INA219AIDR

Current Regulation/Management Overview

The INA219AIDR is a current shunt and power monitor manufactured by Texas Instruments, housed in an 8-pin SOIC package. It features an I2C or SMBus-compatible interface with 16 programmable addresses. The device monitors bus voltage from 0V to 26V and shunt voltage drops of ±40mV. Powered by a single 3V to 5.5V supply, it draws a maximum quiescent current of 1mA. It provides a 16-bit ADC for high-precision measurements, supporting direct reading of current and calculated power via internal multipliers.

Current Regulation/Management Feature Summary

• Integrated 16-bit analog-to-digital converter enables high-resolution measurement of both shunt voltage drop and bus supply voltage simultaneously.
• Built-in digital multipliers allow direct calculation of power consumption in watts based on measured current and voltage data.
• Supports bidirectional current sensing through an I2C or SMBus compatible interface with multiple programmable address options.

Current Regulation/Management Applications

• Battery management systems
• Power over Ethernet (PoE) monitoring
• Industrial process controls

Current Regulation/Management Procurement Notes

Verify the specific suffix 'IDR' corresponds to the tape-and-reel packaging format rather than tube packaging. Confirm that the A-grade accuracy specification meets the design requirements, as B-grade variants offer tighter tolerances. Ensure the SOIC-8 footprint matches the target PCB layout dimensions.

Current Regulation/Management Selection Notes

Select this component when precise power monitoring is required alongside standard current sensing capabilities. The integrated digital processing reduces external microcontroller load by handling conversion and multiplication tasks internally. Consider the 26V common-mode range suitability for the specific system rail voltages being monitored.

Current Regulation/Management Part Context

This part belongs to the INA219 family of current sense amplifiers designed for low-side and high-side monitoring applications. Unlike basic amplifiers, it integrates ADC and digital logic to provide calibrated output values directly via serial communication interfaces.

Current Regulation/Management Replacement Considerations

INA219BIDCNR offers higher precision specifications compared to the A-grade variant. INA219AID provides the same electrical characteristics but in a different physical package configuration.