ATS665LSGTN-T Allegro Microsystems Inc, ATS665LSGTN-T Datasheet - Page 2

• Manufacturer Part Number: ATS665LSGTN-T
• Description: IC SENSOR HALL GEAR TOOTH 4-SIP
• Manufacturer: Allegro Microsystems Inc
• Type: Special Purposer

Specifications of ATS665LSGTN-T

• Sensing Range: 70% of Air Gap Trip, 30% of Air Gap Release
• Voltage - Supply: 3.3 V ~ 24 V
• Current - Supply: 14mA
• Current - Output (max): 20mA
• Output Type: Digital, Open Collector
• Features: Gear Tooth Type
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 4-SIP
• Operating Supply Voltage (min): 3.3V
• Operating Supply Voltage (typ): 5/9/12/15/18V
• Operating Supply Voltage (max): 24V
• Output Current: 20mA
• Package Type: SIP Module(SG)
• Pin Count: 4
• Mounting: Through Hole
• Operating Temp Range: -40C to 150C
• Operating Temperature Classification: Automotive
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 620-1161-2

Features and Benefits
▪ True zero-speed operation
▪ Switchpoints independent of air gap
▪ High vibration immunity
▪ Precise duty cycle signal over operating temperature range
▪ Large operating air gaps
▪ Defined power-on state
▪ Wide operating voltage range
▪ Digital output representing target profile
▪ Single-chip sensing IC for high reliability
▪ Small mechanical size
▪ Optimized Hall IC magnetic system
▪ 200 μs power-on time at gear speed < 100 rpm
▪ AGC and reference adjust circuit
▪ Undervoltage lockout
Package: 4-pin SIP (suffix SG)
Not to scale
ATS665-DS, Rev. 4
True Zero Speed, High Accuracy, Gear Tooth Sensor IC
HALL AMP
AUTOMATIC
CONTROL
GAIN
PDAC
NDAC
Functional Block Diagram
Vsig
PPEAK
NPEAK
REFERENCE
GENERATOR
Description
The ATS665 true zero-speed gear tooth sensor IC is an optimized
Hall IC/rare earth pellet configuration designed to provide a
user-friendly solution for digital gear tooth sensing applications.
The over-molded package, holds together a samarium cobalt
pellet, a pole piece and a true zero-speed Hall IC that has been
optimized to the magnetic circuit. This small package can be
easily assembled and used in conjunction with gears of various
shapes and sizes.
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 reduce 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
(reduced vibration sensitivity). 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 the
targets used in many automotive applications.
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THRESHN
THRESHP
THRESHOLD
COMPARATOR
REGULATOR
INTERNAL
THRESH
LOGIC
ATS665LSG
Output
Transisto
r
Current
OUTPUT
Limit
GND
Vcc