INA219AIDCNR High-Side Current and Power Monitor Texas Instruments

Overview of INA219AIDCNR

Die INA219AIDCNR is a precision power monitor with I2C interface capable of measuring shunt voltage, bus voltage, and current. Designed by Texas Instruments, this IC integrates a 12-bit delta-sigma ADC for high-accuracy measurements and includes internal calibration features to minimize offset errors.

Its high-side sensing design allows it to measure current in positive supply lines without disrupting the ground path, making it highly suitable for systems where ground disturbance must be minimized.

Why Choose INA219AIDCNR Over Alternatives?

Compared to traditional current shunt monitors that lack digital communication or require external ADCs, the INA219AIDCNR provides integrated digital monitoring over I2C. This reduces external components, improves measurement accuracy, and simplifies software development. Additionally, the low power consumption (only 1 mA typical) makes it ideal for portable and energy-sensitive designs.

Technical Parameters

• Hersteller: Texas Instrumente
• Model: INA219AIDCNR
• Funktion: High-side current and power monitor
• Interface: I2C (2-wire)
• ADC Resolution: 12-Bit
• Bus Voltage Range: 0 V to 26 V
• Shunt Voltage Range: ±320 mV
• Current Consumption: 1 mA (typ)
• Offset Voltage: ±100 μV (max)
• Package Type: SOT-23-8

Applications

• Battery-powered systems for energy monitoring
• Data acquisition in industrial automation equipment
• Embedded devices requiring current and power telemetry

Häufig gestellte Fragen (FAQ)

What makes the INA219AIDCNR suitable for battery-powered designs?

Its ultra-low power consumption and precise current measurement allow developers to monitor battery performance accurately without significantly affecting overall system power draw.

How does the INA219 reduce external component count?

By integrating a high-resolution ADC and offering I2C digital communication, it eliminates the need for external ADCs or amplifiers, simplifying design and reducing PCB area.

Can the INA219 be used in high-voltage systems?

Yes, it supports bus voltages up to 26 V, making it suitable for a wide range of industrial and consumer electronics applications that operate above standard logic levels.

What interface does the INA219 use?

The device uses a standard I2C interface, making it easy to integrate with microcontrollers and processors in embedded designs.

Does the INA219 support bidirectional current sensing?

Yes, the INA219 can sense both positive and negative currents through a shunt resistor, enabling flexible application across various power monitoring scenarios.