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ATS643LSH-I2 Datasheet

  • ATS643LSH-I2

  • Self-Calibrating, Zero-Speed Differential Gear Tooth Sensor ...

  • 498.86KB

  • 16页

  • ALLEGRO   ALLEGRO

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ATS643LSH
Self-Calibrating, Zero-Speed Differential
Gear Tooth Sensor with Continuous Update
The ATS643 is an optimized combination of integrated circuit and magnet that
provides a manufacturer-friendly solution for true zero-speed digital gear-tooth
sensing in two-wire applications. The device consists of a single-shot molded
plastic package that includes a samarium cobalt magnet, a pole piece, and a
Hall-effect IC that has been optimized to the magnetic circuit and the automotive
environment. This small package can be easily assembled and used in conjunction
with a wide variety of gear shapes and sizes.
The integrated circuit incorporates a dual element Hall-effect sensor with signal
processing circuitry that switches in response to differential magnetic signals
created by rotating ferrous targets. The device contains a sophisticated compen-
sating circuit to eliminate magnet and system offsets immediately at power-on.
Digital tracking of the analog signal is used to achieve true zero-speed operation,
while also setting the device switchpoints. The resulting switchpoints are air gap
independent, greatly improving output and duty cycle accuracy. The device also
uses a continuous update algorithm to fine-tune the switchpoints while in running
mode, maintaining the device specifications even through large changes in air gap
or temperature.
The regulated current output is configured for two-wire operation, offering inher-
ent diagnostic information. This device is ideal for obtaining speed and duty cycle
information in gear-tooth based applications such as transmission speed sensing.
Package SH, 4-pin SIP
12
34
1. VCC
2. No connection (float or tie to VCC)
3. Test pin (float or tie to GND)
4. GND
Features and Benefits
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V
CC
..................See Power Derating
Reverse-Supply Voltage, V
RCC
........................
鈥?8 V
Operating Temperature
Ambient, T
A
................................
鈥?0潞C to 150潞C
Maximum Junction, T
J(max)
........................165潞C
Storage Temperature, T
S
..................
鈥?5潞C to 170潞C
鈥?Fully-optimized differential digital gear
tooth sensor
鈥?Single chip-IC for high reliability
鈥?Internal current regulator for 2-wire
operation
鈥?Small mechanical size (8 mm diameter
x 5.5 mm depth)
鈥?Switchpoints air gap independent
鈥?Digital output representing gear profile
鈥?Precise duty cycle accuracy through-
out temperature range
鈥?Large operating air gaps
鈥?<2 ms power-on time
鈥?AGC and reference adjust circuit
鈥?True zero-speed operation
鈥?Undervoltage lockout
鈥?Wide operating voltage range
鈥?Defined power-on state
Use the following complete part numbers when ordering:
Part Number
ATS643LSH-I1
ATS643LSH-I2
Package
4-pin plastic SIP
4-pin plastic SIP
I
CC
Typical
6.0 Low to 14.0 High mA
7.0 Low to 14.0 High mA
ATS643-DS, Rev. 1
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com

ATS643LSH-I2 产品属性

  • 800

  • 传感器，转换器

  • 磁性 - 霍尔效应，数字式开关，线性，罗盘 (IC)

  • -

  • 65% 跳闸，35% 释放

  • 专用型

  • 4 V ~ 24 V

  • 8.4mA

  • -

  • 数字，开路集电极

  • 轮齿类型

  • -40°C ~ 150°C

  • 4-SIP

  • 4-SIP

  • 散装

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