A1367 Datasheet, PDF (1/27 Pages) Allegro MicroSystems – Low-Noise, High-Precision, Programmable Linear Hall-Effect Sensor IC

A1367
Low-Noise, High-Precision, Programmable Linear Hall-Effect Sensor IC
with Regulated Supply, Advanced Temperature Compensation,
and High-Bandwidth (240 kHz) Analog Output
FEATURES AND BENEFITS
• 240 kHz nominal bandwidth achieved via proprietary
packaging and chopper stabilization techniques
• On-board supply regulator with reverse-battery protection
• Proprietary segmented linear temperature compensation
(TC) technology provides a typical accuracy of 1% over
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
Continued on the next page…
PACKAGE:
4-Pin SIP (suffix KT)
DESCRIPTION
The Allegro™ A1367 programmable linear Hall-effect
current sensor IC has been designed to achieve high accuracy
and resolution without compromising bandwidth. This 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 performed in the digital domain
with integrated EEPROM technology while maintaining a
240 kHz bandwidth analog signal path, 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% (bidirectional
configuration) or 10% (unidirectional configuration) of the
supply voltage, V_CC, and the output sensitivity is adjustable
within the range of 0.6 to 6.4 mV/G.
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Not to scale
VCC
(Programming)
C_BYPASS
A1367-DS, Rev. 1
Regulator
Programming
Control
To all
subcircuits
Temperature
Sensor
Sensitivity Control
Charge Pump
Pulse Generator
Undervoltage
Detection
Broken
Ground
Detection
EEPROM and
Control Logic
Active Temp.
Compensation
Offset Control
Output
Clamps
Signal Recovery
Push/Pull
Output Driver
GND
Functional Block Diagram
VOUT
(Programming)
C_L