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| 型号： | A1121ELHLT-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 12/18页 |
| 文件大小： | 407K |
| 描述： | SENSOR HALL EFFECT UNIPLR SOT23 |
| 标准包装： | 6,000 |
| 传感范围： | 135G 跳闸，40G 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 ~ 85°C |
| 封装/外壳： | SOT-23W |
| 供应商设备封装： | SOT-23W |
| 包装： | 带卷 (TR) |
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 |
|---|---|
| A1121ELHLT-T2 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Chopper Stabilized Precision Hall Effect Switches |
| A1121ELHLX-T | 功能描述:SENSOR HALL EFFECT UNIPLR SOT23 RoHS:是 类别:传感器，转换器 >> 磁性 - 霍尔效应，数字式开关，线性，罗盘 (IC) 系列:- 标准包装:1 系列:- 传感范围:20mT ~ 80mT 类型:旋转 电源电压:4.5 V ~ 5.5 V 电流 - 电源:15mA 电流 - 输出（最大）:- 输出类型:数字式，PWM，8.5 位串行 特点:可编程 工作温度:-40°C ~ 150°C 封装/外壳:20-SSOP（0.209"，5.30mm 宽） 供应商设备封装:20-SSOP 包装:Digi-Reel® 其它名称:AS5132-HSST-500DKR |
| A1121EUA-T | 功能描述:SENSOR HALL EFFECT UNIPLR 3SIP RoHS:是 类别:传感器，转换器 >> 磁性 - 霍尔效应，数字式开关，线性，罗盘 (IC) 系列:- 标准包装:1 系列:- 传感范围:20mT ~ 80mT 类型:旋转 电源电压:4.5 V ~ 5.5 V 电流 - 电源:15mA 电流 - 输出（最大）:- 输出类型:数字式，PWM，8.5 位串行 特点:可编程 工作温度:-40°C ~ 150°C 封装/外壳:20-SSOP（0.209"，5.30mm 宽） 供应商设备封装:20-SSOP 包装:Digi-Reel® 其它名称:AS5132-HSST-500DKR |
| A1121LLHLT-T | 功能描述:SENSOR HALL EFFECT UNIPLR SOT23 RoHS:是 类别:传感器，转换器 >> 磁性 - 霍尔效应，数字式开关，线性，罗盘 (IC) 系列:- 标准包装:1 系列:- 传感范围:20mT ~ 80mT 类型:旋转 电源电压:4.5 V ~ 5.5 V 电流 - 电源:15mA 电流 - 输出（最大）:- 输出类型:数字式，PWM，8.5 位串行 特点:可编程 工作温度:-40°C ~ 150°C 封装/外壳:20-SSOP（0.209"，5.30mm 宽） 供应商设备封装:20-SSOP 包装:Digi-Reel® 其它名称:AS5132-HSST-500DKR |
| A1121LLHLT-T2 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Chopper Stabilized Precision Hall Effect Switches |
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