INA750B
具有強化型 PWM 抑制的 110V、35A 整合式分流、高精密電流感測放大器
INA750B
- Precision design with integrated shunt resistor
- ±35A continuous current at 25°C
- ±25A continuous current from at 125°C
- Shunt resistor: 800µΩ
- Shunt inductance: 2.5nH
- 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: ±0.4%, ±40ppm/°C drift
- Version B: ±1%, ±100ppm/°C drift
- Offset current (maximum)
- Version A: ±20mA, ±35mA over temperature
- Version B: ±105mA, ±125mA over temperature
- System Gain error (maximum)
- Adjustable gain with external resistor divider network: 40mV/A to 800mV/A
- Open-drain temperature alert at TJ of 160°C
The INA750x is a voltage output, current sense amplifier with an integrated shunt resistor of 800µΩ. The INA750x 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 ±40ppm/°C, and an optimized layout for the sensing resistor.
The INA750x is designed with enhanced PWM rejection circuitry to suppress disturbances 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 applications
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 14-pin VQFN package.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 日期 |
|---|---|---|---|---|
| * | Data sheet | INA750x –4V to 110V, Bidirectional, Ultra-Precise, Current Sense Amplifier With Enhanced PWM Rejection and 35A EZShunt Technology datasheet (Rev. A) | PDF | HTML | 2025年 11月 12日 |
| Functional safety information | INA75X-Q1 Functional Safety FIT Rate, FMD and Pin FMA | PDF | HTML | 2025年 11月 11日 | |
| Application brief | Precision Current Sensing in Humanoid Robots | PDF | HTML | 2025年 6月 30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 | |
| Certificate | INA750BEVM EU Declaration of Conformity (DoC) | 2024年 10月 31日 |
設計與開發
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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VQFN (REM) | 14 | Ultra Librarian |