A1381, A1383, and A1384
Programmable Linear Hall Effect Sensor ICs with Analog Output
Available in a Miniature Thin Profile Surface Mount Package
Discontinued PrNot forLast T New Designime Buyoduct
These parts are no longer in production These parts are in production but have been determined to be These parts are in production but have been determined to be The device should not be
LASTpurchased for new design applications. Samples are no longer available.NOT FOR NEW TIME BUY DESIGN. . This classification indicates that the product is This classification indicates that sale of
obsolete and notice has been given. Sale of this device is currently this device is currently restricted to existing customer applications.
restricted to existing customer applications. The device should not be purchased for new design applications The device should not be
purchased for new design applications because of obsolescence in the because obsolescence in the near future is probable. Samples are no
near future. Samples are no longer available.longer available.
Date of status change: December 1, 2015Date of status change: February 1, 2006
Date of status change: April 2003
Deadline for receipt of LAST TIME BUY orders: April 28, 2006
Recommended Substitutions:
For existing customer transition, and for new customers or new appli-
cations, refer to the A1389.
NOTE: For detailed information on purchasing options, contact your
local Allegro field applications engineer or sales representative.
Allegro MicroSystems, LLC reserves the right to make, from time to time, revisions to the anticipated product life cycle plan
for a product to accommodate changes in production capabilities, alternative product availabilities, or market demand. The
information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, LLC assumes no respon-
sibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use.Preliminary Data Sheet A1381, A1383, and A1384
Subject to Change Without Notice
September 14, 2004
Programmable Linear Hall Effect Sensor ICs with Analog Output
Available in a Miniature Thin Profile Surface Mount Package
Features and Benefits Description
Customer programmable offset, sensitivity, sensitivity New applications for linear output Hall effect sensing, such
temperature coefficient, and polarity as displacement, angular position, and current measurement,
Programmability at end-of-line require high accuracy in conjunction with small package size.
Ratiometric sensitivity, quiescent voltage output, and The Allegro A138x family of programmable linear Hall effect
clamps for interfacing with application DAC sensor ICs was designed specifically to achieve both goals.
Temperature-stable quiescent voltage output These temperature-stable devices are available in a miniature
and sensitivity surface mount package (SOT23-W) and an ultramini through-
Precise recoverability after temperature cycling hole single-in-line package. The accuracy of these devices is
Output voltage clamps provide short circuit enhanced via programmability on the output pin for end-of-line
diagnostic capabilities optimization without the added complexity and cost of a fully
Wide ambient temperature range: 40C to 150C programmable device.
Immune to mechanical stress
These ratiometric Hall effect devices provide a voltage output
Miniature package options
that is proportional to the applied magnetic field. Both the
quiescent voltage output and magnetic sensitivity are user-
adjustable. The quiescent voltage output can be set around
Packages: 3-pin SOT23W (suffix LH), and
50% of the supply voltage, and the sensitivity adjusted between
3-pin SIP (suffix UA)
2 mV/G and 9 mV/G over the device family. Programming
se l e c t i o n s a l so e x i st f o r o u t p u t p o l a r i t y a n d t e m p e r a t u r e
compensation. The features of this linear family make it ideal
for high accuracy requirements of automotive and industrial
applications, and operate across an extended temperature range,
40C to 150C.
Continued on the next page
Not to scale
Functional Block Diagram
V+
VCC
To all subcircuits
VOUT
Amp Out
(Programming)
C
BYPASS
Hall Drive Circuit
Gain Temperature
Gain Offset
Coefficient
Trim Control
Engineering samples available on a limited basis. Contact your local
GND sales or applications support office for additional information.
A1381-DS, Rev. 13
Dynamic Offset
Cancellation
Filter