CJMCU-219 INA219 I2C Interface No Drift Bi-directional Current / Power Supply Monitoring Module

Description:

CJMCU-219 INA219 I2C Interface No Drift Bi-directional Current / Power Supply Monitoring Module

Introducing the CJMCU-219 INA219 I2C Interface Bi-directional Current/Power Monitoring Module—now available at the best price exclusively from Robu, the official reseller in India. This module comes fully equipped with everything you need to get started.

The CJMCU-219 integrates a zero-drift, bi-directional current and power monitoring IC with an I2C interface. Powered by the INA219 chip, it offers industry-leading precision and a compact form factor. It monitors voltage drop across a shunt resistor, senses the supply voltage, and calculates power, making it a highly efficient solution for power monitoring.

This breakout board simplifies power monitoring tasks, eliminating the need for multiple multimeters. With the INA219 chip, you can easily measure both high-side voltage and DC current draw over I2C, achieving 1% precision.

The device is built using the SOT23 package, providing a small, low-cost solution ideal for applications in servers, notebooks, power supplies, battery management, digital electric vehicles, and telecommunications equipment.

A precision amplifier measures voltage across a 0.1, 1% sense resistor, with a maximum input difference of ±320mV, allowing the module to measure currents up to ±3.2A. The internal 12-bit ADC offers a resolution of 0.8mA at the ±3.2A range. For lower currents, the module can measure down to ±400mA with 0.1mA resolution when the gain is set to div8. Advanced users can even replace the 0.1-ohm sense resistor with their own to adjust the current range, for example, using a 0.01-ohm resistor to measure up to 32A with 8mA resolution.

The INA219 operates within a temperature range of -40°C to +85°C, with a maximum accuracy error of just 1% and a maximum offset of 100μV. Its high precision and 12-bit resolution help minimize voltage drop across the shunt resistor, delivering accurate and reliable power measurements.

Circuit Diagram Compatible with Arduino and Display :

INA219 other important features include:

• Calibration programmable registers can directly read its unit of measure is the ampere current, and power in watts per reading.
• For as many as 128 samplings averaging, in order to realize filter in the noise environment.
• The I2C interface has a timeout, not only can avoid the bus lock, but also can provide high-speed mode, meet the communication requirements of up to 3.4 MHz.
• All features are supported software programmable INA219.
• Using a single power supply, the working voltage is between + 3.0 to + 5.5 V.

Features :

• 0.1 ohm 1% 2W current sense resistor
• Up to +26V target voltage
• Up to ±3.2A current measurement, with ±0.8mA resolution
• 0.9″ x 0.8″ PCB
• PCB (no header or terminal block): 1.9g
• Senses Bus Voltages from 0 to 26 V
• 2C- or SMBus-compatible interface. The
• Reports Current, Voltage, and Power
• 16 Programmable Addresses
• Filtering Options
• Calibration Registers
• SOT23-8 and SOIC-8 Packages

Specification:

Package Includes :

• 1 x CJMCU-219 INA219 Power Supply Monitoring Module

Attachments:

INA 219 datasheet

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