A1377 Datasheet, PDF (1/25 Pages) Allegro MicroSystems – Highly Programmable Linear Hall-Effect Sensor IC

A1377
Highly Programmable Linear Hall-Effect Sensor IC
FEATURES AND BENEFITS
• On-board diagnostics
□□Broken ground detection
□□V_CC undervoltage detection
□□V_CC overvoltage detection
• Customer-programmable offset, sensitivity, polarity, and
output clamps
• Integrated power supply and output bypass capacitors
• Customer and factory access code for enhanced
reliability
□□Factory code required for write access to TC trim and
other factory registers
□□Customer code required for write access to customer
registers
Continued on the next page…
PACKAGE: 3-pin SIP (suffix UC)
Not to scale
DESCRIPTION
The Allegro^™ A1377 programmable linear Hall-effect sensor
IC is designed for applications that require high accuracy
and high resolution without compromising bandwidth. The
A1377 employs segmented, linearly interpolated temperature
compensation technology. This improvement greatly reduces
the total error of the device across the whole temperature
range. As a result, the device is ideally suited for sensing in
numerous automotive applications, such as linear and rotary
position sensors in actuators and valves.
Available in a through-hole, small form factor, single in-line
package (SIP), the A1377 Hall-effect sensor IC has a broad
range of sensitivity and offset operating bandwidth. The
accuracy and flexibility of this device is enhanced with user
programmability, via the VCC and 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
voltage output (QVO) is user-adjustable from approximately
5% to 95% of the supply voltage. The device sensitivity is
adjustable within the range of 1 to 14 mV/G.
The features of this linear device make it ideal for use in
automotive and industrial applications requiring high accuracy,
and apply across an extended temperature range, from –40°C
to 150°C.
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VCC
(Programming)
100 nF
A1377-DS, Rev. 1
A1377
IC
Undervoltage
and Overvoltage
Detection
Regulator
Level
Detector
To all
subcircuits
Pulse
Generator
EEPROM
Broken
Ground
Detection
Temperature
Sensor
Sensitivity
Control
Control Logic
Active
Temperature
Compensation
Offset
Control
Output
Clamps
Address
Decoding
Transmit and
Receive Control
Signal Recovery
Push-
Pull
GND
Functional Block Diagram
VOUT
(Programming)
100 nF