ATS665LSGTN-T Allegro Microsystems Inc, ATS665LSGTN-T Datasheet - Page 12

• 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

Automatic Gain Control (AGC)
The patented self-calibrating circuitry is unique. After each
power up, the device measures the peak-to-peak magnetic signal.
The gain of the IC is then adjusted which keeps the internal signal
amplitude constant over the air gap range of the device. This fea-
ture provides operational characteristics independent of air gap.
ATS665LSG
-1000
1000
-200
-400
-600
-800
800
600
400
200
0
Magnetic Signal with no Amplification
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
DIFFERENTIAL MAGNETIC SIGNAL
WITH INCREASING AIR GAP
TARGET POSITION [DEGREES]
True Zero Speed, High Accuracy, Gear Tooth Sensor IC
0.25 mm
0.50 mm
1.00 mm
1.50 mm
2.00 mm
Offset Adjust
In addition to normalizing performance over air gap, the gain
control circuitry also reduces the effect of chip, magnet, and
installation offsets. This is accomplished using two D/A convert-
ers that capture the peak and valley of the signal and use it as a
reference for the switching comparator. If induced offsets bias the
absolute signal up or down, AGC and the dynamic DAC behav-
ior work to normalize and reduce the impact of the offset on IC
performance.
-1000
1000
-200
-400
-600
-800
800
600
400
200
0
DIFFERENTIAL ELECTRICAL SIGNAL
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Electrical Signal after AGC
WITH INCREASING AIR GAP
TARGET POSITION [DEGREES]
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
0.25 mm
0.50 mm
1.00 mm
1.50 mm
2.00 mm
11