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参数资料
| 型号： | A1104LUA-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 7/13页 |
| 文件大小： | 748K |
| 描述： | IC SWITCH HALL EFFECT 3-SIP |
| 产品培训模块： | Current Sensor |
| 标准包装： | 4,000 |
| 传感范围： | 450G 跳闸，25G 释放 |
| 类型： | 单极开关 |
| 电源电压： | 3.8 V ~ 24 V |
| 电流 - 电源： | 7.5mA |
| 电流 - 输出（最大）： | 25mA |
| 输出类型： | 数字，开路集电极 |
| 特点： | 稳压电压 |
| 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 |
Continuous-Time Switch Family
A1101, A1102, A1103,
A1104, and A1106
7
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Functional Description
OPERATION
The output of these devices switches low (turns on) when a
magnetic field (south polarity) perpendicular to the Hall ele-
ment 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 magnetic field is reduced below the release
point, B
RP
, the device output goes high (turns off). The differ-
ence 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 mechanical
vibration and electrical noise.
Powering-on the device in the hysteresis region, less than B
OP
and
higher than B
RP
, allows an indeterminate output state. The correct
state is attained after the first excursion beyond B
OP
or B
RP
.
CONTINUOUS-TIME BENEFITS
Continuous-time devices, such as the A110x family, offer the
fastest available power-on settling time and frequency response.
Due to offsets generated during the IC packaging process,
continuous-time devices typically require programming after
packaging to tighten magnetic parameter distributions. In con-
trast, chopper-stabilized switches employ an offset cancellation
technique on the chip that eliminates these offsets without the
need for after-packaging programming. The tradeoff is a longer
settling time and reduced frequency response as a result of the
chopper-stabilization offset cancellation algorithm.
The choice between continuous-time and chopper-stabilized
designs is solely determined by the application. Battery manage-
ment is an example where continuous-time is often required. In
these applications, V
CC
is chopped with a very small duty cycle
in order to conserve power (refer to figure 2). The duty cycle
is controlled by the power-on time, t
PO
, of the device. Because
continuous-time devices have the shorter power-on time, they
are the clear choice for such applications.
For more information on the chopper stabilization technique,
refer to Technical Paper STP 97-10, Monolithic Magnetic Hall
Sensing Using Dynamic Quadrature Offset Cancellation and
Technical Paper STP 99-1, Chopper-Stabilized Amplifiers with a
Track-and-Hold Signal Demodulator.
Figure 1. Switching Behavior of Unipolar Switches. On the horizontal axis, the B+ direction indicates increasing south polarity magnetic field
strength, and the B direction indicates decreasing south polarity field strength (including the case of increasing north polarity). This behavior can
be exhibited when using a circuit such as that shown in Panel B.
B
HYS
V
CC
V
OUT(SAT)
B+
B
V+
0
0
(A)
(B)
VCC
V
S
Output
GND
VOUT
R
L
A110x
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| A1106LLHLT-T | IC SWITCH HALL EFFECT SOT-23W |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| A1104LUA-T | 制造商:Allegro MicroSystems 功能描述:Hall Effect Switch IC |
| A110-4MM | 制造商:DORMER TOOLS 功能描述:LONG SERIES DRILL 4.00MM |
| A1104RW | 制造商:MPD 制造商全称:MicroPower Direct, LLC 功能描述:Miniature, 10W DIP Single & Dual Output DC/DC Converters |
| A1105.0 | 制造商:DORMER 功能描述:DRILL LS HSS 5MM 制造商:DORMER 功能描述:DRILL, LS, HSS, 5MM |
| A1105.0- | 制造商:ROEBUCK 功能描述:RBK HSS L/S DRILL 5.00MM |
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