Datasheet > A1242EUA-I2-T

A1242EUA-I2-T

更新时间： 2024-02-09 01:36:09

品牌	Logo	应用领域
急速微 - ALLEGRO		/
页数	文件大小	规格书
11页	364K
描述
Two-Wire Chopper-Stabilized Hall Effect Latch

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A1242EUA-I2-T 技术参数

是否Rohs认证：	符合	生命周期：	Obsolete
包装说明：	LEAD FREE, ULTRA MINI, SIP-3	Reach Compliance Code：	unknown
风险等级：	5.83	其他特性：	BICMOS COMPATIBLE, REVERSE BATTERY PROTECTION
主体宽度：	1.52 mm	主体高度：	5.2 mm
主体长度或直径：	4.105 mm	滞后：	6.4 mT
输入模式：	UNIPOLAR	JESD-609代码：	e3
最大磁场范围：	8 mT	最小磁场范围：	-8 mT
安装特点：	THROUGH HOLE MOUNT	端子数量：	3
最大工作电流：	5 mA	最高工作温度：	85 °C
最低工作温度：	-40 °C	输出接口类型：	2-WIRE INTERFACE
输出类型：	ANALOG CURRENT	封装主体材料：	PLASTIC/EPOXY
封装等效代码：	SIP3,.03	封装形状/形式：	RECTANGULAR
电源：	3.5/24 V	传感器/换能器类型：	MAGNETIC FIELD SENSOR,HALL EFFECT
子类别：	Other Sensors	最大供电电压：	24 V
最小供电电压：	3.5 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

A1242EUA-I2-T 数据手册

A1242

Two-Wire Chopper-Stabilized Hall Effect Latch

Power Derating

Example: Reliability for V_CCat T_A=150°C, package LH, using

minimum-K PCB.

The device must be operated below the maximum junction

temperature of the device, T_J(max). Under certain combinations of

peak conditions, reliable operation may require derating sup-

plied power or improving the heat dissipation properties of the

application. This section presents a procedure for correlating

factors affecting operating T_J. (Thermal data is also available on

the Allegro MicroSystems Web site.)

Observe the worst-case ratings for the device, specifically:

R_θJA=228°C/W, T_J(max)=165°C, V_CC(max)= 24 V, and

I_CC(max)= 17 mA.

Calculate the maximum allowable power level, P_D(max). First,

invert equation 3:

The Package Thermal Resistance, R_θJA, is a figure of merit sum-

marizing the ability of the application and the device to dissipate

heat from the junction (die), through all paths to the ambient air.

Its primary component is the Effective Thermal Conductivity,

K, of the printed circuit board, including adjacent devices and

traces. Radiation from the die through the device case, R_θJC, is

relatively small component of R_θJA. Ambient air temperature,

T_A, and air motion are significant external factors, damped by

overmolding.

ΔT_max= T_J(max)– T_A= 165°C–150°C = 15°C

This provides the allowable increase to T_Jresulting from internal

power dissipation. Then, invert equation 2:

P_D(max)= ΔT_max÷R_θJA=15°C÷228 °C/W=66mW

Finally, invert equation 1 with respect to voltage:

V_CC(est)= P_D(max)÷ I_CC(max)= 66mW÷17mA=3.9 V

The effect of varying power levels (Power Dissipation, P_D), can

be estimated. The following formulas represent the fundamental

relationships used to estimate T_J, at P_D.

The result indicates that, at T_A, the application and device can

dissipate adequate amounts of heat at voltages ≤V_CC(est)

Compare V_CC(est)to V_CC(max). If V_CC(est)≤ V_CC(max), then reli-

able operation between V_CC(est)and V_CC(max)requires enhanced

R_θJA. If V_CC(est)≥ V_CC(max), then operation between V_CC(est)and

V_CC(max)is reliable under these conditions.

P_D= V_IN

(1)

(2)

(3)

ΔT = P_D

θJA

T_J= T_A+ ΔT

For example, given common conditions such as: T_A= 25°C,

V_CC= 12 V, I_CC= 6 mA, and R_θJA= 165 °C/W, then:

P_D= V_CC

= 12 V 6 mA = 72 mW

ΔT = P_D

= 72 mW 165 °C/W = 12°C

θJA

T_J= T_A+ ΔT = 25°C + 12°C = 37°C

A worst-case estimate, P_D(max), represents the maximum allow-

able power level (V_CC(max), I_CC(max)), without exceeding T_J(max)

at a selected R_θJAand T_A.

Allegro MicroSystems, Inc.

115 Northeast Cutoff, Box 15036

A1242-DS

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

www.allegromicro.com

1...6 7 8910 11

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与A1242EUA-I2-T相关器件

型号	品牌	获取价格	描述	数据表
A1242LLHLT-I1-T	ALLEGRO	获取价格	Two-Wire Chopper-Stabilized Hall Effect Latch
A1242LLHLT-I2-T	ALLEGRO	获取价格	Two-Wire Chopper-Stabilized Hall Effect Latch
A1242LUA-I1-T	ALLEGRO	获取价格	Two-Wire Chopper-Stabilized Hall Effect Latch
A1242LUA-I2-T	ALLEGRO	获取价格	Two-Wire Chopper-Stabilized Hall Effect Latch
A1244	ALLEGRO	获取价格	Chopper-Stabilized, Two Wire Hall-Effect Latch
A12442MNCB	ITT	获取价格	Rotary Switch, 4 Positions, SP4T, Latched, 0.02A, 20VDC, Solder Terminal, High-metric Actu
A12442MNCBE	ITT	获取价格	Rotary Switch, 4 Positions, SP4T, Latched, 0.02A, 20VDC, Solder Terminal, High-metric Actu
A12442MNCBF	ITT	获取价格	Rotary Switch, 4 Positions, SP4T, Latched, 0.02A, 20VDC, Solder Terminal, High-metric Actu
A12442MNCBK	ITT	获取价格	Rotary Switch, 4 Positions, SP4T, Latched, 0.02A, 20VDC, Solder Terminal, High-metric Actu
A12442MNCG	ITT	获取价格	Rotary Switch, 4 Positions, SP4T, Latched, 0.35A, 125VDC, Solder Terminal, High-metric Act

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