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3517 Datasheet(PDF) 2 Page - Allegro MicroSystems

Part No. 3517
Description  RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMPERATURE OPERATION
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Maker  ALLEGRO [Allegro MicroSystems]
Homepage  http://www.allegromicro.com
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The A3517xUA and A3518xUA 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 approxi-
mately 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 A3517xUA features an output sensitivity of 5 mV/G while
the A3518xUA 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 recoverability 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 reduced-cost devices are supplied in a 3-pin ultra-mini-SIP “UA”
package only.
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., A3517SUA .
RATIOMETRIC, LINEAR HALL-EFFECT SENSORS
FOR HIGH-TEMPERATURE OPERATION
Dwg. PH-006
1
V
CC
3
2
Pinning is shown viewed from branded side.
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 S– .................... -20
°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.
3517 AND
3518




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