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Allegro MicroSystems - Dynamic Self-Calibrating Peak-Detecting Differential Hall Effect Gear Tooth Sensor

Numéro de référence ATS616LSG
Description Dynamic Self-Calibrating Peak-Detecting Differential Hall Effect Gear Tooth Sensor
Fabricant Allegro MicroSystems 
Logo Allegro MicroSystems 





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ATS616LSG fiche technique
ATS616LSG
www.datasheet4u.com
Dynamic Self-Calibrating Peak-Detecting Differential
Hall Effect Gear Tooth Sensor
Package SG, 4-pin SIP
1234
1. VCC
2. VOUT
3. Test Pin (Tie to GND)
4. GND
The ATS616 gear-tooth sensor is a peak-detecting device that uses automatic gain
control and an integrated capacitor to provide extremely accurate gear edge detec-
tion down to low operating speeds. Each sensor module consists of a high-tem-
perature plastic shell that holds together a samarium-cobalt magnet, a pole piece,
and a differential open-collector Hall IC 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 gear-sensing technology used for this sensor module is Hall-effect based. The
sensor incorporates a dual-element Hall IC that switches in response to differential
magnetic signals created by ferrous targets. The sophisticated processing circuitry
contains an A-to-D converter that self-calibrates (normalizes) the internal gain
of the device to minimize the effect of air-gap variations. The patented peak-
detecting filter circuit eliminates magnet and system offsets and has the ability to
discriminate relatively fast changes such as those caused by tilt, gear wobble, and
eccentricities. This easy-to-integrate solution provides first-tooth detection and
stable operation to extremely low rpm. The ATS616 can be used as a replacement
for the ATS612LSB, eliminating the external peak-holding capacitor needed by
the ATS612LSB.
The ATS616 is ideal for use in systems that gather speed, position, and timing
information using gear-tooth-based configurations. This device is particularly
suited to those applications that require extremely accurate duty cycle control or
accurate edge-detection, such as automotive camshaft sensing.
TheATS616 is provided in a 4-pin SIP that is Pb (lead) free, with a 100% matte
tin plated leadframe.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VCC ..................................... 26.5 V*
Reverse-Supply Voltage, VRCC ........................ –18 V
Output Off Voltage, VOUTOFF ............................ 24 V
Continuous Output Current, IOUT ...................25 mA
Reverse-Output Current, IROUT.......................50 mA
Operating Temperature
Ambient, TA, Range L................ –40ºC to 150ºC
Maximum Junction, TJ(max)........................165ºC
Storage Temperature, TS .................. –65ºC to 170ºC
*See Power Derating section.
Features and Benefits
• Self-calibrating for tight timing accuracy
• First-tooth detection
• Immunity to air gap variation and system offsets
• Eliminates effects of signature tooth offsets
• Integrated capacitor provides analog peak and valley information
• Extremely low timing-accuracy drift with temperature changes
• Large air gap capability
• Small, integrated package
• Optimized magnetic circuit
• Undervoltage lockout (UVLO)
• Wide operating voltage range
Use the following complete part numbers when ordering:
Part Number
Package
Packing*
ATS616LSGTN-T
4-pin plastic SIP
13-in. reel, 800 pieces/reel
*Contact Allegro for additional packaging and handling options.
ATS616LSG-DS, Rev. 1
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com

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