参数资料
型号: ATS643LSH-I2
厂商: Allegro Microsystems Inc
文件页数: 12/16页
文件大小: 492K
描述: IC SENSOR GEAR TOOTH 4-SIP
标准包装: 800
传感范围: 65% 跳闸,35% 释放
类型: 专用型
电源电压: 4 V ~ 24 V
电流 - 电源: 8.4mA
输出类型: 数字,开路集电极
特点: 轮齿类型
工作温度: -40°C ~ 150°C
封装/外壳: 4-SIP
供应商设备封装: 4-SIP
包装: 散装
Self-Calibrating, Zero-Speed Differential
Gear Tooth Sensor IC with Continuous Update
ATS643LSH
11
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Power-On State Operation. The ATS643 is guaranteed to 
power-on in the high current state, I
CC(High)
.
Initial Edge Detection. The device self-calibrates using the 
initial teeth sensed, and then enters Running mode. This results
in reduced accuracy for a brief period (less than four teeth),
however, it allows the device to optimize for continuous update
yielding adaptive sensing during Running mode. As shown in
figure 5, the first three high peak signals are used to calibrate
AGC. However, there is a slight variance in the duration of
initialization, depending on what target feature is nearest the
package when power-on occurs.
Figure 5. Power-on initial edge detection. This figure demonstrates four typical power-on scenarios. All of these examples assume that the target is
moving relative to the package in the direction indicated. The length of time required to overcome Start Mode Hysteresis, as well as the combined effect
of whether it is overcome in a positive or negative direction plus whether the next edge is in that same or opposite polarity, affect the point in time when
AGC calibration begins. Three high peaks are always required for AGC calibration.
Target
(Gear)
Output
V
PROC
V
PROC
V
PROC
V
PROC
Output
Output
Output
Power-on
over valley
Power-on
at rising edge
Power-on
over tooth
Power-on
at falling edge
AGC Calibration
Running Mode
AGC Calibration
Running Mode
AGC Calibration
Running Mode
AGC Calibration
Running Mode
Package Position
1
3
4
2
1
2
4
3
Start Mode
Hysteresis
Overcome
Start Mode
Hysteresis
Overcome
Start Mode
Hysteresis
Overcome
Start Mode
Hysteresis
Overcome
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