Overview
The INA219BIDCNR is a high-side current shunt and power monitor with an I2C-compatible interface, designed to measure both shunt voltage drop and bus supply voltage. It provides digital readings of current, voltage, and power through an internal 12-bit ADC, supporting bus voltages from 0V to 26V.
Why Choose This Part
The device offers high accuracy with a maximum offset of 0.5 percent and handles bus voltages up to 26V independently of the 3V to 5.5V supply voltage. Its small SOT-23-8 footprint and low 0.7mA operating current make it ideal for space-constrained, power-sensitive designs.
Applications
Battery Management Systems
Monitoring charge and discharge cycles in portable electronics or battery packs with high precision.
Power Distribution Units
Tracking real-time power consumption across multiple rails in server or industrial backplanes.
Solar Charge Controllers
Measuring panel output and battery input currents to optimize energy harvesting efficiency.
Telecom Equipment
Monitoring current draw in high-reliability communications hardware operating on 12V or 24V rails.
Key Specifications
Accuracy
+/-0.5%
Function
Current Monitor
Mounting Type
Surface Mount
Package / Case
SOT-23-8
Sensing Method
High-Side
Voltage - Input
0V ~ 26V
Current - Output
10mA
Operating Temperature
-40degC ~ 125degC
Supplier Device Package
SOT-23-8
Getting Started
Engineers can evaluate this part using the INA219EVM evaluation module or by connecting the SOT-23-8 package to an I2C bus on an MCU like an Arduino or ESP32. Software development is simplified by numerous open-source libraries that handle the internal calibration register settings for direct current and power readouts.
Also Consider
INA226AIDGSR
TITexas Instruments
- Offers higher 16-bit resolution and a higher bus voltage rating up to 36V for more demanding industrial applications.
INA219AIDCNR
TITexas Instruments
- A lower-cost A-grade variant for applications where the 0.5 percent precision of the B-grade version is not strictly required.
