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参数资料
| 型号： | A1120LUA-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 12/18页 |
| 文件大小： | 407K |
| 描述： | IC SW HALL EFFECT CHOPPER 3-SIP |
| 产品培训模块： | Current Sensor |
| 标准包装： | 4,000 |
| 传感范围： | 50G 跳闸，5G 释放 |
| 类型： | 单极开关 |
| 电源电压： | 3 V ~ 24 V |
| 电流 - 电源： | 4mA |
| 电流 - 输出（最大）： | 25mA |
| 输出类型： | 数字式，开漏极 |
| 特点： | 高温 |
| 工作温度： | -40°C ~ 150°C |
| 封装/外壳： | 3-SIP |
| 供应商设备封装： | 3-SIP |
| 包装： | 散装 |
| 产品目录页面： | 1139 (CN2011-ZH PDF) |
| 其它名称： | 620-1330 |
Chopper Stabilized Precision Hall Effect Switches
A1120, A1121, A1122,
A1123, and A1125
12
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
C
BYP
A112x
VOUT
GND
0.1 糉
VCC
Output
R
L
V
S
Operation
The output of the A1120, A1121, A1122, and A1123 devices
switches low (turns on) when a magnetic field perpendicular to
the Hall element exceeds the operate point threshold, B
OP
(see
panel A of figure 1). When the magnetic field is reduced below
the release point, B
RP
, the device output goes high (turns off).
The output of the A1125 devices switches high (turns off) when
a magnetic field perpendicular to the Hall element exceeds the
operate point threshold, B
OP
(see panel B of figure 1). When the
magnetic field is reduced below the release point, B
RP
, the device
output goes low (turns on).
After turn-on, the output voltage is V
OUT(SAT)
. The output tran-
sistor is capable of sinking current up to the short circuit current
limit, I
OM
, which is a minimum of 30 mA.
The difference in the magnetic operate and release points is the
hysteresis, B
HYS ,
of the device. This built-in hysteresis allows
clean switching of the output even in the presence of external
mechanical vibration and electrical noise. Powering-on the device
in the hysteresis range (less than B
OP
and higher than B
RP
) will
give an indeterminate output state. The correct state is attained
after the first excursion beyond B
OP
or B
RP
.
Applications
It is strongly recommended that an external bypass capacitor be
connected (in close proximity to the Hall element) between the
supply and ground of the device to reduce external noise in the
application. As is shown in panel B of figure 1, a 0.1 糉 capacitor
is typical.
Extensive applications information for Hall effect devices is
available in:
" Hall-Effect IC Applications Guide, Application Note 27701
" Guidelines for Designing Subassemblies Using Hall-Effect
Devices, Application Note 27703.1
" Soldering Methods for Allegros Products SMT and Through-
Hole, Application Note 26009
All are provided on the Allegro Web site, www.allegromicro.com.
Figure 1. Device switching behavior. In panels A and B, on the horizontal axis, the B+ direction indicates increasing south polarity magnetic field strength.
This behavior can be exhibited when using an electrical circuit such as that shown in panel C.
(A)
(B)
(C)
Functional Description
B
HYS
V
CC
V
OUT(SAT)
B+
V+
0
0
B
HYS
V
CC
V
OUT(SAT)
B+
V+
0
0
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相关代理商/技术参数 |
参数描述 |
|---|---|
| A1120LUA-T | 制造商:Allegro MicroSystems 功能描述:Hall Effect Switch IC |
| A1121 | 制造商:Quick 功能描述:Single 6.4mm Nozzle for 21-13205 and 21-13210 制造商:QUICK 功能描述:SINGLE NOZZLE NOZZLE FOR QUICK957/957D |
| A11214MNZQ | 制造商:ITT 制造商全称:ITT Industries 功能描述:1-4 Pole Rotary Switches |
| A11214MSZQ | 制造商:ITT 制造商全称:ITT Industries 功能描述:1-4 Pole Rotary Switches |
| A11214RNCBK | 功能描述:旋钮开关 Rotary RoHS:否 制造商:C&K Components 位置数量:5 卡片组数量: 每卡片组极数:2 电流额定值:250 mA 电压额定值:125 V 指数角: 触点类型: 触点形式:DPST 端接类型:Solder 安装类型:Panel 触点电镀:Silver |
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