ATS601LSG
Single Element, Tooth Detecting
Speed Sensor IC
Description
Features and Benefits
TheATS601LSGisauniqueadditiontotheAllegro™camshaft
sensor IC family of products. As a single element, defined
power–onstate,sensorIC,itprovidesfirstfallingedgedetection,
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.
• 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
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
thatincreasesthenoiseimmunityandthesignal–to–noiseratio
ofthesensorIC. Sophisticateddigitalcircuitdesigneliminates
thedetrimentaleffectsoftargetgeometrydiscontinuity,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,
particularlycamshaftsensing.Theresultingoutputofthedevice
is a digital representation of the ferromagnetic target profile.
• 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)
A number of factory programmable options allow for
performance optimization to meet specific application
requirements.
Not to scale
The ATS601 is provided in a 4–pin SIP package (suffix SG)
that is lead (Pb) free, with 100% matte tin leadframe plating.
Functional Block Diagram
VCC
Internal Regulator
(Analog)
Multiplexed Test
TEST
Signals
Internal Regulator
(Digital)
Chopper
Stabilization
Synchronous
Digital Controller
OUT
Tooth Detection
Offset Control
Application Trim
Stop Mode Timer
Hall
Amplifier
Offset
Adjust
Low Pass
Filters
Current
Limit
ADC
Temperature
Compensation
GND
ATS601LSG–DS