A1221EUA-T

更新时间： 2024-01-21 02:24:23

品牌	Logo	应用领域
急速微 - ALLEGRO		传感器换能器磁场传感器信息通信管理
页数	文件大小	规格书
13页	281K
描述
Chopper Stabilized Precision Hall Effect Latches

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技术参数
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A1221EUA-T 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	包装说明：	SIP3,.03,50
Reach Compliance Code：	compliant	风险等级：	0.67
Is Samacsys：	N	其他特性：	REVERSE BATTERY PROTECTION, SHORT-CIRCUIT PROTECTION
主体宽度：	1.52 mm	主体高度：	5.26 mm
主体长度或直径：	4.09 mm	滞后：	10 mT
JESD-609代码：	e3	最大磁场范围：	9 mT
最小磁场范围：	-9 mT	安装特点：	THROUGH HOLE MOUNT
端子数量：	3	最大工作电流：	4 mA
最高工作温度：	150 °C	最低工作温度：	-40 °C
输出电路类型：	SINGLE-ENDED	最大输出电流：	25 mA
输出范围：	30-60mA	输出类型：	ANALOG CURRENT
封装主体材料：	PLASTIC/EPOXY	封装等效代码：	SIP3,.03,50
封装形状/形式：	RECTANGULAR	电源：	3/24 V
传感器/换能器类型：	MAGNETIC FIELD SENSOR,HALL EFFECT	子类别：	Other Sensors/Transducers
最大供电电压：	24 V	最小供电电压：	3 V
表面贴装：	NO	技术：	BICMOS
端子面层：	Matte Tin (Sn)	端接类型：	SOLDER
Base Number Matches：	1

A1221EUA-T 数据手册

A1220, A1221

and A1222

Chopper Stabilized Precision Hall Effect Latches

Functional Description

Operation

Applications

The output of these devices switches low (turns on) when a mag-

netic field perpendicular to the Hall element exceeds the operate

point threshold, B_OP(see panel A of figure 1). After turn-on, the

output voltage is V_OUT(SAT). The output transistor is capable of

sinking current up to the short circuit current limit, I_OM, which is

a minimum of 30 mA. When the magnetic field is reduced below

the release point, B_RP, the device output goes 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.

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 figure 1, a 0.1 μF capacitor is typical.

Extensive applications information for Hall effect devices is

available in:

• Hall-Effect IC Applications Guide, Application Note 27701

• Guidelines for Designing Subassemblies Using Hall-Effect

Devices, Application Note 27703.1

Removal of the magnetic field will leave the device output

latched on if the last crossed switchpoint is B_OP, or latched off if

the last crossed switch point is B_RP.

• Soldering Methods for Allegro’s Products – SMT and Through-

Hole, Application Note 26009

Powering-on the device in the hysteresis range (less than B_OPand

higher than B_RP) will give an indeterminate output state. The cor-

All are provided in Allegro Electronic Data Book, AMS-702, and

rect state is attained after the first excursion beyond B_OPor B_RP

the Allegro Web site, www.allegromicro.com.

V_S

V+

V_CC

VCC

R_L

A122x

C_BYP

VOUT

0.1 μF

Output

GND

V_OUT(SAT)

B+

B–

B_HYS

(A)

(B)

Figure 1. Switching behavior of latches. In panel A, 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.

Allegro MicroSystems, Inc.

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

1...6 7 8910 11 12 13

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与A1221EUA-T相关器件

型号	品牌	描述	获取价格	数据表
A1221LLHLT-T	ALLEGRO	Chopper Stabilized Precision Hall Effect Latches	获取价格
A1221LLHLT-T2	ALLEGRO	Chopper Stabilized Precision Hall Effect Latches	获取价格
A1221LLHLX-T	ALLEGRO	Chopper Stabilized Precision Hall Effect Latches	获取价格
A1221LUA-T	ALLEGRO	Chopper Stabilized Precision Hall Effect Latches	获取价格
A1222	ALLEGRO	Chopper Stabilized Precision Hall Effect Latches	获取价格
A1-2226SCC	HRS	Wire Terminal	获取价格

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