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INA790A

現行

110V, 75ARMS integrated shunt, ultra-precision current sense amplifier with enhanced PWM rejection

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INA790A

現行
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產品詳細資料

Common-mode voltage (max) (V) 110 Common-mode voltage (min) (V) -4 Continuous current (max) (A) 75 Gain error (%) 0.05 CMRR (min) (dB) 160 Bandwidth (kHz) 1000 Supply voltage (max) (V) 5.5V Supply voltage (min) (V) 2.7 Features Analog Gain Set, Bidirectional, Enhanced PWM Rejection Rating Catalog Operating temperature range (°C) -40 to 125
Common-mode voltage (max) (V) 110 Common-mode voltage (min) (V) -4 Continuous current (max) (A) 75 Gain error (%) 0.05 CMRR (min) (dB) 160 Bandwidth (kHz) 1000 Supply voltage (max) (V) 5.5V Supply voltage (min) (V) 2.7 Features Analog Gain Set, Bidirectional, Enhanced PWM Rejection Rating Catalog Operating temperature range (°C) -40 to 125
VSON (DEK) 15 See data sheet
  • Precision design with integrated shunt resistor
    • ±75A continuous current at 25°C
    • ±50A continuous current at +125°C
    • Shunt resistor: 400µΩ
    • Shunt inductance: 2nH
  • Wide common-mode voltage range: –4V to +110V
  • Enhanced PWM rejection optimized for systems subject to switching common-mode voltages
    • Supports switching frequencies up to 125kHz
  • Excellent CMRR
    • 160dB DC CMRR
    • 114dB AC CMRR at 50kHz
  • High measurement accuracy
    • System Gain error (maximum)
      • Version A: ±0.35%, ±35ppm/°C drift
      • Version B: ±1%, ±100ppm/°C drift
    • Offset current (maximum)
      • Version A: ±40mA, ±70mA over temperature
      • Version B: ±210mA, ±250mA over temperature
  • Adjustable gain with external resistor divider network: 20mV/A to 400mV/A
  • Open-drain temperature alert at TJ of 160°C
  • Precision design with integrated shunt resistor
    • ±75A continuous current at 25°C
    • ±50A continuous current at +125°C
    • Shunt resistor: 400µΩ
    • Shunt inductance: 2nH
  • Wide common-mode voltage range: –4V to +110V
  • Enhanced PWM rejection optimized for systems subject to switching common-mode voltages
    • Supports switching frequencies up to 125kHz
  • Excellent CMRR
    • 160dB DC CMRR
    • 114dB AC CMRR at 50kHz
  • High measurement accuracy
    • System Gain error (maximum)
      • Version A: ±0.35%, ±35ppm/°C drift
      • Version B: ±1%, ±100ppm/°C drift
    • Offset current (maximum)
      • Version A: ±40mA, ±70mA over temperature
      • Version B: ±210mA, ±250mA over temperature
  • Adjustable gain with external resistor divider network: 20mV/A to 400mV/A
  • Open-drain temperature alert at TJ of 160°C

The INA790x is a voltage output, current sense amplifier with an integrated shunt resistor of 400µΩ. The INA790x is designed to monitor bidirectional current over a common-mode range of –4V to 110V, independent of the supply voltage. Adjustable gain option assists in optimizing the system dynamic range. The integration of the Kelvin connected shunt resistor with a zero-drift chopped amplifier provides calibration equivalent measurement accuracy, ultra-low temperature drift performance of ±35ppm/°C, and an optimized layout for the sensing resistor.

The INA790x is designed with enhanced PWM rejection circuitry to suppress disturbance from large (dv/dt) common-mode transients and enable real-time continuous current measurements in switching systems. The continuous measurements are critical for inline current measurements in a motor-drive application, and for solenoid valve control application.

This device operates from a single 2.7V to 5.5V power supply, drawing a maximum of 4.25mA of supply current. All versions are specified over the extended operating temperature range (–40°C to +125°C), and are available in a 15-pin VQFN package.

The INA790x is a voltage output, current sense amplifier with an integrated shunt resistor of 400µΩ. The INA790x is designed to monitor bidirectional current over a common-mode range of –4V to 110V, independent of the supply voltage. Adjustable gain option assists in optimizing the system dynamic range. The integration of the Kelvin connected shunt resistor with a zero-drift chopped amplifier provides calibration equivalent measurement accuracy, ultra-low temperature drift performance of ±35ppm/°C, and an optimized layout for the sensing resistor.

The INA790x is designed with enhanced PWM rejection circuitry to suppress disturbance from large (dv/dt) common-mode transients and enable real-time continuous current measurements in switching systems. The continuous measurements are critical for inline current measurements in a motor-drive application, and for solenoid valve control application.

This device operates from a single 2.7V to 5.5V power supply, drawing a maximum of 4.25mA of supply current. All versions are specified over the extended operating temperature range (–40°C to +125°C), and are available in a 15-pin VQFN package.
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* Data sheet INA790x –4V to 110V, Bidirectional, Ultra-Precise, Current Sense Amplifier With Enhanced PWM Rejection and 75A EZShunt Technology datasheet (Rev. B) PDF | HTML 2025年 7月 14日
Functional safety information INA79X-Q1 Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML 2025年 12月 5日
Application note Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers PDF | HTML 2024年 11月 18日

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INA79XXEVM — INA79xx 評估模組

INA79xx 評估模組 (EVM) 具有 INA790x -4V 至 110V、雙向、超精密、電流感測放大器，並採用 75A EZShunt™ 技術。INA79x 也具備增強 PWM 抑制。EVM 提供的平台有助於進行增益及參考電壓配置。

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