TLE4941

更新时间： 2024-01-24 08:32:11

品牌	Logo	应用领域
英飞凌 - INFINEON		传感器换能器磁场传感器信息通信管理
页数	文件大小	规格书
11页	786K
描述
Differential Two-Wire Hall Effect Sensor IC

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技术参数
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TLE4941 技术参数

是否Rohs认证：	符合	生命周期：	Contact Manufacturer
包装说明：	SSO-2	Reach Compliance Code：	compliant
Factory Lead Time：	26 weeks	风险等级：	5.76
主体宽度：	1 mm	主体高度：	3.71 mm
主体长度或直径：	5.34 mm	外壳：	PLASTIC
最大磁场范围：	20 mT	最小磁场范围：	-20 mT
安装特点：	THROUGH HOLE MOUNT	最大工作电流：	8.4 mA
最大输出电流：	26 mA	输出接口类型：	2-WIRE INTERFACE
输出类型：	DIGITAL CURRENT	封装形状/形式：	RECTANGULAR
传感器/换能器类型：	MAGNETIC FIELD SENSOR,HALL EFFECT	表面贴装：	NO
端接类型：	SOLDER	Base Number Matches：	1

TLE4941 数据手册

TLE4941, TLE4941C

Functional Description

The differential hall sensor IC detects the motion of ferromagnetic and permanent

magnet structures by measuring the differential flux density of the magnetic field. To

detect the motion of ferromagnetic objects the magnetic field must be provided by a

back biasing permanent magnet. Either south or north pole of the magnet can be

attached to the rear unmarked side of the IC package.

Magnetic offsets of up to +/- 20mT and device offsets are cancelled by a self-

calibration algorithm. Only a few transitions are necessary for self-calibration. After

the initial calibration sequence switching occurs when the input signal is crossing the

arithmetic mean of its max and min value. (E.g. zero-crossing for sinusoidal signals)

The ON and OFF state of the IC are indicated by High and Low current

consumption.

Circuit Description

The circuit is supplied internally by a 3V voltage regulator. An on-chip oscillator

serves as clock generator for the digital part of the circuit.

TLE4941 signal path is comprised of a pair of hall probes, spaced at 2.5mm, a

differential amplifier including a noise-limiting low-pass filter and a comparator

feeding a switched current output stage. In addition an offset cancellation feedback

loop is provided by a signal-tracking A/D converter, a digital signal processor (DSP)

and an offset cancellation D/A converter.

During the startup phase (un-calibrated mode) the output is disabled (I=I_Low).

The differential input signal is digitized in the speed A/D converter and fed into the

DSP. The minimum and maximum values of the input signal are extracted and their

corresponding arithmetic mean value is calculated. The offset of this mean value is

determined and fed into the offset cancellation DAC.

After successful correction of the offset, the output switching is enabled.

In running mode (calibrated mode) the offset correction algorithm of the DSP is

switched into a low-jitter mode, avoiding oscillation of the offset DAC LSB. Switching

occurs at zero-crossing. It is only affected by the (small) remaining offset of the

comparator and by the remaining propagation delay time of the signal path, mainly

determined by the noise-limiting filter. Signals below a defined threshold DB_Limitare

not detected to avoid unwanted parasitic switching.

TLE4941 - TLE 4941C Data Sheet

Febrary 2002

123 4 5 6 7...11

中文翻译

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与TLE4941相关器件

型号	品牌	获取价格	描述	数据表
TLE4941-1C	INFINEON	获取价格	Analog Circuit, 1 Func, PSSS2, PLASTIC, SSO-2
TLE4941-1C-HT	INFINEON	获取价格	Analog Circuit,
TLE4941-2	INFINEON	获取价格	Differential Two-Wire Hall Effect Sensor IC
TLE4941-2C	INFINEON	获取价格	Differential Two-Wire Hall Effect Sensor IC
TLE4941C	INFINEON	获取价格	Differential Two-Wire Hall Effect Sensor IC
TLE4941CBAMA1	INFINEON	获取价格	Hall Effect Sensor, 0-20mT Min, 20mT Max, BICMOS, Plastic/Epoxy, Rectangular, Through Hole
TLE4941CE6735BTMA1	INFINEON	获取价格	Hall Effect Sensor,
TLE4941CHAMA2	INFINEON	获取价格	Hall Effect Sensor,
TLE4941PLUSC	INFINEON	获取价格	Analog Circuit, 1 Func, BICMOS, PXSS2, SSO-2-53, 2 PIN
TLE4941PLUSCAAMA1	INFINEON	获取价格	Analog Circuit,

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