INA791A
- 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
- High small signal bandwidth : 1MHz
- 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
- System Gain error (maximum)
- Adjustable gain with external resistor divider network: 20mV/A to 400mV/A
- Open-drain temperature alert at TJ of 160°C
The INA791x is a voltage output, current sense amplifier with an integrated shunt resistor of 400µΩ. The INA791x 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.
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.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | INA791x –4V to 110V, Bidirectional, Ultra-Precise, High Bandwidth Current Sense Amplifier With 75A EZShunt Technology datasheet (Rev. A) | PDF | HTML | 2025/7/29 | ||
| 功能安全資訊 | INA79X-Q1 Functional Safety FIT Rate, FMD and Pin FMA | PDF | HTML | 2025/12/5 | |||
| 應用說明 | Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers | PDF | HTML | 2024/11/18 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
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。
ANALOG-ENGINEER-CALC — PC software analog engineer's calculator
類比工程師的計算機旨在加速類比電路設計工程師定期使用的許多重複計算。此基於 PC 的工具提供圖形介面，列出各種常見計算，從使用回饋電阻器設定運算放大器增益到選擇適當的電路設計元件以穩定類比數位轉換器 (ADC) 驅動緩衝電路。
除了作為獨立工具使用外，此計算機還與類比工程師口袋參考中描述的概念相得益彰。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VSON (DEK) | 15 | Ultra Librarian |