INA745B-Q1

활성

800µΩ EZShunt™ 기술을 지원하는 AEC-Q100, 40V 16비트 I²C 출력 디지털 전원 모니터

제품 상세 정보

Common-mode voltage (max) (V) 40 Common-mode voltage (min) (V) -0.1 Continuous current (max) (A) 35 Input offset current (±) (max) (mA) 62.5 Input offset current drift (±) (typ) (µA/°C) 5 Gain error (%) 0.1 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 Automotive Operating temperature range (°C) -40 to 125
Common-mode voltage (max) (V) 40 Common-mode voltage (min) (V) -0.1 Continuous current (max) (A) 35 Input offset current (±) (max) (mA) 62.5 Input offset current drift (±) (typ) (µA/°C) 5 Gain error (%) 0.1 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 Automotive Operating temperature range (°C) -40 to 125
VQFN (REL) 14 15 mm² (5 mm × 3 mm)
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • 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)
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • 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)

The INA745x-Q1 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-Q1 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-Q1 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.

The INA745x-Q1 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-Q1 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-Q1 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.

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기술 자료

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3개 모두 보기
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* 데이터 시트 INA745x-Q1 AEC-Q100, 40V , 16 -Bit, Precision I2C Output Digital Power Monitor With EZShunt Technology datasheet (Rev. A) PDF | HTML 2025. 10. 3
기능 안전 정보 INA74X-Q1 Functional Safety FIT Rate, FMD and Pin FMA (Rev. A) PDF | HTML 2025. 5. 8
애플리케이션 노트 Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers PDF | HTML 2024. 11. 18

설계 및 개발

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계산 툴

ANALOG-ENGINEER-CALC — PC software analog engineer's calculator

아날로그 엔지니어의 계산기는 아날로그 회로 설계 엔지니어가 정기적으로 사용하는 많은 반복 계산의 속도를 높이도록 설계되었습니다. 이 PC 기반 툴은 피드백 저항을 사용한 연산 증폭기 게인 설정부터 아날로그-디지털 컨버터(ADC) 드라이브 버퍼 회로 안정화를 위한 적절한 회로 설계 요소 선택에 이르기까지 다양한 일반적인 계산 목록이 포함된 그래픽 인터페이스를 제공합니다.

이 계산기는 독립 실행형 툴로 유용할 뿐만 아니라 아날로그 엔지니어의 포켓 레퍼런스에 설명된 개념과도 잘 어울립니다.

지원되는 제품 및 하드웨어
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주문 및 품질

지원 및 교육

TI 엔지니어의 기술 지원을 받을 수 있는 TI E2E™ 포럼

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