A1373LKB Allegro Microsystems Inc, A1373LKB Datasheet - Page 2

• Manufacturer Part Number: A1373LKB
• Description: IC SENSOR HALL EFFECT PREC 3-SIP
• Manufacturer: Allegro Microsystems Inc
• Type: Bipolar or Unipolar, Programmabler

Specifications of A1373LKB

• Sensing Range: 1.75mV/G ~ 11.25mV/G
• Voltage - Supply: 4.5 V ~ 5.5 V
• Current - Supply: 10mA
• Current - Output (max): 10mA
• Output Type: Analog, Ratiometric
• Features: High Precision
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 3-SIP
• Magnetic Type: Unipolar
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Output Current: 10mA
• Package Type: SIP
• Pin Count: 3
• Mounting: Through Hole
• Operating Temp Range: -40C to 150C
• Operating Temperature Classification: Automotive
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Features and Benefits
▪ Output pin programming
▪ Field-programmable for optimal application integration
▪ Selectable coarse and fine gain and quiescent output voltage
▪ Selectable sensitivity temperature coefficient
▪ Selectable output clamp voltage level, including
▪ Selectable output polarity
▪ Unipolar or bipolar operation
▪ Ratiometric sensitivity, clamps, and quiescent output voltage
▪ Chopper-stabilized Hall technique
▪ Wide operating temperature range
▪ On-chip regulator for over/under voltage protection
▪ On-chip regulator provides EMI robustness
▪ Wide lead-spacing with KB package
Package: 3 pin SIP (suffix KB)
Not to scale
A1373-DS, Rev. 12
no-clamp (rail-to-rail)
Pin 1
VCC
High Precision, Output Pin Programmable
GND
Pin 2
Functional Block Diagram
Regulator
Voltage
Amp
Gain
Hall drive circuit
To all subcircuits
Temperature
Trim Control
Coefficient
Description
The A1373 and A1374 high precision linear Hall effect
sensor ICs are sensitive, temperature stable, linear devices
with externally programmable features. This device family
incorporates a chopper-stabilized amplifier, voltage regulator,
programming logic, and an output amplifier on a single IC.
The patented dynamic offset cancellation used with a chopper-
stabilization technique provides extremely low offset and
minimal temperature drift. A high frequency clock is used for
chopping, to ensure high frequency signal processing capability.
The A1373 and A1374 are ideal for use in automotive and
industrial linear position-sensing applications that require
increased reliability and accuracy over conventional contacting-
potentiometer solutions. Key applications include: throttle
position sensors, pedal position sensors, and suspension height
sensors.
The design and manufacturing flexibility of the A1373 and
A1374 complement the Allegro linear Hall effect family of
devices by offering programmable gain, quiescent offset voltage
for unipolar or bipolar operation, temperature coefficient,
clamps, and polarity. The device can be set up in a magnetic
circuit and programmed with a train of serial pulses via the output
Continued on the next page…
Linear Hall Effect Sensor ICs
Offset
Out
A1373 and A1374
VOUT
Pin 3