Datasheet > A1141LLHLT

A1141LLHLT

更新时间： 2024-01-09 07:09:38

品牌	Logo	应用领域
急速微 - ALLEGRO		信息通信管理光电二极管
页数	文件大小	规格书
13页	344K
描述
Analog Circuit, 1 Func, BICMOS, PDSO3, MINIATURE, SOT-23W, 3 PIN

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A1141LLHLT 数据手册

Sensitive Two-Wire Chopper-Stabilized

Unipolar Hall Effect Switches

A1140, A1141,

A1142, and A1143

Application Information

Typical Application Circuit

The A114x family of devices must be protected by an external

bypass capacitor, C_BYP, connected between the supply, VCC,

and the ground, GND, of the device. C_BYPreduces both external

noise and the noise generated by the chopper-stabilization func-

tion. As shown in figure 3, a 0.01 μF capacitor is typical.

V+

VCC

A114x

BYP

Installation of C_BYPmust ensure that the traces that connect it to

the A114x pins are no greater than 5 mm in length.

0.01 μF

GND

All high-frequency interferences conducted along the supply

lines are passed directly to the load through C_BYP, and it serves

only to protect the A114x internal circuitry. As a result, the load

ECU (electronic control unit) must have sufficient protection,

other than C_BYP, installed in parallel with the A114x.

Package UA Only

Maximum separation 5 mm

R_SENSE

A series resistor on the supply side, RS (not shown), in combina-

tion with C_BYP, creates a filter for EMI pulses.

When determining the minimum V_CCrequirement of the A114x

device, the voltage drops across R_Sand the ECU sense resistor,

R_SENSE, must be taken into consideration. The typical value for

R_SENSEis approximately 100 Ω.

ECU

Figure 3. Typical application circuit

For additional general application information, visit the Allegro

Web site at www. allegromicro.com.

Allegro MicroSystems, Inc.

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

www.allegromicro.com

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