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A3291KUA-T PDF预览

A3291KUA-T

更新时间: 2024-01-04 01:17:17
品牌 Logo 应用领域
急速微 - ALLEGRO 锁存器
页数 文件大小 规格书
8页 245K
描述
Chopper Stabilized, Precision Hall Effect Latches for Consumer and Industrial Applications

A3291KUA-T 数据手册

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A3290 and A3291  
Chopper Stabilized, Precision Hall Effect Latches for  
Consumer and Industrial Applications  
Features and Benefits  
Description  
Symmetrical switchpoints  
Resistant to physical stress  
Superior temperature stability  
Output short-circuit protection  
Operation from unregulated supply  
Reverse battery protection  
Solid-state reliability  
The A3290 and A3291 Hall effect latches are extremely  
temperature-stable and stress-resistant sensors, especially  
suited for operation over extended temperature ranges (up  
to 125°C). Superior high-temperature performance is made  
possible through Dynamic Offset Cancellation, which reduces  
the residual offset voltage normally caused by device package  
overmolding,temperaturedependencies,andthermalstress.The  
twodevicesareidenticalexceptfortheirmagneticswitchpoints.  
They are not intended for automotive applications.  
Small package size  
Bothdevicesinclude,onasinglesiliconchip,avoltageregulator,  
a Hall-voltage generator, a small-signal amplifier, chopper  
stabilization, a Schmitt trigger, and a short-circuit protected  
open-collector output to sink up to 25 mA. A south polarity  
magneticfieldofsufficientstrengthisrequiredtoturntheoutput  
on. A north polarity field of sufficient strength is necessary to  
turn the output off. An onboard regulator permits operation  
with supply voltages in the range of 4.2 to 24 volts.  
Packages: 3 pin SOT23W (suffix LH), and  
3 pin SIP (suffix UA)  
Twopackagestylesprovideamagneticallyoptimizedpackage  
for most applications. Type LH is a miniature SOT23W low-  
profile surface-mount package, and type UA is a three-pin  
ultramini SIP for through-hole mounting. Both packages are  
lead (Pb) free with 100% matte tin leadframe plating.  
Not to scale  
Functional Block Diagram  
VCC  
Regulator  
OUT  
Low-Pass  
Filter  
Amp  
Control  
Current Limit  
17  
GND  
A3290-DS  

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