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参数资料
| 型号： | A3250ELTTR |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 2/16页 |
| 文件大小： | 300K |
| 描述： | IC SW HALL EFFECT UNI SOT-89 |
| 标准包装： | 1,000 |
| 传感范围： | 50G |
| 类型： | 单极开关 |
| 电源电压： | 4.2 V ~ 24 V |
| 电流 - 电源： | 10mA |
| 电流 - 输出（最大）： | 20mA |
| 输出类型： | 数字，开路集电极 |
| 特点： | 稳压电压 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | TO-243AA |
| 供应商设备封装： | SOT-89-3 |
| 包装： | 带卷 (TR) |
Description
The A3250 and A3251 are field-programmable, chopper-
stabilized, unipolar Hall-effect switches designed for use in
high-temperature applications. These devices use a chop-
per-stabilization technique to eliminate offset inherent in
single-element devices.
The A3250 and A3251 are externally programmable
devices. The devices have a wide range of programmabil-
ity of the magnetic operate point (B
OP
) while the hysteresis
remains fixed. This advanced feature allows for optimiza-
tion of the device switchpoint and can drastically reduce
the effects of variations found in a production environment,
such as magnet and device placement tolerances.
These devices provide on-chip transient protection. A Zener
clamp on the power supply protects against overvoltage
conditions on the supply line. These devices also include
short-circuit protection on the output.
The output of the A3250 switches LOW when subjected
to a south-polarity magnetic field with a flux density that
exceeds the threshold for B
OP
, and switches HIGH when the
field drops below the magnetic release point, B
RP
. The out-
put of the A3251 has the opposite polarity, switching HIGH
in a south-polarity magnetic field that B
OP
, and switching
LOW when the field drops below B
RP
.
3250-DS Rev. 11
Features and Benefits
?Chopper stabilization for stable switchpoints throughout
operating temperature range
?Externally programmable operate point (through VCC pin)
?On-board voltage regulator for 4.2 V to 24 V operation
?On-chip protection against:
?Supply transients
?Output short-circuits
?Reverse-battery condition
Field-Programmable, Chopper-Stabilized
Unipolar Hall-Effect Switches
Continued on the next page&
Package: 3-pin SOT89 (suffix LT) and
3-pin SIP (suffix UA)
Functional Block Diagram
Not to scale
A3250 and A3251
Current Limit
Amp
Regulator
Program/Lock
Low-Pass
Filter
VCC
GND
Programming
Logic
Offset Adjust
VOUT
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相关代理商/技术参数 |
参数描述 |
|---|---|
| A3250ELTTR-T | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Field-Programmable, Chopper-Stabilized Unipolar Hall-Effect Switches |
| A3250EUA | 功能描述:IC SW HALL EFFECT UNI 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 |
| A3250EUA-T | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Field-Programmable, Chopper-Stabilized Unipolar Hall-Effect Switches |
| A3250JUA | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Field-Programmable, Chopper-Stabilized Unipolar Hall-Effect Switches |
| A3250JUATL | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Field-Programmable, Chopper-Stabilized Unipolar Hall-Effect Switches |
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