TI intros industry’s most accurate current shunt solution

BANGALORE, INDIA: Texas Instruments Inc. (TI) has announced the industry’s
most accurate current shunt solution. With a maximum offset voltage of 10-microvolts (μV) and a maximum gain error of 0.1 percent, the INA226 is 10 times more accurate than leading competitors.

The device is a complete 16-bit, single-chip solution, and provides fully programmable measurements for current, voltage, and power across a digital I2C interface. The INA226 benefits designers working with servers, telecom equipment, computers, power management devices, and testing equipment, where accurate power measurements are crucial.

Key features and benefits
• Industry leading accuracy with a maximum offset voltage of 10-μV and maximum gain error of 0.1 percent results in greater precision at low currents and allows for smaller shunt resistors to be used, reducing I*R loss.
• Single-chip digital solution with I2C interface provides current, voltage, and power measurements, simplifying board design and layout constraints with no external mux or ADC required.
• Independently programmable conversion times and sample averaging make it easy to customize to the speed requirements of each system, and reduce software and memory requirements.
• Maximum quiescent current of 420-μA and maximum shutdown current of 2-μA results in efficient operation that consumes 3.5% less power than competitors’ discrete solutions, even with the INA226’s integrated ADC and power mux.
• 140-dB common mode rejection ratio (CMRR) and 36-V common mode voltage (CMV) ensure there is little to no change in offset voltage throughout the entire range of operation, simplifying error analysis.