A3515 and A3516
Ratiometric, Linear Hall-Effect Sensors
for High-Temperature Operation
Not for New Design
These parts 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.
Date of status change: May 2, 2005
Recommended Substitutions:
For new customers or new applications:
• for the A3515, please refer to the Allegro
A1321,
and
• for the A3516, please refer to the Allegro
A1323.
NOTE: For detailed information on purchasing options, contact your
local Allegro field applications engineer or sales representative.
Allegro MicroSystems, Inc. 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, Inc. assumes no responsibility for its use; nor
for any infringements of patents or other rights of third parties which may result from its use.
3515
3516
AND
RATIOMETRIC, LINEAR HALL-EFFECT SENSORS
FOR HIGH-TEMPERATURE OPERATION
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.
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.
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.
This technique produces 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.
D a ta Sh e e t
2 75 01 . 1 0 D
V
CC
1
X
2
3
GROUND
Dwg. PH-006
Pinning is shown viewed from branded side.
OUTPUT
SUPPLY
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V
CC
..............................
8.0 V
Output Voltage, V
O
................................
8.0 V
Output Sink Current, I
O
.......................
10 mA
Magnetic Flux Density, B ..............
Unlimited
Package Power Dissipation,
P
D
...........................................
See Graph
Operating Temperature Range*, T
A
Suffix ‘E–’ .....................
-40
°
C to +85
°
C
Suffix ‘L–’ ....................
-40
°
C to +150
°
C
Storage Temperature Range,
T
S
..................................
-65
°
C to +170
°
C
* Infrequent excursions permitted; see
Applications Information.
FEATURES
■
Temperature-Stable Quiescent Output Voltage
■
Precise Recoverability After Temperature Cycling
■
Output Voltage Proportional to Applied Magnetic Field
■
Ratiometric Rail-to-Rail Output
■
Improved Sensitivity
■
4.5 V to 5.5 V Operation
■
Immune to Mechanical Stress
■
Small Package Size
■
Solid-State Reliability
Always order by complete part number, e.g.,
A3515LUA
.
3515
AND
3516
RATIOMETRIC,
LINEAR
HALL-EFFECT SENSORS
MAGNETIC CHARACTERISTICS over operating temperature range, at V
CC
= 5 V, I
O
= -1 mA
(unless otherwise noted).
Part Numbers
A3515EUA
Characteristic*
Operating Temp. Range, T
A
Sensitivity at T
A
= 25°C
∆Sens
(∆T)
at T
A
= Max.
∆Sens
(∆T)
at T
A
= Min.
∆V
OQ(∆T)†
Ratiometry,
∆V
OQ(∆V)
Ratiometry,
∆Sens
(∆V)
Positive Linearity, Lin+
Negative Linearity, Lin–
Symmetry
Min. Typ. Max.
-40
–
+85
A3515LUA
Min. Typ. Max.
-40
–
+150
A3516EUA
Min. Typ. Max.
-40
–
+85
A3516LUA
Min. Typ. Max.
-40
–
+150
Units
°C
mV/G
%
%
G
%
%
%
%
%
4.50 5.00 5.50
-2.5
2.5
7.5
1.0
±10
–
–
–
–
–
4.50 5.00 5.50
-2.5
2.5
7.5
1.0
±10
–
–
–
–
–
2.25 2.50 2.75
-2.5
2.5
7.5
1.0
±10
–
–
–
–
–
2.25 2.50 2.75
-2.5
2.5
7.5
1.0
±10
–
–
–
–
–
-9.0 -1.3
–
–
–
–
–
–
–
100
100
100
100
100
-9.0 -1.3
–
–
–
–
–
–
–
100
100
100
100
100
-9.0 -1.3
–
–
–
–
–
–
–
100
100
100
100
100
-9.0 -1.3
–
–
–
–
–
–
–
100
100
100
100
100
NOTE 1 – Magnetic flux density is measured at most sensitive area of device located 0.0195" (0.50 mm) below the branded face of
the “UA” package.
NOTE 2 – 10 G = 1 mT, exactly.
NOTE 3 – Except for
∆Sens
(∆T)
, typical data is at T
A
= 25°C and is for design information only.
* See Characteristics Definitions for test conditions.
† This calculation (formula 1, next page) yields the device’s equivalent accuracy, over the operating temperature range, in gauss.
4
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