Datasheet > 传感器/换能器 > 磁场传感器> A1321ELHLT-T

A1321ELHLT-T

更新时间： 2024-01-28 07:33:17

品牌	Logo	应用领域
急速微 - ALLEGRO		传感器
页数	文件大小	规格书
11页	319K
描述
Ratiometric Linear Hall Effect Sensor for High-Temperature Operation

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技术参数
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A1321ELHLT-T 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
Reach Compliance Code：	compliant	风险等级：	5.89
主体宽度：	1.55 mm	主体高度：	3.03 mm
主体长度或直径：	4.1 mm	外壳：	PLASTIC
JESD-609代码：	e0	线性度 (%)：	1 %
最大磁场范围：	10 mT	安装特点：	THROUGH HOLE MOUNT
最大工作电流：	8 mA	最大输出电流：	-1.5 mA
输出范围：	0.20-4.70V	输出类型：	ANALOG VOLTAGE
封装形状/形式：	RECTANGULAR	电阻：	1.5 Ω
灵敏度（mV / G）：	5 mV/G	传感器/换能器类型：	MAGNETIC FIELD SENSOR,HALL EFFECT
表面贴装：	NO	端子面层：	Tin/Lead (Sn/Pb)
端接类型：	SOLDER	Base Number Matches：	1

A1321ELHLT-T 数据手册

A1321, A1322,

and A1323

Ratiometric Linear Hall Effect Sensor

for High-Temperature Operation

Power Derating

Example: Reliability for V_CCat T_A=150°C, package UA, 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=165°C/W, T_J(max)=165°C, V_CC(max)= 5.5 V, and

I_CC(max)= 8 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÷165 °C/W=91mW

Finally, invert equation 1 with respect to voltage:

V_CC(est)= P_D(max)÷ I_CC(max)= 91mW÷8mA=11.4 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)

ΔT = P_D

(2)

θJA

T_J= T_A+ ΔT

(3)

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

V_CC= 12 V, I_CC= 4 mA, and R_θJA= 140 °C/W, then:

P_D= V_CC

= 12 V 4 mA = 48 mW

ΔT = P_D

= 48 mW 140 °C/W = 7°C

θJA

T_J= T_A+ ΔT = 25°C + 7°C = 32°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

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

www.allegromicro.com

1...6 7 8910 11

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A1321ELHLT-T 替代型号

型号	品牌	替代类型	描述	数据表
A3515EUA	ALLEGRO	完全替代	RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMPERATURE OPERATION
A1321LUA	ALLEGRO	完全替代	Ratiometric Linear Hall Effect Sensor for High-Temperature Operation
A1321EUA	ALLEGRO	完全替代	Ratiometric Linear Hall Effect Sensor for High-Temperature Operation

与A1321ELHLT-T相关器件

型号	品牌	获取价格	描述	数据表
A1321ELHLT-T2	ALLEGRO	获取价格	Ratiometric Linear Hall Effect Sensor ICs for High-Temperature Operation
A1321EUA	ALLEGRO	获取价格	Ratiometric Linear Hall Effect Sensor for High-Temperature Operation
A1321EUA-T	ALLEGRO	获取价格	Ratiometric Linear Hall Effect Sensor for High-Temperature Operation
A1321EUA-T3	ALLEGRO	获取价格	Ratiometric Linear Hall Effect Sensor ICs for High-Temperature Operation
A1321EUA-TL	ALLEGRO	获取价格	Hall Effect Sensor, 10mT Max, 0.20-4.70V, Rectangular, Through Hole Mount, SIP-3
A1321L	ALLEGRO	获取价格	Hall Effect Sensor, 0.2-4.7V, Rectangular, Surface Mount, LH-3
A1321LLH	ALLEGRO	获取价格	Ratiometric Linear Hall Effect Sensor for High-Temperature Operation
A1321LLHLT	ALLEGRO	获取价格	暂无描述
A1321LLHLT-T	ALLEGRO	获取价格	Ratiometric Linear Hall Effect Sensor for High-Temperature Operation
A1321LLHLT-T2	ALLEGRO	获取价格	Ratiometric Linear Hall Effect Sensor ICs for High-Temperature Operation

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