The JTM90248 Omnipolar Hall effect sensor IC is fabricated

1.产品概述         2.产品特点
3.应用范围       4.下载产品资料PDF文档
5.产品封装图                     6.电路原理图
7.功能概述       8.相关产品

一,产品概述(General Description)

The JTM90248 Omnipolar Hall effect sensor IC is fabricated from mixed signal CMOS technology .It incorporates advan ced chopper-stabilization techniques to provide accurate and stable magnetic switch points.
The circuit design provides an inte rnally controlled clocking m echanism to cycle power to the Hall element and analog signal processing circuits. This serves to place the h igh current-consuming portions of the circu it into a “Sleep” m ode.Periodically the device is “A wakened” by this internal logic and the magnetic f lux from the Hall elem ent is evaluated against the predefined thresholds. If the f lux density is above or below the Bop/Brp thresholds then the output transistor is driven to change s tates accordingly. While in the “Sleep” cy cle the outpu t transistor is latched in its prev ious state. The design has been optim ized for service in applications requiring extended operating lifetime in battery powered systems.

The output transistor of the JTM90248 will be latched on (Bop) in the pre sence of a sufficiently strong South or North m agnetic field facing the m arked side of the package. The output will be latched off (Brp) in the absence of a magnetic field.

二.产品特点(Features)
Micropower consumption for battery powered
applications
Omnipolar, output switches with absolute value of
North or South pole from magnet
Operation down to 2.5V
High sensitivity for direct reed switch replacement
applications
Chopper stabilized amplifier stage
三,应用范围 (Applications)

Solid state switch
Handheld Wireless Handset Awake Switch
Lid close sensor for battery powered devices

Magnet proximity sensor for reed
switch replacem ent in low duty cycle

applications

四.下载产品资料PDF文档

jtm90248

五,产品封装图 (Package)

NAME	NO	STATUS	DESCRIPTION
Vdd	1	P	Power Supply
Out	2	O	output
Gnd	3	P	IC Ground

六.电路原理图

七,功能概述
Eastera's pole-independent sensing technique allows for operation with either a north pole or south pole magnet orientation,enhancing the manufacturability of the device. The state-of-the-art technology
provides the same output polarity for either pole face
It is strongly recommended that an external bypass capacitor be connected (in close proximity to the Hall sensor) between the supply and ground of the device to reduce both external noise and noise
generated by the chopper-stabilization technique. This is especially true due to the relatively high impedance of battery supplies.

八,相关产品\

型号	工作电压	静态电流	驱动电流	饱和压降	工作温度	封装	替代型号
L9110	2.5V-12V	1uA	0.8A	1V	-20到85度	SOP-8	LG9110
JTM2501	3V-12V	1uA	0.8A	1V	-25到125度	SOP-8	AE2501
JTM117	2.2V-5.5V	10uA	600mA	0.6V	-20到85度	SOP-8
JTM118	2.2V-7.6V	10uA	1.5A	1.5V	-20到85度	SOP-8


型号	反向工作电压	最小击穿电压	反向电流	结电容	保护等级	封装	替代型号
JTM3205	5V	7.5V	1uA	1pF	ESD:15KV	SOT-26	MAX3205/SRV05-4/AOZ8900/
JTM3205	5V	7.5V	1uA	1pF	ESD:15KV	SOT-26	SERV05-4/ESDA6V8UF



型号	工作电压	工作电流	ESD	工作点	释放点	磁滞	封装	替代型号
JTM90248	2.5-5.5V	7uA	4Kv	38 Gs	21 Gs	14Gs	SOT-23/	MLX90248/A180/A3212/TLE4913/
JTM90248	2.5-5.5V	7uA	4Kv	38 Gs	21 Gs	14Gs	TO-92	EW6672/A3214/MH248