A1318 and A1319
Linear Hall-Effect Sensor ICs with Analog Output
Available in a Miniature, Low Profile Surface Mount Package
Features and Benefits Description
3.3 V supply operation New applications for linear output Hall-effect sensors, such
QVO temperature coefficient programmed at Allegro for as displacement and angular position, require higher accuracy
improved accuracy and smaller package sizes. The Allegro A1318 and A1319
Miniature package options linear Hall-effect sensor ICs have been designed specifically to
High bandwidth, low noise analog output meet both requirements. These temperature-stable devices are
High speed chopping scheme minimizes QVO drift across available in both surface-mount and through hole packages.
operating temperature range
The accuracy of each device is enhanced via end-of-line
Temperature-stable quiescent voltage output and sensitivity
optimization. Each device features non-volatile memory to
Precise recoverability after temperature cycling
optimize device sensitivity and the quiescent voltage output
Output voltage clamps provide short circuit diagnostic
(QVO: output in the absence of a magnetic field) for a given
capabilities
application or circuit. This A1318 and A1319 optimized
Undervoltage lockout (UVLO)
performance is sustained across the full operating temperature
Wide ambient temperature range: 40C to 150C
range by programming the temperature coefficient for both
Immune to mechanical stress
sensitivity and QVO at Allegro end-of-line test.
Enhanced EMC performance for stringent automotive
applications These ratiometric Hall-effect sensor ICs provide a voltage
output that is proportional to the applied magnetic field. The
3-pin ultramini SIP
Packages
quiescent voltage output is adjusted around 50% of the supply
1.5 mm 4 mm 3 mm
voltage.
3-pin SOT23-W
(suffix UA)
2 mm 3 mm 1 mm
The features of these linear devices make them ideal for
(suffix LH)
use in automotive and industrial applications requiring high
accuracy, and operate across an extended temperature range,
40C to 150C.
Each BiCMOS monolithic circuit integrates a Hall element,
temperature-compensating circuitry to reduce the intrinsic
Continued on the next page
Approximate footprint
Functional Block Diagram
V+
VCC
VOUT
C Sensitivity and Offset and
BYPASS
Sensitivity TC Offset TC
GND
A1318-DS, Rev. 1.
Dynamic Offset
Cancellation
Tuned FilterA1318 and
Linear Hall-Effect Sensor ICs with Analog Output
Available in a Miniature, Low Profile Surface Mount Package
A1319
Description (continued)
sensitivity drift of the Hall element, a small-signal high-gain amplifier,
a clamped low-impedance output stage, and a proprietary dynamic
offset cancellation technique.
The A1318 and A1319 sensor ICs are offered in two package styles.
The LH is a SOT-23W style, miniature, low profile package for
surface-mount applications. The UA is a 3-pin, ultra-mini, single
inline package (SIP) for through-hole mounting. Both packages are
lead (Pb) free, with 100% matte tin leadframe plating.
Selection Guide
Output Sensitivity
Part Number Packing* Package
Polarity (typ) (mV/G)
A1318LLHLX-1-T Forward 1.35 10,000 pieces per reel 3-pin SOT-23W surface mount
A1318LLHLX-2-T Forward 2.5 10,000 pieces per reel 3-pin SOT-23W surface mount
A1318LUA-2-T Forward 2.5 500 pieces per bag 3-pin SIP through hole
A1319LLHLX-5-T Forward 5 10,000 pieces per reel 3-pin SOT-23W surface mount
A1319LUA-5-T Forward 5 500 pieces per bag 3-pin SIP through hole
*Contact Allegro for additional packing options
Absolute Maximum Ratings
Characteristic Symbol Notes Rating Unit
Forward Supply Voltage V 8 V
CC
Reverse Supply Voltage V 0.1 V
RCC
Forward Output Voltage V 7 V
OUT
Reverse Output Voltage V 0.1 V
ROUT
Output Source Current I VOUT to GND 2 mA
OUT(SOURCE)
Output Sink Current I VCC to VOUT 10 mA
OUT(SINK)
Operating Ambient Temperature T Range L 40 to 150 C
A
Maximum Junction Temperature T (max) 165 C
J
Storage Temperature T 65 to 170 C
stg
Allegro MicroSystems, LLC
2
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com