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PDF 3507 Data sheet ( Hoja de datos )
| Número de pieza | 3507 | |
| Descripción | RATIOMETRIC/ LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMPERATURE OPERATION | |
| Fabricantes | Allegro MicroSystems | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de 3507 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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3507 AND
3508
RATIOMETRIC, LINEAR HALL-EFFECT SENSORS
FOR HIGH-TEMPERATURE OPERATION
V
CC
12
3
Dwg. PH-006
Pinning is shown viewed from branded side.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VCC . . . . . . . . . . . . 6.0 V
Output Voltage, VO . . . . . . . . . . . . . 6.0 V
Output Sink Current, IO . . . . . . . . 5.0 mA
Magnetic Flux Density, B . . . . Unlimited
Package Power Dissipation,
PD . . . . . . . . . . . . . . . . . . . . See Graph
Operating Temperature Range, TA
Suffix ‘S–’ . . . . . . . . . . . . -20°C to +85°C
Suffix ‘E–’ . . . . . . . . . . . . -40°C to +85°C
Suffix ‘L–’ . . . . . . . . . . . -40°C to +150°C
Storage Temperature Range,
T ...............
S
-65°C to +170°C
The A3507– and A3508– are sensitive, temperature-stable linear
Hall-effect sensors. 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 two devices are similar except for temperature stability over the
operating temperature range. See the Magnetic Characteristics table for
complete, individual device parametrics.
Each monolithic circuit integrates a quadratic Hall element, im-
proved 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. 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.
The first character of the part number suffix determines the device
operating temperature range: suffix ‘S–’ is for -20°C to +85°C, suffix
‘E–’ is for -40°C to +85°C, and suffix ‘L–’ is for -40°C to +150°C.
These devices are supplied in a 3-pin ultra-mini-SIP ‘–UA’ package.
FEATURES
I Output Voltage Proportional to Applied Magnetic Field
I Ratiometric Rail-to-Rail Output
I Improved Sensitivity
I Superior Temperature Stability
I 4.5 V to 5.5 V Operation
I Small Package Size
I Solid-State Reliability
Always order by complete part number, e.g., A3507EUA .
1 page  
APPLICATIONS INFORMATION
Calibrated linear Hall devices, which can be used to
determine the actual flux density presented to the sensor in a
particular application, are available.
For safe, reliable operation, the output should not be
pulled above the supply voltage or pulled below the device
ground.
For optimum performance, a 100 pF capacitor between
the output and ground should be added.
The nominal sensitivity is factory set to compensate for
the temperature coefficient of samarium-cobalt magnets
(-0.02%/°C).
The ratiometric feature is especially valuable when these
devices are used with an analog-to-digital converter. A/D
converters typically derive their LSB step size by ratioing off a
reference voltage line. If the reference voltage varies, the LSB
will vary proportionally. This is a major error source in many
sensing systems. The A3507/08– can eliminate this source of
error by their ratiometric operation. Because their gain and
offsets are proportional to the supply voltage, if they are
powered from the A/D reference voltage, the sensor output
voltage will track changes in the LSB value.
Hall-effect applications information is available in the
application note “Linear Hall-Effect Sensors” (AN 27702),
which can be found in the latest issue of Allegro Electronic
Data Book, AMS-702, or at
www.allegromicro.com
3507 AND 3508
RATIOMETRIC,
LINEAR HALL-EFFECT SENSORS
FOR HIGH-TEMP. OPERATION
SENSOR LOCATION
ACTIVE AREA DEPTH
0.018"
0.46 mm
NOM
A
BRANDED
SURFACE
1
0.082"
2.07 mm
0.055"
1.40 mm
23
Dwg. MH-011-6A
TYPICAL CURRENT-SENSING APPLICATION
B ≈ N x 6.9 G/A
Dwg. AH-005A
www.allegromicro.com
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet 3507.PDF ] | |
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