ATS627LSG Datasheet, PDF (1/22 Pages) Allegro MicroSystems – True Zero Speed, Low Jitter, High Accuracy Position Sensor IC

ATS627LSG
True Zero Speed, Low Jitter, High Accuracy
Position Sensor IC
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 independent switchpoints
• Defined power-on state
• High operating temperature
• Single-chip sensing IC for high reliability
• Enhanced quality through Scan Path and IDDQ
measurement
• Enhanced EMC performance
Package: 4-pin SIP (suffix SG)
Not to scale
Description
TheATS627 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.
Functional Block Diagram
VCC
Hall
Amp
Analog
Regulators
Digital
Regulator
Offset
Adjust
Filter
AGC
Synchronous
Digital Controller
PDAC
NDAC
Reference
Generator
and
Lockout
Multiplexed
Test Signals
TEST
VOUT
+
–
Current
Limit
GND
ATS627LSG-DS