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A1315 Datasheet

Linear Hall-Effect Sensor

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A1315
Linear Hall-Effect Sensor IC with Analog Output
Available in a Miniature, Low-Profile Surface-Mount Package
FEATURES AND BENEFITS
• 3.3 V supply operation
• QVO temperature coefficient programmed at Allegrofor
improved accuracy
• Miniature package options
• High-bandwidth, low-noise analog output
• High-speed chopping scheme minimizes QVO drift across
operating temperature range
• Temperature-stable quiescent voltage output and sensitivity
• Precise recoverability after temperature cycling
• Output voltage clamps provide short-circuit diagnostic
capabilities
• Undervoltage lockout (UVLO)
• Wide ambient temperature range: –40°C to 150°C
• Immune to mechanical stress
• Enhanced EMC performance for stringent automotive
applications
PACKAGES:
3-pin SOT23-W
2 mm × 3 mm × 1 mm
(suffix LH)
3-pin ultramini SIP,
1.5 mm × 4 mm × 3 mm
(suffix UA)
Not to scale
DESCRIPTION
New applications for linear output Hall-effect sensors, such
as displacement and angular position, require higher accuracy
and smaller package sizes. The Allegro A1315 linear Hall-
effect sensor IC has been designed specifically to meet both
requirements. These temperature-stable devices are available
in both surface-mount and through-hole packages.
The accuracy of each device is enhanced via end-of-line
optimization. Each device features non-volatile memory to
optimize device sensitivity and the quiescent voltage output
(QVO: output in the absence of a magnetic field) for a given
application or circuit. This A1315 optimized performance
is sustained across the full operating temperature range by
programming the temperature coefficient for both sensitivity
and QVO at Allegro end-of-line test.
These ratiometric Hall-effect sensor ICs provide a voltage output
that is proportional to the applied magnetic field. The quiescent
voltage output is adjusted around 50% of the supply voltage.
The features of these linear devices make them ideal for
use in automotive and industrial applications requiring high
accuracy, and operate across an extended temperature range,
–40°C to 150°C.
Each BiCMOS monolithic circuit integrates a Hall element,
temperature-compensating circuitry to reduce the intrinsic
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.
Continued on the next page…
V+
VCC
Functional Block Diagram
VOUT
CBYPASS
Sensitivity and
Sensitivity TC
Offset and
Offset TC
A1315-DS, Rev. 2
MCO-0000527
GND
January 6, 2020




Allegro

A1315 Datasheet Preview

A1315 Datasheet

Linear Hall-Effect Sensor

No Preview Available !

A1315
Linear Hall-Effect Sensor IC with Analog Output
Available in a Miniature, Low-Profile Surface-Mount Package
DESCRIPTION (CONTINUED)
The A1315 sensor IC is 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, ultramini, single inline package
(SIP) for through-hole mounting. Both packages are lead (Pb) free,
with 100% matte-tin leadframe plating.
SELECTION GUIDE
Part Number
Output
Polarity
Sensitivity
(typ) (mV/G)
A1315LLHLX-1-T
Forward
1.35
A1315LLHLX-2-T
Forward
2.5
A1315LLHLX-5-T
Forward
5
A1315LUA-2-T
Forward
2.5
A1315LUA-5-T
Forward
5
*Contact Allegrofor additional packing options
Packing*
10,000 pieces per reel
10,000 pieces per reel
10,000 pieces per reel
500 pieces per bag
500 pieces per bag
Package
3-pin SOT-23W surface mount
3-pin SOT-23W surface mount
3-pin SOT-23W surface mount
3-pin SIP through hole
3-pin SIP through hole
ABSOLUTE MAXIMUM RATINGS
Characteristic
Symbol
Forward Supply Voltage
Reverse Supply Voltage
Forward Output Voltage
Reverse Output Voltage
Output Source Current
VCC
VRCC
VOUT
VROUT
IOUT(SOURCE)
Output Sink Current
Operating Ambient Temperature
Maximum Junction Temperature
Storage Temperature
IOUT(SINK)
TA
TJ(max)
Tstg
VOUT to GND
VCC to VOUT
Range L
Notes
Rating
Unit
8
V
–0.1
V
7
V
–0.1
V
2
mA
10
mA
–40 to 150
°C
165
°C
–65 to 170
°C
THERMAL CHARACTERISTICS: May require derating at maximum conditions; see application information
Characteristic
Symbol
Test Conditions
Value
Package LH, 1-layer PCB with copper limited to solder pads
228
Package Thermal Resistance
RθJA
Package LH, 2-layer PCB with 0.463 in.2 of copper area each side con-
nected by thermal vias
110
Package UA, 1-layer PCB with copper limited to solder pads
165
Units
°C/W
°C/W
°C/W
2
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com



Part Number A1315
Description Linear Hall-Effect Sensor
Maker Allegro
Total Page 3 Pages
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A1315 Datasheet PDF





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