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霍爾效應傳感器 - US1881
原名
Hall-Effect Sensor - US1881 (Latching)
貨號
COM-09312
特價
31
資料來源：https://www.sparkfun.com/products/9312
The US1881 is an integrated Hall-Effect latched sensor. That’s nice but what does it do? Holding a magnet near the sensor will cause the output pin to toggle. This makes for a robust presence sensor. A reed sensor also works nicely, but can be limited by the glass encapsulation and size. A Hall-Effect sensor is much smaller, but can handle less current than a reed switch.
The device includes an on-chip Hall voltage generator for magnetic sensing, a comparator that amplifies the Hall voltage, and a Schmitt trigger to provide switching hysteresis for noise rejection, and open-collector output. An internal bandgap regulator is used to provide temperature compensated supply voltage for internal circuits and allows a wide operating supply range.
If a magnetic flux density larger than threshold Bop, DO is turned on (low). The output state is held until a magnetic flux density reversal falls below Brp causing DO to be turned off (high).
Features:
- 3.5V to 24V DC operation voltage
- Low current consumption
- Temperature compensation
- Wide operating voltage range
- Open-Collector pre-driver
- 50mA maximum sinking output current
- Reverse polarity protection
- Lead Free Package: TO-92
Documents:
Videos
該US1881是一個集成霍爾效應傳感器鎖存。這很好，但它有什麼作用？握住傳感器附近的磁鐵將導致輸出引腳切換。這使得一個強大的存在傳感器。幹簧傳感器也工作得很好，但可以通過玻璃封裝和大小的限制。霍爾效應傳感器小很多，但可以處理比簧片開關電流少。
該裝置包括用於磁敏片上霍爾電壓發生器，該放大霍爾電壓的比較器，和一個施密特觸發器，以提供噪聲抑制開關滯後，和集電極開路輸出。一個內部帶隙調節器用於提供內部電路的溫度補償電壓，並允許一個寬的工作電壓範圍。
如果磁通密度大於閾波普較大，DO接通（低）。輸出狀態保持到磁通密度逆轉低於BRP導致DO被關閉（高）。
特徵：
- 3.5V至24V的直流工作電壓
- 低電流消耗
- 溫度補償
- 工作電壓範圍寬
- 集電極開路預驅動器
- 50毫安那顆最大輸出電流
- 反極性保護
- 無鉛封裝：TO-92
文件：
