A1469傳感器變送器的磁性傳感器-開(kāi)關(guān)（固態(tài)）規(guī)格書PDF中文資料

A1469屬于傳感器變送器的磁性傳感器-開(kāi)關(guān)（固態(tài)）。由Allegro MicroSystems制造生產(chǎn)的A1469磁性傳感器 - 開(kāi)關(guān)（固態(tài)）該系列產(chǎn)品使用固態(tài)技術(shù)來(lái)檢測(cè)是否存在超過(guò)某個(gè)特定幅度和/或標(biāo)示的磁場(chǎng)，并提供指示是否存在此類磁場(chǎng)的雙態(tài)輸出。它們與磁簧開(kāi)關(guān)以及線性或羅盤型固態(tài)器件不同，前者通過(guò)使用移動(dòng)機(jī)械部件來(lái)提供類似的功能，后者提供指示所施加磁場(chǎng)的強(qiáng)度和/或方向的可變輸出。

DESCRIPTION

The A1469 is an optimized Hall effect sensing IC that provides a user-friendly solution for digital ring-magnet sensing, or when coupled with a magnet, ferromagnetic target sensing, in three-wire applications. The small device package can be easily assembled into applications for use in conjunction with a wide variety of target shapes and sizes.

The integrated circuit incorporates dual Hall effect elements with a 2.2 mm spacing and signal processing that switches in response to differential magnetic signals created by ringmagnet poles. The circuitry contains a sophisticated digital circuit to reduce system offsets, to calibrate the gain for airgap–independent switchpoints, and to achieve true zero-speed operation. Signal optimization occurs at power-on through the combination of offset and gain adjust, and is maintained throughout the operating time with the use of a running-mode calibration. The running-mode calibration provides immunity to environmental effects such as micro-oscillations of the target or sudden air gap changes.

The device is ideally suited to obtaining speed and duty cycle information in ring-magnet–based speed, position, and timing applications, such as in speedometers.

The A1469 is available in a 4-pin SIP (suffix K) package. The package is lead (Pb) free, with 100 matte tin leadframe plating.

FEATURES AND BENEFITS

? Unique design for robustness against high power EMC transients

? Peak detection based switching algorithm for large operating air gaps

? Minimum differential field 20 Gpk-pk

? Running mode calibration for continuous optimization

? Precise duty cycle signal throughout operating temperature range

? Automatic Gain Control (AGC) for air-gap–independent switchpoints

? Automatic Offset Adjustment (AOA) for signal processing optimization

? True zero-speed operation

? Scan and IDDQ for increased test coverage