ATS616LSG Allegro MicroSystems, ATS616LSG Datasheet

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ATS616LSG

Manufacturer Part Number
ATS616LSG
Description
Dynamic Self-Calibrating Peak-Detecting Differential Hall Effect Gear Tooth Sensor
Manufacturer
Allegro MicroSystems
Datasheet

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Part Number:
ATS616LSGTN-T
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Allegro
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ATS616LSGTN-T
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ATS616LSG-DS, Rev. 1
Supply Voltage, V
Reverse-Supply Voltage, V
Output Off Voltage, V
Continuous Output Current, I
Reverse-Output Current, I
Operating Temperature
Storage Temperature, T
*See Power Derating section.
Ambient, T
Maximum Junction, T
AB SO LUTE MAX I MUM RAT INGS
1. VCC
2. VOUT
3. Test Pin (Tie to GND)
4. GND
Package SG, 4-pin SIP
A
, Range L................ –40ºC to 150ºC
CC
1
..................................... 26.5 V*
OUTOFF
2 3
S
.................. –65ºC to 170ºC
4
J(max)
ROUT
RCC
OUT
............................ 24 V
........................ –18 V
.......................50 mA
........................165ºC
Dynamic Self-Calibrating Peak-Detecting Differential
...................25 mA
ATS616LSG
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.
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:
*Contact Allegro for additional packaging and handling options.
ATS616LSGTN-T
Part Number
Hall Effect Gear Tooth Sensor
4-pin plastic SIP
Package
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
13-in. reel, 800 pieces/reel
Packing*

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ATS616LSG Summary of contents

Page 1

... J(max) Storage Temperature, T .................. –65ºC to 170ºC S *See Power Derating section. ATS616LSG-DS, Rev. 1 ATS616LSG Hall Effect Gear Tooth Sensor 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- ...

Page 2

... Dynamic Self-Calibrating Peak-Detecting Differential Hall Effect Gear Tooth Sensor www.datasheet4u.com VCC Voltage Regulator Hall Amp Hall Amp ATS616LSG-DS, Rev. 1 ATS616LSG Functional Block Diagram UVLO Tooth and Valley Comparator Gain Track and Hold Reference Generator Track and Hold GND (Recommended) Power-On Logic ...

Page 3

... Maximum voltage must be adjusted for power dissipation and junction temperature; see Power Derating section the probe capacitance of the oscilloscope used to make the measurement (millitesla), exactly. 5 Non-uniform magnetic profiles may require additional edges before calibration is complete. ATS616LSG-DS, Rev. 1 ATS616LSG Symbol Test Condition V Operating, T < 165° ...

Page 4

... Valley width, t > • Valley depth, h > • Tooth thickness, F ≥ • Target material must be low carbon steel ATS616LSG-DS, Rev. 1 ATS616LSG Reference Target (Gear) Information Test Conditions Typ. Outside diameter of target 120 Breadth of tooth, with respect 6 ...

Page 5

... T (°C) A Output Voltage (On) versus Ambient Temperature 350 300 250 200 150 100 50 0 – 100 T (°C) A Continued on the next page. ATS616LSG-DS, Rev. 1 ATS616LSG Characteristic Data (° – 150 ...

Page 6

... Dynamic Self-Calibrating Peak-Detecting Differential Hall Effect Gear Tooth Sensor www.datasheet4u.com Relative Timing Accuracy versus Air Gap Sequential Tooth Falling Edge 1000 rpm 1.5 1.0 0.5 0.0 -0.5 -1.0 -1.5 0 0.5 1.0 1.5 AG (mm) Relative Timing Accuracy versus Air Gap Signature Tooth Falling Edge 1000 rpm 1.5 1.0 0.5 0.0 -0.5 -1.0 -1.5 0 0.5 1.0 1.5 AG (mm) ATS616LSG-DS, Rev. 1 ATS616LSG Characteristic Data 1.5 1.0 T (°C) A 0.5 – -0.5 125 150 -1.0 -1.5 2.0 2.5 3.0 1.5 1.0 T (°C) A 0.5 – ...

Page 7

... T (°C) A Relative Timing Accuracy versus Ambient Temperature Sequential Tooth Rising Edge 0.5 mm 1.5 1.0 0.5 0.0 -0.5 -1.0 -1.5 – 100 T (°C) A ATS616LSG-DS, Rev. 1 ATS616LSG Characteristic Data (continued) Relative Timing Accuracy versus Ambient Temperature 1.5 1.0 rpm 0.5 10 100 0.0 500 1000 -0.5 1500 2000 -1.0 -1.5 150 200 –50 Relative Timing Accuracy versus Ambient Temperature 1 ...

Page 8

... Dynamic Self-Calibrating Peak-Detecting Differential Hall Effect Gear Tooth Sensor THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information Characteristic www.datasheet4u.com Package Thermal Resistance *Additional information is available on the Allegro Web site. ATS616LSG-DS, Rev. 1 ATS616LSG Symbol Test Conditions* Single-sided PCB with copper limited to solder pads R Two-sided PCB with copper limited to solder pads and 3.57 in. θ ...

Page 9

... Hall Effect Device North Pole (Pin n >1 Side) Figure 2. Relative motion of the target is detected by the dual Hall ele- ments mounted on the Hall IC. ATS616LSG-DS, Rev. 1 ATS616LSG Functional Description rejection circuitry. The Hall transducers and signal processing electronics are integrated on the same silicon substrate, using a proprietary BiCMOS process ...

Page 10

... Immunity to gear run out. The differential sensor configura- tion eliminates the baseline variations caused by gear run out. Differential vs. Single-Element Sensing. Hall-effect configuration is superior in most applications to the ATS616LSG-DS, Rev. 1 ATS616LSG classical single-element gear-tooth sensor. The single-element configuration commonly used (Hall-effect sensor mounted on the face of a simple permanent magnet) requires the detection of a small signal (often < ...

Page 11

... OUT Target Motion from Pin 4 to Pin 1 Figure 7. The magnetic profile reflects the geometry of the target, allowing the device to present an accurate digital output response. ATS616LSG-DS, Rev. 1 ATS616LSG High-pass filtering is below the minimum operating voltage, V off and stays off, irrespective of the state of the magnetic field. ...

Page 12

... 140°C/W = 7°C θ ΔT = 25°C + 7°C = 32° ATS616LSG-DS, Rev. 1 ATS616LSG Power Derating A worst-case estimate, P able power level ( selected R Example: Reliability for V minimum-K PCB figure of merit sum- Observe the worst-case ratings for the device, specifically: θJA R θ ...

Page 13

... Temperature excursions 225°C for 2 minutes or less are permitted. b Industry accepted soldering techniques are acceptable for this package as long as the indicated maximum temperature is not exceeded. Additional soldering information is available on the Allegro Web site. ATS616LSG-DS, Rev. 1 ATS616LSG Characterization Only Test Name* ...

Page 14

... The in for ma tion in clud ed herein is believed rate and reliable. How ev er, Allegro MicroSystems, Inc. assumes no re spon si bil i ty for its use; nor for any in fringe ment of patents or other rights of third parties which may result from its use. Copyright © 2005 Allegro MicroSystems, Inc. ATS616LSG-DS, Rev. 1 ATS616LSG Package SG Module ...

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