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PDF 3515 Data sheet ( Hoja de datos )

Número de pieza 3515
Descripción (3515 / 3516) Linear Hall-effect Sensors
Fabricantes Allegro Micro Systems 
Logotipo Allegro Micro Systems Logotipo



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3515 AND
3516
RATIOMETRIC, LINEAR HALL-EFFECT SENSORS
FOR HIGH-TEMPERATURE OPERATION
V
CC
The A3515– and A3516– are sensitive, temperature-stable linear Hall-
effect sensors with greatly improved offset characteristics. Ratiometric, linear
Hall-effect sensors provide a voltage output that is proportional to the applied
magnetic field and have a quiescent output voltage that is approximately 50%
of the supply voltage. These magnetic sensors are ideal for use in linear and
rotary position sensing systems in the harsh environments of automotive and
industrial applications over extended temperatures to -40°C and +150°C. The
A3515– features an output sensitivity of 5 mV/G, while the A3516– has an
output sensitivity of 2.5 mV/G. See the Magnetic Characteristics table for
complete, individual device parametrics.
12
3
Each BiCMOS monolithic circuit 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.
Dwg. PH-006
Pinning is shown viewed from branded side.
A proprietary dynamic offset cancelation technique, with an internal
high-frequency clock, reduces the residual offset voltage, which is normally
caused by device overmolding, temperature dependancies, and thermal stress.
Thiswwtwe.DcahtanShieqetu4Ue.copmroduces devices that have an extremely stable quiescent
output voltage, are immune to mechanical stress, and have precise recover-
ability after temperature cycling. Many problems normally associated with
low-level analog signals are minimized by having the Hall element and
amplifier in a single chip. Output precision is obtained by internal gain and
offset trim adjustments during the manufacturing process.
These devices are supplied in a 3-pin ultra-mini-SIP ‘UA’ package.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VCC .............................. 8.0 V
Output Voltage, VO ................................ 8.0 V
Output Sink Current, IO ....................... 10 mA
Magnetic Flux Density, B .............. Unlimited
Package Power Dissipation,
PD ........................................... See Graph
Operating Temperature Range*, TA
Suffix ‘E–’ ..................... -40°C to +85°C
Suffix ‘L–’ .................... -40°C to +150°C
Storage Temperature Range,
TS .................................. -65°C to +170°C
* Infrequent excursions permitted; see
Applications Information.
FEATURES
s Temperature-Stable Quiescent Output Voltage
s Precise Recoverability After Temperature Cycling
s Output Voltage Proportional to Applied Magnetic Field
s Ratiometric Rail-to-Rail Output
s Improved Sensitivity
s 4.5 V to 5.5 V Operation
s Immune to Mechanical Stress
s Small Package Size
s Solid-State Reliability
Always order by complete part number, e.g., A3515LUA .

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3515 pdf
3515 AND 3516
RATIOMETRIC,
LINEAR
HALL-EFFECT SENSORS
CHARACTERISTICS DEFINITIONS
Quiescent Voltage Output. In the quiescent state (no mag-
netic field), the output is ideally equal to one-half of the supply
voltage over the operating voltage and temperature range (VOQ
VCC/2). Due to internal component tolerances and thermal
considerations, there is a tolerance on the quiescent voltage
output and on the quiescent voltage output as a function of
supply voltage and ambient temperature. For purposes of
specification, the quiescent voltage output as a function of
temperature is defined as
VOQ(T)
=
VOQ(TA) – VOQ(25°C)
Sens(25°C)
(1)
This calculation yields the device’s equivalent accuracy,
over the operating temperature range, in gauss.
Sensitivity. The presence of a south-pole magnetic field
perpendicular to the package face (the branded surface) will
increase the output voltage from its quiescent value toward the
supply voltage rail by an amount proportional to the magnetic
field applied. Conversely, the application of a north pole will
decrease the output voltage from its quiescent value. This
proportionality is specified as the sensitivity of the device and
is defined as
Sens = VO(500G) – VO(-500G)
1000 G
(2)
The stability of sensitivity as a function of temperature is
defined as
Sens(T)
=
Sens(TA) – Sens(25°C)
Sens(25°C)
x
100%
(3)
Ratiometry. The A3515xUA and A3516xUA feature a
ratiometric output. The quiescent voltage output and sensitivity
are proportional to the supply voltage (ratiometric).
The per cent ratiometric change in the quiescent voltage
output is defined as
VOQ(V)
=
VOQ(VCC) / VOQ(5V)
VCC / 5 V
x 100%
(4)
and the per cent ratiometric change in sensitivity is defined as
Sens(V)
=
Sens(VCC)
VCC /
/ Sens(5V)
5V
x 100%
(5)
Linearity and Symmetry. The on-chip output stage is de-
signed to provide a linear output to within 500 mV of either rail
with a supply voltage of 5 V. This is equivalent to approxi-
mately ±800 gauss of ambient field. Although application of
stronger magnetic fields will not damage these devices, it will
force the output into a non-linear region. Linearity in per cent
is measured and defined as
Lin+ = VO(500G) – VOQ x 100%
2 (VO(250G) – VOQ)
(6)
Lin– = VO(-500G) – VOQ x 100%
2 (VO(-250G) – VOQ)
and output symmetry as
(7)
Sym = VO(500G) – VOQ x 100%
VOQ – VO(-500G)
(8)
www.allegromicro.com
5

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3515 arduino
3515 AND 3516
RATIOMETRIC,
LINEAR
HALL-EFFECT SENSORS
Surface-Mount Lead Form (add ‘-TL’ to part number)
Dimensions in Inches
(controlling dimensions)
Dimensions in Millimeters
(for reference only)
0.002
MAX
0.095
±0.005
0.004 0°8°
MAX
0.020
MIN
FLAT
Dwg. MH-015 in
NOTE: Supplied in bulk pack (500 devices per bag).
0.051
MAX
2.41
±0.13
0.10 0°8°
MAX
0.51
MIN
FLAT
Dwg. MH-015 mm
www.allegromicro.com
The products described herein are manufactured under one or more
of the following U.S. patents: 5,045,920; 5,264,783; 5,442,283;
5,389,889; 5,581,179; 5,517,112; 5,619,137; 5,621,319; 5,650,719;
5,686,894; 5,694,038; 5,729,130; 5,917,320; and other patents
pending.
Allegro MicroSystems, Inc. reserves the right to make, from time to
time, such departures from the detail specifications as may be required
to permit improvements in the performance, reliability, or
manufacturability of its products. Before placing an order, the user is
cautioned to verify that the information being relied upon is current.
Allegro products are not authorized for use as critical components
in life-support appliances, devices, or systems without express written
approval.
The information included herein is believed to be accurate and
reliable. However, Allegro MicroSystems, Inc. assumes no responsibil-
ity for its use; nor for any infringements of patents or other rights of
third parties that may result from its use.
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