A3425EK-T

更新时间： 2024-02-23 10:59:31

品牌	Logo	应用领域
急速微 - ALLEGRO		模拟IC 开关信号电路信息通信管理
页数	文件大小	规格书
21页	574K
描述
Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch

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A3425EK-T 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Obsolete	零件包装代码：	SOIC
包装说明：	SOIC-8	针数：	8
Reach Compliance Code：	unknown	HTS代码：	8542.39.00.01
风险等级：	5.8	模拟集成电路 - 其他类型：	ANALOG CIRCUIT
JESD-30 代码：	R-PDSO-G8	JESD-609代码：	e3
长度：	4.9 mm	功能数量：	1
端子数量：	8	最高工作温度：	150 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	SOP	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	峰值回流温度（摄氏度）：	260
认证状态：	Not Qualified	座面最大高度：	1.75 mm
最大供电电压 (Vsup)：	18 V	最小供电电压 (Vsup)：	3.3 V
标称供电电压 (Vsup)：	12 V	表面贴装：	YES
技术：	BICMOS	温度等级：	AUTOMOTIVE
端子面层：	Matte Tin (Sn)	端子形式：	GULL WING
端子节距：	1.27 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	40	宽度：	3.9 mm
Base Number Matches：	1

A3425EK-T 数据手册

A3425

Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch

The A3425 is a dual-output channel, bipolar switch with two separate Hall-effect

sensor circuits, each providing a separate digital output for speed and direction

signal processing capability. Each sensor circuit has its own independent Hall

element, which are photolithographically aligned to better than 1 µm. Maintaining

accurate mechanical location between the two active Hall elements eliminates the

major manufacturing hurdle encountered in ﬁne-pitch detection applications. The

Package L, 8-pin SOIC

A3425 is a highly sensitive, temperature-stable magnetic sensing device, which

is ideal for use in ring magnet-based speed and direction systems used in harsh

automotive and industrial environments.

VCC

OUTPUTA

OUTPUTB

GND

No connection

The A3425 monolithic integrated circuit contains two independent Hall effect

switches, located approximately 1 mm apart. The digital outputs are 90º out of

phase so that the outputs are in quadrature with the proper ring magnet design.

This allows for easy processing of speed and direction signals. Extremely low-

drift ampliﬁers guarantee symmetry between the switches to maintain signal

quadrature. The patented chopper stabilization technique cancels offsets in

each channel, and provides stable operation over the operating temperature and

voltage ranges. An on-chip regulator allows the use of this device over a wide

operating voltage range. Post-assembly factory programming provides sensitive

switchpoints that are symmetrical between the two switches.

Package K, 4-pin SIP

1. VCC

2. OUTPUTA

3. OUTPUTB

4. GND

The A3425 is available in a plastic 8-pin SOIC surface mount package and a plas-

tic 4-pin SIP, both in two temperature ranges. Each package is available in a lead

(Pb) free version with 100% matte tin plated leadframe.

ABSOLUTE MAXIMUM RATINGS

Features and Beneﬁts

Supply Voltage, V_CC.......................................26.5 V

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

Output Off Voltage, V_OUTPUT..............................V_CC

OutputSinkCurrent,I_OUTPUT(SINK). InternallyLimited

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

Operating Temperature

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

Range L................–40ºC to 150ºC

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

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

•

Two matched Hall effect switches on a single substrate

Sensor element spacing approximately 1 mm

Superior temperature stability

3.3 V to 18 V operation

Integrated ESD diode from OUTPUT and VCC pins to GND

High-sensitivity switchpoints

Robust structure for EMC protection

Solid-state reliability

Allegro MicroSystems, Inc.

115 Northeast Cutoff, Box 15036

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

www.allegromicro.com

A3425DS-Rev. !

12 3 4 5 6 7...21

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