INA381-Q1
- Qualified for Automotive Applications
- AEC-Q100 Qualified With the Following Results:
- Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
- Functional Safety-Capable
- Common-mode input range: –0.2 V to +26 V
- High accuracy amplifier:
- Offset voltage at TA = 25°C
- 500 µV (maximum) at VCM = 12 V
- 150 µV (maximum) at VCM = 0 V
- Offset voltage drift: 1 µV/°C (maximum)
- Gain error: 1% (maximum) at 25°C
- Gain error drift: 20 ppm/°C (maximum)
- Offset voltage at TA = 25°C
- Available amplifier gains:
- INA381A1-Q1: 20 V/V
- INA381A2-Q1: 50 V/V
- INA381A3-Q1: 100 V/V
- INA381A4-Q1: 200 V/V
- Open-drain comparator:
- Hysteresis: 50 mV
- Propagation delay: 400 ns (typical)
- Alert threshold set through external reference voltage
- Supports transparent and latching modes
- Package: VSSOP-10
The INA381-Q1 includes both a 26-V common-mode, current-sensing amplifier and a high-speed comparator. This device detects overcurrent conditions by measuring the voltage developed across a current-shunt resistor and comparing that voltage to a user-defined threshold limit set by the comparator reference pin. The current-shunt monitor can measure differential voltage signals on common-mode voltages that vary from –0.2 V up to 26 V, independent of the supply voltage.
The open-drain alert output can be configured to operate in two modes: transparent or latched. In transparent mode, the output status follows the input state. In latched mode, the alert output is cleared only when the latch is reset. The standalone comparator large-signal alert response time is less than 2 µs, allowing for quick detection of overcurrent events. The total system overcurrent protection response time provided by the INA381-Q1 is less than 10 µs.
This device operates from a single 2.7-V to 5.5-V supply, drawing a maximum supply current of 350 µA. The device is specified over an operating temperature range of –40°C to +125°C, and is available in the 10-pin VSSOP 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 | INA381-Q1 AEC-Q100, 26-V, 350-kHz Current Sense Amplifier With Integrated Overcurrent Comparator datasheet (Rev. A) | PDF | HTML | 2021/3/23 | ||
| 應用說明 | Using a PCB Copper Trace as a Current Sense Shunt Resistor (Rev. A) | PDF | HTML | 2026/4/27 | |||
| 應用說明 | Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers | PDF | HTML | 2024/11/18 | |||
| Application brief | Measuring Current To Detect Out-of-Range Conditions (Rev. D) | PDF | HTML | 2022/3/10 | |||
| Application brief | Measuring Current for Handle Multiple Out-of-Range Conditions (Rev. C) | PDF | HTML | 2021/10/4 | |||
| 功能安全資訊 | INA381-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA (Rev. A) | PDF | HTML | 2020/10/23 | |||
| Application brief | Bidirectional, Low-Side Phase Current Sensing With Onboard Overcurrent Detection (Rev. D) | 2019/3/6 | ||||
| Circuit design | Overcurrent event detection circuit | 2018/7/31 | ||||
| Application brief | Low-Drift, Low-Side Current Measurements for Three-Phase Systems (Rev. B) | 2017/9/5 |
設計與開發
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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VSSOP (DGS) | 10 | Ultra Librarian |