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ATS645LSH-I1-T

Description
Magnetic Field Sensor, BICMOS, Plastic/epoxy, 4 Pin, Through Hole Mount, LEAD FREE, PLASTIC, SIP-4
CategoryThe sensor    Sensor/transducer   
File Size413KB,14 Pages
ManufacturerAllegro
Websitehttp://www.allegromicro.com/
Environmental Compliance  
Download Datasheet Parametric View All

ATS645LSH-I1-T Overview

Magnetic Field Sensor, BICMOS, Plastic/epoxy, 4 Pin, Through Hole Mount, LEAD FREE, PLASTIC, SIP-4

ATS645LSH-I1-T Parametric

Parameter NameAttribute value
Is it lead-free?Lead free
Is it Rohs certified?conform to
MakerAllegro
package instructionSIP4,.18,50
Reach Compliance Codecompliant
shellPLASTIC
JESD-609 codee3
Installation featuresTHROUGH HOLE MOUNT
Number of terminals4
Maximum working current16 mA
Maximum operating temperature150 °C
Minimum operating temperature-40 °C
Output interface type2-WIRE INTERFACE
Output typeDIGITAL CURRENT
Package body materialPLASTIC/EPOXY
Encapsulate equivalent codeSIP4,.18,50
power supply4/24 V
Maximum supply voltage24 V
Minimum supply voltage4 V
surface mountNO
technologyBICMOS
Terminal surfaceMatte Tin (Sn)
ATS645LSH
Two-Wire True Zero Speed Miniature Differential
Peak-Detecting Gear Tooth Sensor
The components in speed sensing applications continue to diminish in size to meet
spatial constraints and weight reduction requirements. As the geometries of gears
become smaller, this can compromise the capabilities of a gear speed sensor. The
ATS645 Hall-element-to-Hall-element spacing of only 1.5 mm makes this device
uniquely capable of accommodating very
ne-pitch gears. In addition, the ATS645
signal peak-detecting algorithm supports consistent switching at relatively large
air gaps, where the peak-to-peak amplitude is small. These features make the
ATS645 the ideal solution to detect the speed of
ne-pitch targets such as those
found in ABS (antilock braking) systems.
The ATS645 combines a Hall-effect sensing integrated circuit and magnet to
provide 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 integrated circuit that has been optimized to the magnetic circuit. 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 as well as
signal processing that switches the output state in response to changes in the
magnetic gradients created by ferrous gear teeth. The circuitry contains a sophis-
ticated digital circuit to eliminate magnet and system offsets and to achieve true
zero speed operation (U.S. Patent 5,917,320). A-D and D-A converters are used
to adjust the device gain at power-on and to allow switching independent of the
breadth of the air gap.
The regulated current output is configured for two wire applications, requiring one
less wire for operation than do switches with the more traditional open-collector
output.The package is available in a lead (Pb) free version, with 100% matte tin
leadframe plating.
Package SH, 4-pin SIP
12
34
1. VCC
2. No connection
3. Test pin (float or tie to GND)
4. GND
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V
CC
..........................................
28 V
Reverse-Supply Voltage, V
RCC
........................
–18 V
Operating Temperature
Ambient, T
A
,...............................
–40ºC to 150ºC
Maximum Junction, T
J(max)
........................165ºC
Storage Temperature, T
S
..................
–65ºC to 170ºC
Features and Benefits
• Fully optimized differential digital gear
tooth sensor
• Single chip IC for high reliability
• Internal current regulator for 2-wire
operation
• Small mechanical size (8 mm
diameter x 5.5 mm depth)
• Air gap independent switchpoints
• Digital output representing gear
profile
• Precise duty cycle signal over
operating temperature range
• Large operating air gaps
• Automatic Gain Control (AGC)
• Automatic Offset Adjustment (AOA)
• True zero-speed operation
• Undervoltage lockout
• Wide operating voltage range
• Defined power-on state
Use the following complete part numbers when ordering:
Part Number
ATS645LSH-I1
ATS645LSH-I1-T
ATS645LSH-I2
ATS645LSH-I2-T
Pb-free
Yes
Yes
I
CC
Typical
6.0 Low to 14.0 High mA
7.0 Low to 14.0 High mA
Package
4-pin plastic SIP
ATS645-DS
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
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