Texas Instruments Current Sense Amplifier High-Side SOIC-8

Texas Instruments Current Sense Amplifier is a high-side, bi-directional current shunt and power monitor designed for precision measurement across a wide 0 to 26 V common-mode voltage range. It uses a zero-drift architecture and operates from a single 3 V to 5.5 V supply.

Overview

The device monitors shunt voltage drop and bus supply voltage in real time through an I2C- or SMBus-compatible interface, which enables seamless integration into digital systems. Programmable conversion times and filtering allow the measurement behaviour to be tailored to application-specific noise and speed requirements.

Key Features

• Internal multiplier for direct current readouts in amperes, removing the need for complex external calculations
• Multiplying register for calculating power in watts, providing a complete power profiling solution
• 16 programmable addresses for monitoring multiple channels or devices on the same bus without address conflicts
• Programmable calibration supporting high accuracy

Performance

Critical performance metrics include a maximum gain error of 0.2%, a common-mode rejection ratio (CMRR) of 120 dB, and an accuracy of 0.5% maximum over the full operating temperature range. The maximum supply current is 1 mA, which supports low power consumption.

Package and Physical Details

The device operates across a temperature range of -40°C to 125°C and is presented in a compact, surface-mount SOIC-8 package, which suits space-constrained PCB designs. The supplied dimensions are 3.3 width, 1.5 depth and 4.3 height, with a weight of 0.272 gm. It is free from antimony and bromine (Sb/Br).

Applications

With its combination of high accuracy, flexible interface and robust feature set, this current sense amplifier is suited to precise energy management and to monitoring power rails across a range of voltages.