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INA780B
  • INA780B
  • INA780B

INA780B

ACTIVE

85-V 16-bit I²C-output digital power monitor with 400-µΩ EZShunt™ Technology

Texas Instruments INA780B Product Info

1 April 2026 3

Parameters

Common-mode voltage (max) (V)

85

Common-mode voltage (min) (V)

-0.1

Continuous current (max) (A)

75

Input offset current (±) (max) (mA)

125

Input offset current drift (±) (typ) (µA/°C)

10

Gain error (%)

0.4

Supply voltage (max) (V)

5.5

Supply voltage (min) (V)

2.7

Iq (max) (mA)

1

Digital interface

I2C

Resolution (Bits)

16

Features

Alert Function, Bidirectional, Digital Temp Monitor, Integrated Power Monitor, Integrated Shunt, Low-side Capable, Standard precision

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Package

VSON (DEK)-15-See data sheet

Features

  • Low loss integrated shunt resistor
    • Internal resistance: 400 µΩ, TA = 25°C
    • Continuous current: ±75 A, TA = 25°C
    • Peak measurement capability: ±78.64 A
  • Current monitoring accuracy: A/B Grade, maximum
    • Offset current: ±12.5 mA / ±125 mA
    • Offset drift: ±50 µA/°C (A and B Grades)
    • System gain error: ±0.75% / ±1.25%
    • Common-mode rejection: ±0.25 / ±2.5 mA/V
  • 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
  • Temperature sensor: ±1.5°C (maximum at 25°C)
  • Precision oscillator: ±0.5% (maximum at 25°C)
  • Programmable conversion time and averaging
  • 2.94-MHz high-speed I2C interface with 16 pin-selectable addresses
  • Operates from a 2.7-V to 5.5-V supply:
    • Operational current: 640 µA (typical)
    • Shutdown current: 5 µA (maximum)
  • Low loss integrated shunt resistor
    • Internal resistance: 400 µΩ, TA = 25°C
    • Continuous current: ±75 A, TA = 25°C
    • Peak measurement capability: ±78.64 A
  • Current monitoring accuracy: A/B Grade, maximum
    • Offset current: ±12.5 mA / ±125 mA
    • Offset drift: ±50 µA/°C (A and B Grades)
    • System gain error: ±0.75% / ±1.25%
    • Common-mode rejection: ±0.25 / ±2.5 mA/V
  • 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
  • Temperature sensor: ±1.5°C (maximum at 25°C)
  • Precision oscillator: ±0.5% (maximum at 25°C)
  • Programmable conversion time and averaging
  • 2.94-MHz high-speed I2C interface with 16 pin-selectable addresses
  • Operates from a 2.7-V to 5.5-V supply:
    • Operational current: 640 µA (typical)
    • Shutdown current: 5 µA (maximum)

Description

The INA780x is a digital power monitor with an integrated current sensing element along with a 16-bit delta-sigma ADC specifically designed for current-sensing applications. The device can measure full-scale currents up to ±78.64 A with common-mode voltage support from –0.1 V to +85 V.

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

The low offset and gain drift design of the INA780x allows the device to be used in precise systems that do not undergo multi-temperature calibration during manufacturing.

The device allows for selectable ADC conversion times from 50 µs to 4.12 ms as well as sample averaging from 1x to 1024x, which further helps reduce the noise of the measured data.

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