TEXAS INSTRUMENTS INA219AIDCNR High-Side Current Shunt & Power Monitor SOT-23-8

The TEXAS INSTRUMENTS INA219AIDCNR is a sophisticated high-side current shunt and power monitor integrated circuit, featuring an I²C interface for seamless digital communication. It provides precise monitoring of both shunt voltage drop and supply voltage, with fully programmable conversion times and filtering options to suit diverse application requirements. A key advantage is its programmable calibration value, which, when combined with an internal multiplier, allows for direct readouts of current in amperes, simplifying system design and data interpretation. An additional multiplying register autonomously calculates power in watts, delivering comprehensive energy monitoring capabilities.

The device supports bus voltage sensing from 0 to 26V, making it versatile for a wide range of low-voltage systems. It operates from a single +3V to +5.5V supply, with a maximum supply current draw of just 1mA, ensuring minimal impact on the host system's power budget. The I²C interface is enhanced with 16 programmable addresses, enabling the use of multiple monitors on the same bus for complex multi-channel systems. The INA219 is offered in two performance grades (A and B), with the B grade providing higher accuracy and precision.

Key Applications

This current sense amplifier is engineered for precision measurement and power management in demanding electronic environments. Its combination of accuracy, programmability, and a compact SOT-23-8 package makes it an ideal solution for designers.

Core Specifications

• Device Type: High-Side Current Shunt & Power Monitor
• Interface: I²C with 16 Programmable Addresses
• Sensed Bus Voltage Range: 0 to +26V
• Supply Voltage Range: +3V to +5.5V
• Programmable Features: Conversion Times, Filtering, Calibration
• Direct Readouts: Current (Amperes), Voltage, Power (Watts)
• Gain Bandwidth Product: 3.4 MHz