A3245LUA

更新时间： 2024-09-22 22:47:19

品牌	Logo	应用领域
急速微 - ALLEGRO		开关
页数	文件大小	规格书
12页	392K
描述
Chopper-Stabilized Omnipolar Hall-Effect Switches

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A3245LUA 数据手册

A3245

Chopper-Stabilized

Omnipolar Hall-Effect Switches

The A3245 integrated circuit is an omnipolar, ultrasensitive Hall-effect switch

with a digital output. This sensor has an integrated regulator permitting operation

to 24 V, making it the ﬁrst omnipolar switch available for operation to 24 V. This

device is especially suited for operation over extended temperature ranges, up

to +150°C. Superior high-temperature performance is made possible through an

Allegro^®patented dynamic offset cancellation, which reduces the residual offset

voltage normally caused by device overmolding, temperature excursions, and

thermal stress.

Package LH, 3-pin Surface Mount

The A3245 Hall-effect switch includes the following on a single silicon chip:

voltage regulator, Hall-voltage generator, small-signal ampliﬁer, chopper stabiliza-

tion, Schmitt trigger, and a short circuit protected open-drain output. Advanced

BiCMOS wafer fabrication processing is used to take advantage of low-voltage

requirements, component matching, very low input-offset errors, and small com-

ponent geometries.

The omnipolar operation of the A3245 allows activation with either a north or

a south polarity ﬁeld of sufﬁcient strength. In the absence of a magnetic ﬁeld,

the output is off. This patented magnetic-polarity-independence feature makes

this device an excellent replacement for reed switches, with improved ease of

manufacturing, because the A3245 does not require manufacturers to orient their

magnets. These devices allow simple on/off switching in industrial, consumer, and

automotive applications.

Package UA, 3-pin SIP

The A3245 is rated for operation between the ambient temperatures –40°C and

85°C for the E temperature range, and –40°C to 150°C for the L temperature

range. The small geometries of the BiCMOS process allow these devices to be

provided in ultrasmall packages. The package styles available provide magneti-

cally optimized solutions for most applications. Package LH is an SOT23W, a

miniature low-proﬁle surface-mount package, while package UA is a three-lead

ultramini SIP for through-hole mounting. Each package is available in a lead (Pb)

free version, with 100% matte tin plated leadframes.

ABSOLUTE MAXIMUM RATINGS

Features and Beneﬁts

ꢀOmnipolar operation

ꢀOutput short circuit protection

ꢀSolid state reliability

ꢀSmall size

Supply Voltage, V_CC..........................................28 V

Reverse-Supply Voltage, V_RCC........................–18 V

Reverse-Supply Current, I_RCC........................–2 mA

Output Off Voltage, V_OUT..................................28 V

Output Current, I_OUTSINK........... Internally Limited

Magnetic Flux Density, B .........................Unlimited

Operating Temperature

Ambient, T_A, Range E..................–40ºC to 85ºC

Ambient, T_A, Range L................–40ºC to 150ºC

Maximum Junction, T_J(MAX)......................165ºC

Storage Temperature, T_S..................–65ºC to 170ºC

ꢀChopper stabilization

ꢀSuperior temperature stability

ꢀExtremely low switchpoint drift

ꢀInsensitive to physical stress

ꢀReverse battery protection

ꢀRobust EMC capability

ꢀHigh ESD ratings (HBM)

Allegro MicroSystems, Inc.

115 Northeast Cutoff, Box 15036

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

www.allegromicro.com

A3245-DS, Rev. 1

12 3 4 5 6 7...12

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与A3245LUA相关器件

型号	品牌	获取价格	描述	数据表
A3245LUA-T	ALLEGRO	获取价格	Chopper-Stabilized Omnipolar Hall-Effect Switches
A3-24DA-2SV	HRS	获取价格	Board Connector, 24 Contact(s), 2 Row(s), Female, Straight, 0.079 inch Pitch, Surface Moun
A3-24DA-2SV(71)	HRS	获取价格	Board Connector
A324ERW	MPD	获取价格	Low Cost, Wide Input, 3W Single & Dual Output DC/DC Converters
A3-24PA-2DS	HRS	获取价格	Board Connector, 24 Contact(s), 2 Row(s), Male, Right Angle, Solder Terminal
A3-24PA-2DSA	HRS	获取价格	Board Connector, 24 Contact(s), 2 Row(s), Male, Straight, Solder Terminal,
A3-24PA-2SV	HRS	获取价格	Board Connector, 24 Contact(s), 2 Row(s), Male, Straight, 0.079 inch Pitch, Surface Mount
A3-24PA-2SV(71)	HRS	获取价格	Board Connector, 24 Contact(s), 2 Row(s), Male, Straight, Surface Mount Terminal, ROHS COM
A324R	MPD	获取价格	Compact, Regulated, 3W Single & Dual Output DC/DC Converters
A324RW	MPD	获取价格	Wide Input Range, 3W Single & Dual Output DC/DC Converters

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