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A3150LT PDF预览

A3150LT

更新时间: 2024-10-29 22:38:47
品牌 Logo 应用领域
急速微 - ALLEGRO 开关斩波器
页数 文件大小 规格书
12页 101K
描述
PROGRAMMABLE, CHOPPERSTABILIZED, HALL-EFFECT SWITCH

A3150LT 数据手册

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3150  
PROGRAMMABLE, CHOPPER-  
STABILIZED, HALL-EFFECT SWITCH  
The A3150JLT and A3150JUA programmable switches provide  
tooth/valley recognition in large gear-tooth sensing applications. Each  
sensor consists of a single element, chopper-stabilized Hall-effect IC  
that can be programmed to the desired magnetic switch point, opti-  
mizing sensor airgap and timing accuracy performance after final  
packaging. The small package can be easily assembled and used in  
conjunction with a wide variety of gear/target shapes and sizes. The  
two devices differ only in package style.  
PTCT  
V
CC  
The sensing technology used for this sensor is Hall-effect based.  
The sensor incorporates a single-element Hall IC that switches in  
response to magnetic signals created by a ferrous target. The program-  
mability of the circuit eliminates magnet and system offsets such as  
those caused by tilt yet provides zero-speed detection capabilities  
without the associated running jitter inherent in classical digital solu-  
tions.  
1
2
3
A proprietary dynamic offset cancelation technique, with an  
internal high-frequency clock, reduces the residual offset voltage,  
which is normally caused by device overmolding, temperature  
dependancies, and thermal stress. This technique produces devices that  
have an extremely stable quiescent output voltage, are immune to  
mechanical stress, and have precise recoverability after temperature  
cycling. Many problems normally associated with low-level analog  
signals are minimized by having the Hall element and amplifier in a  
single chip. Output precision is obtained by internal gain adjustments  
during the manufacturing process and operate-point programming in the  
user’s application.  
Dwg. PH-003-2  
PRELIMINARY INFORMATION  
(subject to change without notice)  
April 12, 1999  
ABSOLUTE MAXIMUM RATINGS  
This sensor system is ideal for use in gathering speed, position, and  
timing information using gear-tooth-based configurations. The  
A3150JLT/JUA are particularly suited to those applications that require  
accurate duty cycle control or accurate edge detection. The lower  
vibration sensitivity also makes these devices extremely useful for  
transmission speed sensing.  
at TA = 25°C  
Supply Voltage, VCC ........................... 26.5 V  
Reverse Supply Voltage, VRCC ............ -30 V  
Overvoltage Supply Current, ICC ..... 100 mA  
Magnetic Flux Density, B ............ Unlimited  
Output Current, IOUT ..... Internally Limited  
Output OFF Voltage, VOUT ................. 26.5 V  
Reverse Output Current, IROUT ......... -50 mA  
Operating Temperature Range,  
Continued next page  
Always order by complete part number: the prefix 'A' + the basic four-digit  
part number + a suffix to indicate operating temperature range +  
a suffix to indicate package style, e.g., A3150JLT .  
TA ............................... -40°C to +115°C  
Storage Temperature, TS ................... +170°C  

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