參數(shù)資料
型號: A3197EU
廠商: Allegro MicroSystems, Inc.
英文描述: IC SENSOR QWHEEL ROTARY 14TSSOP
中文描述: 保護,高溫,集電極開路霍爾效應鎖存
文件頁數(shù): 5/12頁
文件大小: 193K
代理商: A3197EU
3197
PROTECTED, HIGH-TEMP.,
OPEN-COLLECTOR
HALL-EFFECT LATCH
www.allegromicro.com
26 V
MAX
0
+B
0
O
FLUX DENSITY
Dwg. GH-034-2A
-B
RP
B
V
OUT(SAT)
BB
V
OP
B
OPERATION
In operation, the output transistor is OFF
until the strength of the magnetic field
perpendicular to the surface of the chip
exceeds the threshold or operate point (B
OP
).
When the field strength exceeds B
OP
, the
output transistor switches ON
(a logic low) and is capable of sinking
35 mA of current.
The output transistor switches OFF (a
logic high) when magnetic field reversal
results in a magnetic flux density below the
OFF threshold (B
RP
). This is illustrated in
the transfer characteristics graph. Note that
the device latches; that is, a south pole of
sufficient strength will turn the device ON.
Removal of the south pole will leave the
device ON. The presence of a north pole of
sufficient strength is required to turn the
device OFF.
The switch points increase in sensitivity
with increasing temperature to compensate
for the typical ferrite magnet temperature
characteristic. The simplest form of magnet
that will operate these devices is a ring
magnet. Other methods of operation are
possible.
TEST CIRCUIT AND TYPICAL APPLICATION
TO
μ
P
3
X
Dwg. EH-006A
V
CC(UV)
TO 26 V
WITH TRANSIENTS
L
R
L
C
REGULATED
< 26 V
V
BB
V
CC
BYPASS
C
2
1
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參數(shù)描述
A3197LLT 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:HALL-EFFECT LATCHES FOR HIGH-TEMPERATURE OPERATION
A3197LU 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:HALL-EFFECT LATCHES FOR HIGH-TEMPERATURE OPERATION
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