ATS617LSGTN-T Allegro Microsystems Inc, ATS617LSGTN-T Datasheet

IC HALL EFFECT GEAR SENSOR 4SIP

ATS617LSGTN-T

Manufacturer Part Number
ATS617LSGTN-T
Description
IC HALL EFFECT GEAR SENSOR 4SIP
Manufacturer
Allegro Microsystems Inc
Type
Special Purposer
Datasheet

Specifications of ATS617LSGTN-T

Package / Case
4-SIP
Sensing Range
60G
Voltage - Supply
4.5 V ~ 24 V
Current - Supply
12mA
Current - Output (max)
55mA
Output Type
Digital, Open Collector
Features
Gear Tooth Type
Operating Temperature
-40°C ~ 150°C
Output Current
45mA
Bandwidth
15kHz
Supply Voltage Max
24V
Hall Effect Type
Gear Tooth
Operating Temperature Range
-40°C To +150°C
Supply Voltage Min
4.5V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
620-1326-2

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ATS617LSGTN-T
Manufacturer:
ALLEGRO
Quantity:
8 000
Features and Benefits
▪ Self-calibrating for tight timing accuracy
▪ First-tooth detection
▪ Immunity to air gap variation and system offsets
▪ Immunity to signature tooth offsets
▪ Integrated capacitor provides analog peak and
▪ Low timing-accuracy drift with temperature changes
▪ Low radiated emissions
▪ Integrated, series resistor on VCC pin for improved
▪ Large air gap capability
▪ Small, integrated package
▪ Optimized magnetic circuit
▪ Undervoltage lockout (UVLO)
▪ Wide operating voltage range
Package: 4-pin SIP (suffix SG)
Not to scale
ATS617LSG-DS, Rev. 1
valley information
transient immunity
VC
C
Amp
Amp
Hall
Hall
Dynamic, Self-Calibrating, Peak-Detecting, Differential
R
S
Regulator
Voltage
Functional Block Diagram
Gain
Reference
GND
Generator
UVLO
(Recommended)
Description
The ATS617 gear-tooth sensor IC is a peak-detecting device
that uses automatic gain control and an integrated capacitor
to provide extremely accurate gear edge detection down to
low operating speeds. Each device consists of a high-tem-
perature plastic shell that holds together a samarium-cobalt
pellet, 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 technology used for this device is Hall-effect based. The
device incorporates a dual-element Hall IC that switches in
response to differential magnetic signals created by fer-
romagnetic targets. The sophisticated processing circuitry
contains an A-to-D converter that self-calibrates (normal-
izes) the internal gain of the device to minimize the effect of
air gap variations. The patented peak-detecting filter circuit
provides immunity to 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 falling edge detection and
stable operation to extremely low rpm. The ATS617 can be
used as a replacement for the ATS616.
The ATS617 is ideal for use in systems that gather speed,
position, and timing information using gear-tooth-based
Continued on the next page…
Hall Effect Gear Tooth Sensor IC
Track and
Track and
Hold
Hold
Tooth and Valley
Comparator
TEST
Power-On
Logic
Current
Limit
ATS617LSG
VOUT

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ATS617LSGTN-T Summary of contents

Page 1

Dynamic, Self-Calibrating, Peak-Detecting, Differential Features and Benefits ▪ Self-calibrating for tight timing accuracy ▪ First-tooth detection ▪ Immunity to air gap variation and system offsets ▪ Immunity to signature tooth offsets ▪ Integrated capacitor provides analog peak and valley information ...

Page 2

... The ATS617 is provided in a 4-pin SIP that is Pb (lead) free, with a 100% matte tin plated leadframe. Selection Guide Part Number ATS617LSGTN-T 13-in. reel, 800 pieces/reel ® *Contact Allegro for additional packing options Absolute Maximum Ratings ...

Page 3

Dynamic, Self-Calibrating, Peak-Detecting, Differential ATS617LSG OPERATING CHARACTERISTICS over operating voltage and temperature range, unless otherwise noted Characteristic Electrical Characteristics 2 Supply Voltage Supply Protection Resistor Undervoltage Lockout Threshold Output On Voltage Supply Zener Clamp Voltage Output Zener Clamp Voltage Supply ...

Page 4

Dynamic, Self-Calibrating, Peak-Detecting, Differential ATS617LSG OPERATING CHARACTERISTICS (continued) over operating voltage and temperature range, unless otherwise noted Characteristic Performance Characteristics (continued) Initial Calibration Cycle 5 Calibration Mode Disable 6,7 Relative Timing Accuracy, Sequential 4 Allowable User Induced Differential Offset Switching ...

Page 5

Dynamic, Self-Calibrating, Peak-Detecting, Differential ATS617LSG REFERENCE TARGET 60+2 Sym- Characteristics bol Outside Diameter D Outside diameter of target o Breadth of tooth, with respect Face Width F to branded face Length of tooth, with respect to Angular Tooth t Thickness ...

Page 6

Dynamic, Self-Calibrating, Peak-Detecting, Differential ATS617LSG Supply Current (On) versus Supply Voltage (V) CC Supply Current (Off) versus Supply Voltage ...

Page 7

Dynamic, Self-Calibrating, Peak-Detecting, Differential ATS617LSG Output Voltage (On) versus Ambient Temperature 400 300 200 100 0 – 100 T (°C) A Output Leakage Current (Off) versus Ambient Temperature – 100 T (°C) ...

Page 8

Dynamic, Self-Calibrating, Peak-Detecting, Differential ATS617LSG Edge Position versus Target Speed through Ambient Temperature Range T = –40°C A Rising Edge 1.5 1.0 0.5 0 -0.5 -1.0 -1.5 0 0.5 1.0 1.5 Speed (krpm) Falling Edge 1.5 1.0 0.5 0 -0.5 ...

Page 9

Dynamic, Self-Calibrating, Peak-Detecting, Differential ATS617LSG Edge Position versus Air Gap through Target Speed Range Speed = 10 rpm Rising Edge 1.5 1.0 0.5 0 -0.5 -1.0 -1.5 0 1.0 2.0 Air Gap (mm) Falling Edge 1.5 1.0 0.5 0 -0.5 ...

Page 10

Dynamic, Self-Calibrating, Peak-Detecting, Differential ATS617LSG THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information Characteristic Package Thermal Resistance *Additional information is available on the Allegro website. Hall Effect Gear Tooth Sensor IC Symbol Test Conditions* Single-sided PCB with ...

Page 11

Dynamic, Self-Calibrating, Peak-Detecting, Differential ATS617LSG Assembly Description The ATS617 gear-tooth sensor Hall IC/rare-earth pellet configuration that is fully optimized to provide detection of gear tooth edges. This device is packaged in a molded miniature plastic body that ...

Page 12

Dynamic, Self-Calibrating, Peak-Detecting, Differential ATS617LSG Superior Performance The ATS617 peak-detecting differen- tial design has several advantages over conventional Hall-effect gear-tooth sensors. The signal-processing techniques used in the ATS617 solve the catastrophic issues that affect the functionality of conventional digital gear-tooth ...

Page 13

Dynamic, Self-Calibrating, Peak-Detecting, Differential ATS617LSG Peak Detecting vs. AC-Coupled Filters High-pass filter- ing (normal AC coupling commonly used technique for eliminating circuit offsets. However, AC coupling has errors at power-on because the filter circuit needs to hold the ...

Page 14

Dynamic, Self-Calibrating, Peak-Detecting, Differential ATS617LSG The device must be operated below the maximum junction temperature of the device Under certain combinations of J(max) peak conditions, reliable operation may require derating supplied power or improving the heat dissipation properties ...

Page 15

ATS617LSG 2.20 8.00±0.05 5.80±0.05 E1 1.70±0.10 4.70±0. 24.65±0.10 15.30±0.10 A 5.50±0.10 Dynamic, Self-Calibrating, Peak-Detecting, Differential Package SG 4-Pin SIP 5.50±0. Branded E2 Face A 4 0.71±0.05 0.60±0.10 0.40±0.10 1.0 REF 1.60±0.10 0.71±0.10 1.27±0.10 Hall Effect ...

Page 16

Dynamic, Self-Calibrating, Peak-Detecting, Differential ATS617LSG Copyright ©2009, Allegro MicroSystems, Inc. The products described herein are manufactured under one or more of the following U.S. patents: 5,264,783; 5,389,889; 5,442,283; 5,517,112; 5,581,179; 5,619,137; 5,621,319; 5,650,719; 5,686,894; 5,694,038; 5,729,130; 5,917,320; 6,091,239; 6,100,680; 6,232,768; ...

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