Tooth Sensor. ATS668LSM Datasheet

ATS668LSM Sensor. Datasheet pdf. Equivalent


Allegro ATS668LSM
ATS668LSM
True Zero-Speed High-Accuracy
Gear Tooth Sensor IC
FEATURES AND BENEFITS
• Three-wire back-biased speed sensor optimized for
transmission speed-sensing applications
• Integrated in-package EMC protection circuit allows
compliance to most Automotive EMC environments
without external circuitry
• Small-signal lockout for immunity to vibration
• Tight timing accuracy over full operating temperature
range
• True zero-speed operation
• Air gap independent switchpoints
• Large operating air gaps achieved through use of gain
and offset adjust circuitry
• Wide operating voltage range with undervoltage lockout
(UVLO)
• Digital output representing target profile
• Single-chip sensing IC for high reliability
• High-speed startup
PACKAGE: 3-pin SIP (suffix SM)
DESCRIPTION
TheATS668LSM is an optimized Hall-effect integrated circuit
(IC) and permanent magnet pellet combination with integrated
EMC protection components to provide a user-friendly solution
for true zero-speed digital gear tooth sensing.The small package
can be easily assembled and used in conjunction with a wide
variety of gear tooth sensing applications.
The device incorporates a dual element Hall IC that switches
in response to differential magnetic signals created by
a ferromagnetic target. The IC contains a sophisticated
compensating circuit designed to eliminate the detrimental
effects of magnet and system offsets. Digital processing of the
analog signal provides zero-speed performance independent of
air gap and also dynamic adaptation of device performance to the
typical operating conditions found in automotive applications
(i.e. vibration immunity and runout tolerance). High-resolution
peak detecting DACs are used to set the adaptive switching
thresholds of the device. Hysteresis in the thresholds reduces
the negative effects of any anomalies in the magnetic signal
associated with system or target anomalies typically seen in
many automotive applications.
This device is available in a lead (Pb) free 3-pin SIP package
(SM) with matte-tin leadframe plating.
Not to scale
Package
Die
VCC
RSUPPLY
Functional Block Diagram
Hall Amp
Offset
Adjust
AGC
PDAC
NDAC
Th reshold
Comparators
+
-
+
-
Output
Control
CSUPPLY
Control Logic and Threshold Generator
ATS668LSM-DS, Rev. 3
MCO-0000153
GND
ROUT
COUT
VOUT
July 2, 2019


ATS668LSM Datasheet
Recommendation ATS668LSM Datasheet
Part ATS668LSM
Description True Zero-Speed High-Accuracy Gear Tooth Sensor
Feature ATS668LSM; ATS668LSM True Zero-Speed High-Accuracy Gear Tooth Sensor IC FEATURES AND BENEFITS • Three-wire ba.
Manufacture Allegro
Datasheet
Download ATS668LSM Datasheet




Allegro ATS668LSM
ATS668LSM
True Zero-Speed High-Accuracy
Gear Tooth Sensor IC
SELECTION GUIDE
Part Number
Package
ATS668LSMTN-T
3-pin SIP with matte-tin leadframe plating
*Contact Allegromarketing or your local sales representative for additional options.
RoHS
COMPLIANT
ABSOLUTE MAXIMUM RATINGS
Characteristic
Symbol
Supply Voltage
Reverse Supply Voltage
Reverse Supply Current
Reverse Output Voltage
Output Sink Current
Operating Ambient Temperature
Maximum Junction Temperature
Storage Temperature
VCC
VRCC
IRCC
VROUT
IOUT
TA
TJ(max)
Tstg
Notes
Range L, refer to Power Derating Curve
INTERNAL PASSIVE COMPONENTS RATINGS
Symbol
Characteristic
Rating
CSUPPLY
COUT
RSUPPLY
ROUT
Rated Nominal Capacitance
Rated Nominal Capacitance
Rated Nominal Resistance
Rated Nominal Resistance
220
1.8
50
50
Unit
nF
nF
Ω
Ω
Rating
26.5
–18
50
-0.5
25
–40 to 150
165
–65 to 170
Units
V
V
mA
V
mA
°C
°C
°C
Pinout Diagram
1 23
Terminal List Table
Number
Name
1 VCC
2 GND
3 VOUT
Function
Supply voltage
Ground
Device output
VCC
ATS668SM
RSUPPLY
CSUPPLY
VCC
ROUT
COUT
RPU
VOUT
GND
Figure 1: Typical Application
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
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Allegro ATS668LSM
ATS668LSM
True Zero-Speed High-Accuracy
Gear Tooth Sensor IC
OPERATING CHARACTERISTICS: Valid throughout full operating and temperature ranges, using Reference Target 60-0, unless
otherwise noted.
Characteristics
Symbol
Test Conditions
Min. Typ. Max. Unit
ELECTRICAL CHARACTERISTICS
Supply Voltage
Undervoltage Lockout
Reverse Supply Current
Supply Current
Supply Zener Clamp Voltage
Supply Zener Current
Reverse Supply Zener Clamp Voltage
OUTPUT STAGE
VCC
VUVLO
IRCC
ICC
VZ
IZ
VRZ
Operating, TJ < TJ (max)
VCC = –18 V
ICC = ICC(MAX) + 3 mA
TJ < TJ (max), VCC = 27 V
ICC = –3 mA, TA = 25°C
4.6 – 24 V
4.1 4.55
V
– – –10 mA
– – 12 mA
28.0 – – V
– – 15 mA
– – –18 V
Low Output Voltage
Output Zener Clamp Voltage
Output Current Limit
Output Leakage Current
Output Rise Time
Output Fall Time
VSAT
VZOUT
ILIM
IOFF
tr
tf
ISINK = 10 mA, Output = ON
IOUT = 3 mA, TA = 25°C
VOUT = 12 V, TJ < TJ (max)
VOUT = 24 V, Output = off state (VOUT = High)
RPU = 1 kΩ, VPU = 5 V
28.0
25
750 1000 mV
––V
45 70 mA
– 10 µA
4 – μs
6 – μs
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
3





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