ATS601 Datasheet, PDF (1/14 Pages) Allegro MicroSystems – Single Element, Tooth Detecting Speed Sensor IC

ATS601LSG
Single Element, Tooth Detecting
Speed Sensor IC
Features and Benefits
• Digital output representing target profile
• Single Hall element for twist–insensitive mounting and
direction insensitive polarity
• True zero–speed operation
• Defined power-on state
• Air gap independent switchpoints
• Chopper stabilized
• Operation down to 3.3 V
• Factory programmable options:
▫ Output polarity: low or high opposite tooth
▫ Startup hysteresis: 40 G or 80 G
▫ Threshold location: 30% or 50% from signal peak
▫ Threshold update: single tooth (continuous) or four–
tooth memory
• Fully synchronous digital logic with Scan Path and IDDQ
testing
Package: 4–pin SIP (suffix SG)
Not to scale
Description
TheATS601LSG is a unique addition to theAllegro™ camshaft
sensor IC family of products. As a single element, defined
power–on state, sensor IC, it provides first falling edge detection,
high running mode edge accuracy, and direction/orientation
insensitivity over the full operating range of air gap, speed,
and temperature. The ATS601LSG consists of an optimized
Hall IC and a simple magnetic pellet configuration.
The single element Hall IC and magnetic pellet configuration
switches in response to magnetic signals created by a
ferromagnetic target. The IC contains a low bandwidth filter
that increases the noise immunity and the signal–to–noise ratio
of the sensor IC. Sophisticated digital circuit design eliminates
the detrimental effects of target geometry discontinuity, magnet
and system offsets, and thermal gradients. Signal processing
is used to provide zero speed performance independent of air
gap and also to dynamically adapt device performance to the
typical operating conditions found in automotive applications,
particularly camshaft sensing. The resulting output of the device
is a digital representation of the ferromagnetic target profile.
A number of factory programmable options allow for
performance optimization to meet specific application
requirements.
The ATS601 is provided in a 4–pin SIP package (suffix SG)
that is lead (Pb) free, with 100% matte tin leadframe plating.
VCC
ATS601LSG–DS
Functional Block Diagram
Internal Regulator
(Analog)
Internal Regulator
(Digital)
Chopper
Stabilization
Hall
Amplifier
Offset
Adjust
ADC
Temperature
Compensation
Multiplexed Test
Signals
TEST
Low Pass
Filters
Synchronous
Digital Controller
Tooth Detection
Offset Control
Application Trim
Stop Mode Timer
Current
Limit
OUT
GND