ATS625LSG
True Zero-Speed Low-Jitter
High Accuracy Gear Tooth Sensor
The ATS625 true zero-speed gear tooth sensor is an optimized Hall IC and magnet
configuration packaged in a molded module that provides a manufacturer-friendly
solution for digital gear tooth sensing applications. The sensor assembly consists
of an over-molded package that holds together a samarium cobalt magnet, a
pole piece concentrator, and a true zero-speed Hall IC that has been optimized
to the magnetic circuit. This small package can be easily assembled and used in
conjunction with gears of various shapes and sizes.
Package SG, 4-pin Through Hole
The sensor incorporates a dual-element Hall IC that switches in response to
differential magnetic signals created by a ferrous target. Digital processing of the
analog signal provides zero-speed performance independent of air gap as well
as dynamic adaptation of device performance to the typical operating conditions
found in automotive applications (reduced vibration sensitivity). High-resolution
peak detecting DACs are used to set the adaptive switching thresholds of the
device. Switchpoint hysteresis reduces the negative effects of any anomalies in the
magnetic signal associated with the targets used in many automotive applications.
This sensor system is optimized for crank applications that utilize targets that
possess signature regions.
TheATS625 is provided in a 4-pin SIP. The Pb (lead) free option, available by
special request, has a 100% matte tin plated leadframe.
Features and Benefits
1
2
3
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ꢀHighly repeatable over operating temperature range
ꢀTight timing accuracy over operating temperature range
ꢀTrue zero-speed operation
1. VCC
ꢀAir-gap–independent switchpoints
ꢀVibration immunity
ꢀLarge operating air gaps
2. VOUT
3. AUX
4. GND
ꢀDefined power-on state
ꢀWide operating voltage range
ꢀDigital output representing target profile
ꢀSingle-chip sensing IC for high reliability
ꢀSmall mechanical size
ABSOLUTE MAXIMUM RATINGS
Supply Voltage*, V CC .......................................26.5 V
Reverse-Supply Voltage, VRCC ........................–18 V
Reverse-Supply Current, IRCC ........................50 mA
Reverse-Output Voltage, VROUT .....................–0.5 V
Continuous Output Current, IOUT ...................25 mA
Output Sink Current, IOUT ............................. 10 mA
Operating Temperature
Ambient, TA, Range L................–40ºC to 150ºC
Maximum Junction, TJ(max)........................165ºC
Maximum Junction ≤100 hr, TJ(max100)......180ºC
Storage Temperature, TS ..................–65ºC to 170ºC
*See the Power Derating section.
ꢀOptimized Hall IC magnetic system
ꢀFast start-up
ꢀAGC and reference adjust circuit
ꢀUndervoltage lockout
Use the following complete part numbers when ordering:
Part Number
Pb-free
–
Packing1
ATS625LSGTN
Tape and Reel 13-in. 800 pcs./reel
ATS625LSGTN-T
Yes2
1Contact Allegro for additional packing options.
2Available by special request only.
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
ATS625LSG-DS, Rev. 1