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参数资料
| 型号： | A3245LLHLT |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 9/13页 |
| 文件大小： | 506K |
| 描述： | IC SW HALL EFFECT OMNI SOT23W |
| 标准包装： | 3,000 |
| 传感范围： | ±55G 跳闸，±6G 释放 |
| 类型： | 全极开关 |
| 电源电压： | 3.6 V ~ 24 V |
| 电流 - 电源： | 3.5mA |
| 输出类型： | 数字式，开漏极 |
| 特点： | 稳压电压 |
| 工作温度： | -40°C ~ 150°C |
| 封装/外壳： | SOT-23W |
| 供应商设备封装： | SOT-23W |
| 包装： | 带卷 (TR) |
Chopper-Stabilized Omnipolar Hall Effect Switches
A3245
8
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Functional Description
B
HYS
B
HYS
V
S
V
OUT(SAT)
B+
B
V+
0
0
VCC
V
S
Output
GND
VOUT
R
LOAD
A3245
0.1 礔
C
BYP
Operation
The output of this device switches low (turns on) when a mag-
netic eld perpendicular to the Hall element exceeds the oper-
ate point, B
OPS
(or is less than B
OPN
). After turn-on, the output
voltage is V
OUT(SAT)
. The output transistor is capable of sink-
ing current up to the short circuit current limit, I
OM
, which is a
minimum of 30 mA. When the magnetic eld is reduced below
the release point, B
RPS
(or increased above B
RPN
), the device
output switches 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 switching of the output even
in the presence of external mechanical vibration and electrical
noise.
Powering-on the device in a hysteresis region, between B
OPX
and B
RPX
, allows an indeterminate output state. The correct state
is attained after the rst excursion beyond B
OPX
or B
RPX
.
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 both external noise
and noise generated by the chopper stabilization technique. As is
shown in Panel B of gure 1, a 0.1糉 capacitor is typical.
Omnipolar switches allow operation with either a north pole or
south pole magnet orientation, enhancing product manufactur-
ability with the device.
Extensive applications information on magnets and Hall-effect
devices is available in:
" Hall-Effect IC Applications Guide, AN27701,
" Hall-Effect Devices: Gluing, Potting, Encapsulating, Lead
Welding and Lead Forming, AN27703.1
" Soldering Methods for Allegros Products SMT and Through-
Hole, AN26009
All are provided in Allegro Electronic Data Book, AMS-702 and
the Allegro Web site: www.allegromicro.com
Figure 1: Switching Behavior of Omnipolar Switches. In Panel A, on the horizontal axis, the B+ direction indicates increasing south polarity
magnetic eld strength, and the B direction indicates decreasing south polarity eld strength (including the case of increasing north
polarity). This behavior can be exhibited when using a circuit such as that shown in panel B.
(A)
(B)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| A3245LLHLT-T | 功能描述:IC SW HALL EFFECT OMNI SOT23W 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 |
| A3245LUA | 功能描述:IC SW HALL EFFECT OMNI 3-SIP RoHS:否 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 |
| A3245LUA-T | 功能描述:IC SW HALL EFFECT OMNI 3-SIP 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 |
| A3245LUA-T | 制造商:Allegro MicroSystems 功能描述:Hall Effect Switch IC |
| A32464-000 | 制造商:TE Connectivity 功能描述:VARISTOR 300V 20MM STRAIGHT LEAD 制造商:TE Connectivity 功能描述:VARISTOR 300V 12.5KA DISC 20MM |
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