INA745AIRELR-Texas Instruments-Price, Stock & Datasheet

The INA745x 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 ±39.32A with common-mode voltage support from –0.1V to +40V.

The INA745x 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 INA745x 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 50µs to 4.12ms as well as sample averaging from 1x to 1024x, which further helps reduce the noise of the measured data.

Low loss integrated shunt resistor
- Internal resistance: 800µΩ, TA = 25°C
- Continuous current: ±35A, TA = 25°C
- Peak measurement capability: ±39.32A
Current monitoring accuracy: A/B Grade (maximum)
- Offset current: ±6.25mA / ±62.5mA
- Offset drift: ±30µA/°C (A and B Grades)
- System gain error: ±0.75% / ±1.25%
- Common-mode rejection: ±0.125 / ±1.25mA/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
2.94MHz high-speed I2C interface with 16 pin-selectable addresses
Operates from a 2.7V to 5.5V supply:
- Operational current: 640µA (typical)
- Shutdown current: 5µA (maximum)