conversion-ready notifications.

• Low-Power Operation: Features 640uA typical operating current and 5uA maximum shutdown current at the IC level.

• Compact Board Design: Features a 24 x 21 mm PCB with four mounting holes for easy installation.

Items Included:

• 1 x 7Semi INA238 Current and Voltage Sensor Breakout Board

• 1 x Pin Header Strip

Note: Qwiic cable is not included.

Datasheet

DXF File

Step file