A1386 Datasheet, PDF (1/19 Pages) Allegro MicroSystems – 5 V Field-Programmable Linear Hall Effect Sensor IC with 3 V Supply Functionality, Analog Output, and Miniature Package Options

A1386
5 V Field-Programmable Linear Hall Effect Sensor IC
with 3 V Supply Functionality, Analog Output, and Miniature Package Options
Features and Benefits
• Low power consumption using 3 V supply
• Factory programmed sensitivity temperature coefficient
(0.13%/°C nominal)
• Programmability at end-of-line
• Ratiometric sensitivity, quiescent voltage output, and
clamps for interfacing with application DAC
• Temperature-stable quiescent voltage output and sensitivity
• Precise recoverability after temperature cycling
• Output voltage clamps provide short circuit diagnostic
capabilities
• Wide ambient temperature range: –40°C to 150°C
• Resistant to mechanical stress
• Miniature package options
Packages
3-pin ultramini SIP
1.5 mm × 4 mm × 3 mm
(suffix UA)
Description
The Allegro^® A1386 programmable, linear, Hall effect sensor
IC is designed for low power, high accuracy, and small package
size applications. The accuracy of this device is enhanced via
programmability on the output pin for end-of-line optimization
without the added complexity and cost of a fully programmable
device.
The A1386 has two operating modes, normal and low power.
In normal operation mode the A1386 operates much like its
predecessors, theA1381,A1382,A1383, andA1384, as a highly
accurate, user-programmable linear sensor IC with a ratiometric
output. In low power mode, the device actually disengages some
internal components in order to reduce power consumption.
Although the accuracy of the device is substantially reduced
during low power operation, it remains effective as a detector
of magnetic regions (such as north and south poles on a rotating
ring magnet). This unique feature allows the device to be used
in systems that are put to sleep, during which time there may
be only 3 V available, or in applications that have start-up
conditions where the available supply voltage may drop below
4.5 V for a period of time.
This ratiometric Hall effect device provides a voltage output
that is proportional to the applied magnetic field over the entire
Approximate scale
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Functional Block Diagram
V+
VCC
Chip Reference
Currents
To all subcircuits
C_BYPASS
A1386-DS, Rev. 3
Amp
Out
VOUT
GND
Hall Drive Circuit
Gain
Gain Temperature
Coefficient
Offset
Trim Control