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Texas Instruments INA780x I2C-Output Digital Power Monitor

Texas Instruments INA780x I²C-Output Digital Power Monitor has an integrated current sensing element and a 16-bit delta-sigma ADC designed specifically for current-sensing applications. The device can measure full-scale currents up to ±78.64A with common-mode voltage support from –0.1V to +85V.

The Texas Instruments INA780x reports bus voltage, current, power, die temperature, energy, and charge accumulation while employing a precision ±0.5% integrated oscillator. This reporting is all done while performing the required calculations in the background. The integrated temperature sensor is ±2.5°C accurate over the junction temperature range.

Features

Low-loss integrated shunt resistor
- 400µΩ, T_A = 25°C internal resistance
- ±75A, T_A = 25°C continuous current
- ±78.64A peak measurement capability
Current monitoring accuracy (A/B Grade, maximum)
- ±12.5mA/±125mA offset current
- ±50µA/°C (A and B Grades) offset drift
- ±0.75%/±1.25% system gain error
- ±0.25/±2.5mA/V common-mode rejection
Power monitoring accuracy (A/B Grade, maximum)
- ±0.9%/±1.6% at 25°C, full scale

Energy and charge accuracy (A/B Grade, maximum)
- ±1.4%/±2.1% at 25°C, full scale
±1.5°C (maximum at 25°C) temperature sensor
±0.5% (maximum at 25°C) precision oscillator
Programmable conversion time and averaging
2.94MHz high-speed I²C interface with 16 pin-selectable addresses
Operates from a 2.7V to 5.5V supply
- 640µA (typical) operational current
- 5µA (maximum) shutdown current

Applications

Power delivery
Grid infrastructure
Industrial battery packs

Test equipment
Telecom equipment
Enterprise servers

Texas Instruments INA780x I2C-Output Digital Power Monitor

Features

Applications

Functional Block Diagram

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