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| 型号： | A1202ELHLT-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 8/14页 |
| 文件大小： | 356K |
| 描述： | IC SW CONTINUE TIME BIPO SOT23W |
| 产品培训模块： | Current Sensor |
| 标准包装： | 3,000 |
| 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 ~ 85°C |
| 封装/外壳： | SOT-23W |
| 供应商设备封装： | SOT-23W |
| 包装： | 带卷 (TR) |
Continuous-Time Bipolar Switch Family
A1202
and A1203
8
Allegro MicroSystems, LLC
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Functional Description
Bipolar Device Switching
The devices of the A120X family provide highly sensitive
switching for applications using magnetic fields of alternating
polarities, such as ring magnets. There are three switching modes
for bipolar devices, referred to as latch, unipolar switch, and
negative switch. Mode is determined by the switchpoint charac-
teristics of the individual device. The characteristic hysteresis,
B
HYS
, of the device, is the difference in the relative magnetic
strength and polarity of the switchpoints of the device. (Note
that, in the following descriptions, a negative magnetic value
indicates a north polarity field, and a positive magnetic value
indicates a south polarity field. For a given value of magnetic
strength, B
X
, the values B
X
and B
X
indicate two fields of equal
strength, but opposite polarity. B = 0 indicates the absence of a
magnetic field.)
Bipolar devices typically behave as latches. In this mode,
magnetic fields of opposite polarity and equivalent strengths
are needed to switch the output. When the magnetic fields are
removed (B ?0) the device remains in the same state until a
magnetic field of the opposite polarity and of sufficient strength
causes it to switch. The hysteresis of latch mode behavior is
shown in panel A of figure 1.
In contrast to latching, when a device exhibits unipolar switch-
ing, it only responds to a south magnetic field. The field must
be of sufficient strength, > B
OP
, for the device to operate. When
the field is reduced beyond the B
RP
level, the device switches
back to the high state, as shown in panel B of figure 1. Devices
exhibiting negative switch behavior operate in a similar but
opposite manner. A north polarity field of sufficient strength,
> B
RP
, (more north than B
RP
) is required for operation, although
the result is that V
OUT
switches high, as shown in panel C. When
Figure 1. Bipolar Device Output Switching Modes. These behaviors can be exhibited when using a circuit such as that shown in panel D. Panel A
displays the hysteresis when a device exhibits latch mode (note that the B
HYS
band incorporates B= 0), panel B shows unipolar switch behavior (the
B
HYS
band is more positive than B = 0), and panel C shows negative switch behavior (the B
HYS
band is more negative than B = 0). Bipolar devices,
such as the 120x family, can operate in any of the three modes.
B
HYS
V
OUT(SAT)
V+
0
B
HYS
V
OUT(SAT)
V+
0
B
HYS
V
OUT(SAT)
V+
0
V
CC
V
CC
V
CC
B+
B
B+
B 0
0
B+
B
0
(A)
(B)
(C)
VCC
V
S
Output
GND
VOUT
R
L
A120x
(D)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| A1202EUA-T | 功能描述:IC SW CONTINUE 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 |
| A1202HS 10 | 制造商:Thomas & Betts 功能描述:1/2 SLOT CHANNEL |
| A1202HS 10EG | 制造商:Thomas & Betts 功能描述:COMBO CHANNEL ELECTRO-GALV. |
| A1202HS 14 | 制造商:Thomas & Betts 功能描述:1/2 SLOT CHANNEL |
| A1202HS 20CR | 制造商:Thomas & Betts 功能描述:A1202HS 20 CLEAN ROOM GOLD |
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