A1363 Datasheet, PDF (1/30 Pages) Allegro MicroSystems – Low Noise, High Precision, Programmable Linear Hall Effect Sensor IC

A1363
Low Noise, High Precision, Programmable Linear Hall Effect Sensor IC
With Advanced Temperature Compensation and High Bandwidth (120 kHz) Analog Output
FEATURES AND BENEFITS
• Proprietary segmented linear interpolated temperature
compensation (TC) technology provides a typical
accuracy of 1% across the full operating temperature
range
• Customer programmable, high resolution offset and
sensitivity trim
• Factory programmed sensitivity and quiescent
output voltage TC with extremely stable temperature
performance
• High sensitivity Hall element for maximum accuracy
• Extremely low noise and high resolution achieved via
proprietary Hall element and low noise amplifier circuits
• 120 kHz nominal bandwidth achieved via proprietary
packaging and chopper stabilization techniques
• Patented circuits suppress IC output spiking during fast
current step inputs
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Package: 4-pin SIP (suffix KT)
1 mm case thickness
Not to scale
DESCRIPTION
The Allegro™ A1363 programmable linear Hall-effect
current sensor IC has been designed to achieve high accuracy
and resolution without compromising bandwidth. The goal
is achieved through new proprietary linearly interpolated
temperature compensation technology that is programmed
at the Allegro factory and provides sensitivity and offset that
are virtually flat across the full operating temperature range.
Temperature compensation is done in the digital domain with
integrated EEPROM technology, without sacrificing the analog
signal path 120 kHz bandwidth, making this device ideal for
HEV inverter, DC-to-DC converter, and electric power steering
(EPS) applications.
This ratiometric Hall-effect sensor IC provides a voltage output
that is proportional to the applied magnetic field. The customer
can conFigure the sensitivity and quiescent (zero field) output
voltage through programming on the VCC and output pins, to
optimize performance in the end application. The quiescent
output voltage is user-adjustable around 50% of the supply
voltage, V_CC , and the output sensitivity is adjustable within
the range of 0.6 to 14 mV/G.
The sensor IC incorporates a highly sensitive Hall element with
a BiCMOS interface integrated circuit that employs a low noise
small-signal high-gain amplifier, a clamped low-impedance
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V+
VCC
(Programming)
C _BYPASS
A1363-DS, Rev. 6
To all subcircuits
Temperature
Sensor
Programming
Control
EEPROM and
Control Logic
Sensitivity Control
Offset Control
Signal Recovery
GND
Functional Block Diagram
VOUT
(Programming)
C_L