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參數(shù)資料
| 型號(hào)： | ATS535JSB |
| 元件分類： | 速度傳感器和接近開關(guān) |
| 英文描述： | PROXIMITY SENSOR-HALL EFFECT, 65-95mA, ROUND, THROUGH HOLE MOUNT |
| 文件頁(yè)數(shù)： | 8/12頁(yè) |
| 文件大?。?/td> | 90K |
| 代理商： | ATS535JSB |
ATS535JSB AND ATS535SSB
PROGRAMMABLE, TRUE
POWER-ON, HALL-EFFECT
PROXIMITY SENSORS
5
www.allegromicro.com
FUNCTIONAL DESCRIPTION
Dwg. EH-012
REG
SAMPLE
&
HOLD
X
+V
HALL
VOLTAGE
B
+
—
Dwg. AH-011-2
+B
0
OUTPUT
VOLTAGE
FLUX DENSITY
Dwg. GH-007-2
0
RP
B
VOUT(SAT)
CC
V
OP
B
+V
Chopper-Stabilized Technique. These devices use a
proprietary dynamic offset cancellation technique, with an
internal high-frequency clock to reduce the residual offset
voltage of the Hall element that is normally caused by
device overmolding, temperature dependencies, and
thermal stress. This technique produces devices that have
an extremely stable quiescent Hall output voltage, are
immune to thermal stress, and have precise recoverability
after temperature cycling. This technique will also slightly
degrade the device output repeatability.
The Hall element can be considered as a resistor array
similar to a Wheatstone bridge. A large portion of the
offset is a result of the mismatching of these resistors. The
chopper-stabilizing technique cancels the mismatching of
the resistors by changing the direction of the current
flowing through the Hall plate and Hall voltage measure-
ment taps, while maintaining the Hall-voltage signal that is
induced by the external magnetic flux. The signal is, then,
captured by a sample-and-hold circuit.
Operation. The output of these devices switches low
(turns ON) when a magnetic field (south pole) perpendicu-
lar to the Hall sensor exceeds the operate point threshold
(B
OP). After turn-ON, the output is capable of sinking 25
mA and the output voltage is V
OUT(SAT). When the mag-
netic field is reduced below the release point (B
RP), the
device output goes high (turns OFF). The difference in the
magnetic operate and release points is the hysteresis (B
hys)
of the device. This built-in hysteresis allows clean switch-
ing of the output even in the presence of external mechani-
cal vibration and electrical noise.
Applications. It is strongly recommended that an
external bypass capacitor be connected (in close proximity
to the Hall sensor) between the supply and ground of the
device to reduce both external noise and noise generated
by the chopper-stabilization technique.
Many other methods of operation are possible. Exten-
sive applications information on magnets and Hall-effect
sensors is also available in the Allegro Electronic Data
Book AMS-702 or Application Note 27701, or
www.allegromicro.com
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ATS611LSB | PROXIMITY SENSOR-HALL EFFECT, 0.5-2.5mm, 0.40V, ROUND, THROUGH HOLE MOUNT |
| ATS660LSB | PROXIMITY SENSOR-HALL EFFECT, 0.5-2.5mm, 0.40V, ROUND, THROUGH HOLE MOUNT |
| ATS622LSB | PROXIMITY SENSOR-HALL EFFECT, 0.5-2.5mm, 0.50%, 0.40V, ROUND, THROUGH HOLE MOUNT |
| ATS610LSA | PROXIMITY SENSOR-HALL EFFECT, 0.5-2.5mm, 0.40V, ROUND, THROUGH HOLE MOUNT |
| ATS612LSB | PROXIMITY SENSOR-HALL EFFECT, 0.4-2.5mm, 0.40V, ROUND, THROUGH HOLE MOUNT |
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