A1365 Datasheet, PDF (1/32 Pages) Allegro MicroSystems – Low-Noise, High-Precision, Programmable Linear Hall-Effect Sensor IC

A1365
Low-Noise, High-Precision, Programmable Linear Hall-Effect Sensor IC
With High-Bandwidth (120 kHz) Analog Output and Integrated Fault Comparator
FEATURES AND BENEFITS
• Proprietary segmented linear temperature compensation
(TC) technology provides a typical accuracy of 1% over
the full operating temperature range
• 120 kHz nominal bandwidth achieved via proprietary
packaging and chopper stabilization techniques
• Over Field Fault signal with 6-bit programmable trigger
levels, 2-bit programmable hysteresis, and latching or
non-latching behavior
• Over Field Fault response time < 4.5 μs (typ)
• Extremely low noise and high resolution achieved via
proprietary Hall element and low-noise amplifier circuits
• Customer-programmable, high-resolution offset and
sensitivity trim
• Available in a 1-mm-thick SIP through-hole package
• Factory-programmed sensitivity and quiescent
output voltage TC with extremely stable temperature
performance
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PACKAGE:
4-Pin SIP (suffix KT)
Not to scale
DESCRIPTION
The A1365 linear output Hall-effect sensor IC is specifically
designed to provide a highly accurate output with improved
resolution at high bandwidth for use in current-sensing
applications. This device employs a segmented, linearly
interpolated temperature compensation technology, which
provides greater accuracy in sensitivity and offset voltage
trimming and hence virtually zero temperature drift. This
improvement greatly reduces the total error of the device across
the operating temperature range.
The highly programmable Over Field Fault signal (FAULT
pin) can be used to detect a high magnetic field condition.
Broken ground wire detection, undervoltage lockout for V_CC
below specification, and user-selectable output voltage clamps
are also included, which are important for high reliability in
automotive applications. The sensor accuracy and diagnostic
capability make it ideally suited for automotive sockets such
as HEV inverter and DC-to-DC converter applications.
The A1365 Hall-effect sensor IC is extremely sensitive, fast,
and temperature-stable. The accuracy and flexibility of this
device is enhanced by user programmability, performed via
the V_CC supply and the output pins, which allows the device
to be optimized in the application.
This ratiometric Hall-effect sensor IC provides a voltage output
that is proportional to the applied magnetic field. The quiescent
output voltage is user-adjustable around 50% (bidirectional) of
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V+
VCC (Programming)
C_BYPASS
Temperature
Sensor
Programming
Control
EEPROM and
Control Logic
6 bits
Sensitivity Control
Offset Control
Signal Recovery
6-Bit Programmable Window Comparator
V_REF(High) _–
0.88 × V_CC to 0.72 × V_CC
COMP_IN ⁺
–
V_REF(Low) ₊
0.12 × V_CC to 0.28 × V_CC
Internal
Pull-Up
FAULT
VOUT
(Programming)
A1365-GS-DS
GND
Functional Block Diagram