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| 型号： | A1202LLHLT-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 9/14页 |
| 文件大小： | 356K |
| 描述： | IC SW CONTINUOUS TIME BIPO SOT23 |
| 标准包装： | 1 |
| 传感范围： | 75G 跳闸，-75G 释放 |
| 类型： | 双极卡锁 |
| 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： | 标准包装 |
| 其它名称： | 620-1009-6 |
Continuous-Time Bipolar Switch Family
A1202
and A1203
9
Allegro MicroSystems, LLC
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
the field is reduced beyond the B
OP
level, the device switches
back to the low state.
The typical output behavior of the A120x devices is latching.
That is, switching to the low state when the magnetic field at the
Hall element exceeds the operate point threshold, B
OP
. At this
point, the output voltage is V
OUT(SAT)
. When the magnetic field
is reduced to below the release point threshold, B
RP
, the device
output, V
OUT
, goes high. The values of the magnetic parameters
are specified in the Magnetic Characteristics table, on page 3.
Note that, as shown in figure 1, these switchpoints can lie in
either north or south polarity ranges.
The A120x family is designed to attain a small hysteresis, and
thereby provide more sensitive switching. Although this means
that true latching behavior cannot be guaranteed in all cases,
proper switching can be ensured by use of both south and north
magnetic fields, as in a ring magnet. The hysteresis of the A120x
family allows clean switching of the output, even in the presence
of external mechanical vibration and electrical noise.
Bipolar devices adopt an indeterminate output state when pow-
ered-on in the absence of a magnetic field or in a field that lies
within the hysteresis band of the device.
For more information on Bipolar switches, refer to Application
Note 27705, Understanding Bipolar Hall Effect Sensor ICs.
CONTINUOUS-TIME BENEFITS
Continuous-time devices, such as the A120x 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.
Figure 2. Continuous-Time Application, B < B
RP
.. This figure illustrates the use of a quick cycle for chopping V
CC
in order to conserve battery power.
Position 1, power is applied to the device. Position 2, the output assumes the correct state at a time prior to the maximum Power-On Time, t
PO(max)
.
The case shown is where the correct output state is HIGH
. Position 3, t
PO(max)
has elapsed. The device output is valid. Position 4, after the output is
valid, a control unit reads the output. Position 5, power is removed from the device.
V
CC
V
OUT
Output Sampled
1
5
4
2
t
t
t
PO(max)
3
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相关代理商/技术参数 |
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|---|---|
| A1202LUA-T | 功能描述:IC SW CONTINUOUS TIME BIPO 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 |
| A1202P2 10 | 制造商:Thomas & Betts 功能描述:SS A1202P210 COMBO CHANNEL SIDE HOL |
| A1202W 20 | 制造商:Thomas & Betts 功能描述:A1200 BACK-TO-BACK WELDED |
| A1202W 20PG | 制造商:Thomas & Betts 功能描述:BACK-TO-BACK WELDED PRE-GALV STRUT |
| A1202W 27PG | 制造商:Thomas & Betts 功能描述:COMBINATION CHANNEL |
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