ATS627LSGTN-T Allegro Microsystems Inc, ATS627LSGTN-T Datasheet

True Zero-Speed, Low Jitter, Hi-Accuracy Position Sensor

ATS627LSGTN-T

Manufacturer Part Number
ATS627LSGTN-T
Description
True Zero-Speed, Low Jitter, Hi-Accuracy Position Sensor
Manufacturer
Allegro Microsystems Inc
Series
-r
Type
Special Purposer
Datasheet

Specifications of ATS627LSGTN-T

Featured Product
ATS627 Position Sensor IC
Sensing Range
3mT ~ 120mT
Voltage - Supply
4 V ~ 24 V
Current - Supply
12mA
Current - Output (max)
25mA
Output Type
Digital, Open Collector
Features
Gear Tooth Type
Operating Temperature
-40°C ~ 150°C
Package / Case
4-SIP
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Features and Benefits
• Highly accurate in presence of:
• Highly repeatable output edges (low jitter)
• True zero-speed operation
• Undervoltage lockout
• Air gap independent switchpoints
• Defined power-on state
• High operating temperature
• Single-chip sensing IC for high reliability
• Enhanced quality through Scan Path and IDDQ
• Enhanced EMC performance
Package: 4-pin SIP (suffix SG)
ATS627LSG-DS, Rev. 1
▫ Anomalous target geometry (tooth-tooth variation)
▫ Signature teeth or valleys
▫ Target runout
measurement
VCC
Hall
Amp
Not to scale
Adjust
Offset
True Zero Speed, Low Jitter, High Accuracy
Regulators
Regulator
Analog
Digital
Functional Block Diagram
Filter
Digital Controller
Synchronous
AGC
Description
The ATS627 is a true zero-speed gear tooth sensor IC consisting
of an optimized Hall IC and rare earth pellet configuration in
a single overmolded package. The integrated circuit provides
a manufacturer-friendly solution for digital gear tooth sensing
applications. This small package can be easily assembled and
used in conjunction with gears of various shapes and sizes.
The dual-element Hall IC 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.
High-resolution peak detecting DACs are used to set the
adaptive switching thresholds of the device. Bounded tracking
and switchpoint hysteresis reduce the negative effects of any
anomalies in the magnetic signal associated with the targets
used in many automotive applications. This sensor IC system
is optimized for engine crank applications that utilize targets
that possess signature regions.
This device is available in a lead (Pb) free 4-pin SIP package
(SG) with a 100% matte tin plated leadframe.
PDAC
NDAC
Reference
Generator
Lockout
and
Position Sensor IC
+
ATS627LSG
Test Signals
Current
Multiplexed
Limit
GND
VOUT
TEST

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ATS627LSGTN-T Summary of contents

Page 1

Features and Benefits • Highly accurate in presence of: ▫ Anomalous target geometry (tooth-tooth variation) ▫ Signature teeth or valleys ▫ Target runout • Highly repeatable output edges (low jitter) • True zero-speed operation • Undervoltage lockout • Air gap ...

Page 2

... ATS627LSG Selection Guide Part Number ATS627LSGTN-T 800 pieces per 13-in. reel ® *Contact Allegro for additional packing options Absolute Maximum Ratings Characteristic Supply Voltage Output Off Voltage Reverse Supply Voltage Reverse Output Voltage Output Current Operating Ambient Temperature Maximum Junction Temperature ...

Page 3

ATS627LSG OPERATING CHARACTERISTICS Reference Target 60+2; unless otherwise specified Characteristics Electrical Characteristics Supply Voltage 2 Undervoltage Lockout Reverse Supply Current 3 Supply Zener Clamp Voltage Supply Current Test Pin Zener Clamp Voltage 4 Power-On Characteristics Power-On State Output Stage Characteristics ...

Page 4

ATS627LSG OPERATING CHARACTERISTICS Reference Target 60+2; unless otherwise specified Characteristics Performance Characteristics (continued) Relative Timing Accuracy, Sequential Mechanical Falling Edges Relative Timing Accuracy, Signature ERR Mechanical Rising Edge Relative Timing Accuracy, Signature ERR Mechanical Falling Edge Relative Repeatability, Sequential Rising ...

Page 5

ATS627LSG Figure 1. Definition of Output Delay Time, t Target V = the processed analog signal of the sinusoidal magnetic input (per channel) PROC T = period between successive sensed target mechanical edges of the same TARGET Figure 2. Definition ...

Page 6

ATS627LSG Supply Current (On) versus Supply Voltage Supply Voltage, V Supply Current (Off) versus Supply Voltage Supply Voltage, ...

Page 7

ATS627LSG 360° Repeatability versus Air Gap Sequential Region, 3 Rising Edges at Each T 0.30 0.25 0.20 0.15 0.10 Specification Limit 0. 0.5 1.0 1.5 2.0 Air Gap, AG (mm) True Zero Speed, Low Jitter, High Accuracy Output ...

Page 8

ATS627LSG Signature Feature, Rising Edge 1.5 1.0 0.5 0 -0.5 -1.0 -1.5 0 500 1000 1500 Operational Speed, S Sequential Features, Rising Edge 1.5 1.0 0.5 0 -0.5 -1.0 -1.5 0 500 1000 1500 Operational Speed, S True Zero Speed, ...

Page 9

ATS627LSG Signature Feature, Rising Edge 1.5 1.0 0.5 0 -0.5 -1.0 -1.5 0 500 1000 1500 Operational Speed, S Sequential Features, Rising Edge 1.5 1.0 0.5 0 -0.5 -1.0 -1.5 0 500 1000 1500 Operational Speed, S True Zero Speed, ...

Page 10

ATS627LSG Signature Feature, Rising Edge 1.5 1.0 0.5 0 -0.5 -1.0 -1.5 0 0.5 1.0 1.5 Air Gap, AG (rpm) Sequential Features, Rising Edge 1.5 1.0 0.5 0 -0.5 -1.0 -1.5 0 0.5 1.0 1.5 Air Gap, AG (rpm) True ...

Page 11

ATS627LSG Signature Feature, Rising Edge 1.5 1.0 0.5 0 -0.5 -1.0 -1.5 -50 - Ambient Temperature, T Sequential Features, Rising Edge 1.5 1.0 0.5 0 -0.5 -1.0 -1.5 -50 - Ambient Temperature, ...

Page 12

ATS627LSG Signature Feature, Rising Edge 1.5 1.0 0.5 0 -0.5 -1.0 -1.5 -50 - Ambient Temperature, T Sequential Features, Rising Edge 1.5 1.0 0.5 0 -0.5 -1.0 -1.5 -50 - Ambient Temperature, ...

Page 13

ATS627LSG Signature Feature, Rising Edge 1.5 1.0 0.5 0 -0.5 -1.0 -1.5 0 500 1000 1500 Operational Speed, S Sequential Features, Rising Edge 1.5 1.0 0.5 0 -0.5 -1.0 -1.5 0 500 1000 1500 Operational Speed, S True Zero Speed, ...

Page 14

ATS627LSG may require derating at maximum conditions, see Power Derating section Thermal Characteristics Characteristic Package Thermal Resistance *Additional thermal information available on the Allegro website 1900 1800 1700 1600 1500 1400 1300 1200 1100 1000 900 800 700 600 500 ...

Page 15

ATS627LSG Reference Target 60+2 Characteristics Symbol Outside Diameter D Outside diameter of target o Breadth of tooth, with respect to Face Width F branded face Length of tooth, with respect to Angular Tooth Thickness t branded face; measured at D ...

Page 16

ATS627LSG Sensing Technology The ATS627 contains a single-chip differential Hall-effect sensor IC, a samarium cobalt pellet, and a flat ferrous pole piece (con- centrator). As shown in figure 5, the Hall IC supports two Hall elements, which sense the magnetic ...

Page 17

ATS627LSG Undervoltage Lockout When the supply voltage falls below the undervoltage lockout voltage the device enters Reset, where the output CC(UV) state returns to the Power-On State (POS) until sufficient V is supplied. This lockout feature prevents false ...

Page 18

ATS627LSG PDAC Tracking Figure 8. Operation of Bounded Update method (for illustrative purposes only, values may not be to scale) • Two DACs track the V peaks. • The DACs track the V and Np values are used to establish ...

Page 19

ATS627LSG Power Derating The device must be operated below the maximum junction tem- perature of the device, T (max). Under certain combinations of J peak conditions, reliable operation may require derating supplied power or improving the heat dissipation properties of ...

Page 20

ATS627LSG Typical Application 0.1 μF (Recommended) Figure 9. Basic typical application circuit True Zero Speed, Low Jitter, High Accuracy 1 VCC BYPASS ATS627 3 TEST VOUT GND 4 Position Sensor Output 2 ...

Page 21

ATS627LSG 1.10 F 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 True Zero Speed, Low Jitter, High Accuracy Package SG, 4-Pin SIP 5.50±0.05 1. Branded E2 Face A 4 0.71±0.05 0.60±0.10 0.40±0.10 1.0 REF ...

Page 22

ATS627LSG Revision History Revision Rev. 1 Copyright ©2011, Allegro MicroSystems, Inc. Allegro MicroSystems, Inc. reserves the right to make, from time to time, such de par tures from the detail spec tions as may be required to ...

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