INA740B Series
85-V 16-bit I²C-output digital power monitor with 800-µΩ EZShunt™ Technology
Manufacturer: Texas Instruments
Catalog
85-V 16-bit I²C-output digital power monitor with 800-µΩ EZShunt™ Technology
Key Features
• Low loss integrated shunt resistorInternal resistance: 800 µΩ, TA = 25°CContinuous current: ±35 A, TA = 25°CPeak measurement capability: ±39.32 ACurrent monitoring accuracy: A/B Grade, maximumOffset current: ±6.25 mA / ±62.5 mAOffset drift: ±30 µA/°C (A and B Grades)System gain error: ±0.75% / ±1.25%Common-mode rejection: ±0.125 / ±1.25 mA/VPower monitoring accuracy: A/B Grade, maximum±0.9% / ±1.6% at 25°C, full scaleEnergy and charge accuracy: A/B Grade, maximum±1.4% / ±2.1% at 25°C, full scaleTemperature sensor: ±1.5°C (maximum at 25°C)Precision oscillator: ±0.5% (maximum at 25°C)Programmable conversion time and averaging2.94-MHz high-speed I2C interface with 16 pin-selectable addressesOperates from a 2.7-V to 5.5-V supply:Operational current: 640 µA (typical)Shutdown current: 5 µA (maximum)Low loss integrated shunt resistorInternal resistance: 800 µΩ, TA = 25°CContinuous current: ±35 A, TA = 25°CPeak measurement capability: ±39.32 ACurrent monitoring accuracy: A/B Grade, maximumOffset current: ±6.25 mA / ±62.5 mAOffset drift: ±30 µA/°C (A and B Grades)System gain error: ±0.75% / ±1.25%Common-mode rejection: ±0.125 / ±1.25 mA/VPower monitoring accuracy: A/B Grade, maximum±0.9% / ±1.6% at 25°C, full scaleEnergy and charge accuracy: A/B Grade, maximum±1.4% / ±2.1% at 25°C, full scaleTemperature sensor: ±1.5°C (maximum at 25°C)Precision oscillator: ±0.5% (maximum at 25°C)Programmable conversion time and averaging2.94-MHz high-speed I2C interface with 16 pin-selectable addressesOperates from a 2.7-V to 5.5-V supply:Operational current: 640 µA (typical)Shutdown current: 5 µA (maximum)
Description
AI
The INA740x 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 ±39.32 A with common-mode voltage support from –0.1 V to +85 V.
The INA740x 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 INA740x 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.
The INA740x 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 ±39.32 A with common-mode voltage support from –0.1 V to +85 V.
The INA740x 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 INA740x 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.
