Output voltage proportional to magnetic flux density
Ratiometric rail-to-rail output
Improved sensitivity
4.5 to 5.5 V operation
Immunity to mechanical stress
Solid-state reliability
Robust EMC protection
Description
The A132X family of linear Hall-effect sensors are optimized,
sensitive, and temperature-stable. These ratiometric Hall-effect
sensors provide a voltage output that is proportional to the
applied magnetic field. The A132X family has a quiescent
output voltage that is 50% of the supply voltage and output
sensitivity options of 2.5mV/G, 3.125mV/G, and 5mV/G. The
features of this family of devices are ideal for use in the harsh
environments found in automotive and industrial linear and
rotary position sensing systems.
Each device has a BiCMOS monolithic circuit which integrates
a Hall element, improved temperature-compensating circuitry
to reduce the intrinsic sensitivity drift of the Hall element,
a small-signal high-gain amplifier, and a rail-to-rail low-
impedance output stage.
Packages: 3 pin SOT23W (suffix LH), and
3 pin SIP (suffix UA)
A proprietary dynamic offset cancellation technique, with
an internal high-frequency clock, reduces the residual offset
voltage normally caused by device overmolding, temperature
dependencies, and thermal stress. The high frequency clock
allows for a greater sampling rate, which results in higher
accuracy and faster signal processing capability. This technique
produces devices that have an extremely stable quiescent output
voltage, are immune to mechanical stress, and have precise
Continued on the next page…
Not to scale
Functional Block Diagram
V+
VCC
Dynamic Offset
Cancellation
Filter
Amp
Out
VOUT
Gain
0.1
μF
Offset
Trim
Control
GND
A1321-DS, Rev. 8
A1321, A1322,
and
A1323
Ratiometric Linear Hall Effect Sensor
for High-Temperature Operation
The A132X family is provided in a 3-pin single in-line package
(UA) and a 3-pin surface mount package (LH). Each package is
available in a lead (Pb) free version (suffix, –T) , with a 100% matte
tin plated leadframe.
Description (continued)
recoverability after temperature cycling. Having the Hall element
and an amplifier on a single chip minimizes many problems normally
associated with low-level analog signals.
Output precision is obtained by internal gain and offset trim adjustments
made at end-of-line during the manufacturing process.
Selection Guide
Part Number
A1321ELHLT-T
A1321EUA-T
A1321LLHLT-T
A1321LUA-T
A1322ELHLT-T
A1322EUA-T
A1322LLHLT-T
A1322LUA-T
A1323ELHLT-T
A1323EUA-T
A1323LLHLT-T
A1323LUA-T
1
Pb-based
Pb-free
1
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Packing
2
7-in. reel, 3000 pieces/reel
Bulk, 500 pieces/bag
7-in. reel, 3000 pieces/reel
Bulk, 500 pieces/bag
7-in. reel, 3000 pieces/reel
Bulk, 500 pieces/bag
7-in. reel, 3000 pieces/reel
Bulk, 500 pieces/bag
7-in. reel, 3000 pieces/reel
Bulk, 500 pieces/bag
7-in. reel, 3000 pieces/reel
Bulk, 500 pieces/bag
Mounting
Surface Mount
SIP through hole
Surface Mount
SIP through hole
Surface Mount
SIP through hole
Surface Mount
SIP through hole
Surface Mount
SIP through hole
Surface Mount
SIP through hole
Ambient, T
A
(ºC)
–40 to 85
Sensitivity,
Typ. (mV/G)
5.000
–40 to 150
–40 to 85
3.125
–40 to 150
–40 to 85
2.500
–40 to 150
variants are being phased out of the product line.
a. Certain variants cited in this footnote are in production but have been determined to be LAST TIME BUY. This classification indicates that sale of this device is
currently restricted to existing customer applications. The device should not be purchased for new design applications because obsolescence in the near future is
probable. Samples are no longer available. Status change: October 31, 2006. Deadlilne for receipt of LAST TIME BUY ORDERS: April 27, 2007. These variants
include: A1322ELHLT, A1322EUA, and A1323LLHLT.
b. Certain variants cited in this footnote are in production but have been determined to be NOT FOR NEW DESIGN. This classification indicates that sale of this
device is currently restricted to existing customer applications. The device should not be purchased for new design applications because obsolescence in the near
future is probable. Samples are no longer available. Status change: May 1, 2006. These variants include: A1321ELHLT, A1321EUA, A1321LLHLT, A1321LUA,
A1322LLHLT, A1322LUA, A1323ELHLT, A1323EUA, and A1323LUA.
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