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梅里克斯 MLX90217 可拆包裝

The MLX90217 is a self adjusting digital output rotary position gear tooth sensor designed for use in automotive camshaft sensing as well as other speed sensing applications. It is designed to be used with a bias magnet south facing the back (non-marked) side of the IC. The device has an open collector output which is short circuit protected.

The MLX90217 is a sophisticated IC featuring an on-chip 10-bit A/D Converter and logic that acts as a digital sample and hold circuit. A separate 4-bit A/D converter provides a fixed hysteresis. The 90217 does not have a chopper delay. The 90217 uses a single Hall plate which is immune to rotary alignment problems. The bias magnet can be from 50 to 400mT.

As the signal is sampled, the logic recognizes an increasing or decreasing flux density. The output will turn on (BOP) after the flux has reached its peak and decreased by an amount equal to the hysteresis. Similarly the output will turn off (BOP) after the flux has reached its minimum value and increased by an amount equal to the hysteresis.

MLX90217是一款自適應調(diào)整、數(shù)字輸出的旋轉(zhuǎn)位置齒輪傳感器,可應用于汽車凸輪軸傳感器以及其它速度傳感器。在應用時需要時磁鐵的南極面向芯片的底部(沒有標簽的面)。輸出是一個集電極開路,帶有短路保護。

MLX90217是一款高端芯片,具有一個片上10比特AD轉(zhuǎn)換器和與數(shù)字采樣、保持電路類似的邏輯。一個獨立的4比特的AD轉(zhuǎn)換器提供一定的滯后效應。MLX90217沒有斬波延遲。MLX90217使用單個霍爾,沒有旋轉(zhuǎn)對齊問題。磁鐵可以是50到400mT.

信號采樣時,會接收到增加或者減小的磁場強度。輸出會在場強到達最大和下降相當于滯后量時開路。同樣的,輸出會在場強到達最小和增加相當于滯后量時關閉。

 

特點和優(yōu)點
齒輪旋轉(zhuǎn)位置傳感器
短路保護
片上10比特A/D轉(zhuǎn)換
自適應調(diào)整磁場感應范圍
高速操作
無斬波延遲
可檢測零速度
無須考慮旋轉(zhuǎn)方向

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