INA219BIDCNT

Current Regulation/Management Overview

The INA219BIDCNT is a bidirectional current and power monitor manufactured by Texas Instruments. It features a Zero-Drift architecture with an input offset voltage of 50 µV and accuracy of ±0.5%. The device monitors bus voltages from 0 V to 26 V and shunt voltages up to ±40 mV. Powered by a single 3 V to 5.5 V supply, it draws a maximum operating current of 1 mA. Communication is handled via an I²C interface with 16 programmable addresses. It operates within a temperature range of -40°C to +125°C and is housed in an SOT-23-8 package.

Current Regulation/Management Feature Summary

• Zero-drift amplifier technology ensures high precision without external calibration
• Integrated digital multiplier for direct power calculation
• Bidirectional sensing capability for both sourcing and sinking currents

Current Regulation/Management Applications

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

Current Regulation/Management Procurement Notes

Verify the specific suffix 'CNT' against official Texas Instruments documentation to confirm packaging configuration. Ensure the selected variant matches the required sensitivity and accuracy specifications for the target application. Cross-reference the manufacturer part number with authorized distributors to validate authenticity and availability status.

Current Regulation/Management Selection Notes

Select this component when high DC accuracy is critical due to its zero-drift characteristics. It is suitable for applications requiring precise measurement of low-side or high-side currents where thermal drift could compromise system performance. Consider the SOT-23-8 footprint constraints during PCB layout design.

Current Regulation/Management Part Context

This device belongs to the INA219 family of current and power monitors. It provides a digital output proportional to the sensed current and power, simplifying system design by eliminating the need for external microcontrollers to perform complex analog-to-digital conversions and calculations.

Current Regulation/Management Replacement Considerations

INA219AIDCNT

Current Regulation/Management FAQ

What is the maximum bus voltage supported?

The device supports a common-mode voltage range from 0 V to 26 V.

How does the Zero-Drift feature benefit measurements?

It minimizes input offset voltage drift over temperature, maintaining accuracy without requiring frequent recalibration.