Infineon introduces linear Hall sensors

Infineon Technologies AG has introduced two new programmable linear Hall sensors designed for use in automotive and industrial applications requiring highly accurate rotation and position detection.

The new TLE4997 and TLE4998 sensors offer the highest accuracy of Infineon's linear Hall sensors and are fully automotive qualified.

Additionally, the TLE4997 sensor provides temperature compensation and the new TLE4998 sensor adds compensation of stress over lifetime.

Both sensors are suited for a wide range of applications.

Automotive applications include, for example, pedal and throttle positioning, suspension control, torque sensing and gear-stick position detection.

In the industrial area, the sensors are ideal for use in robotics and automation applications, medical equipment and high-current sensing applications, such as uninterruptable power supplies.

The analogue output TLE4997 is rated for output noise that is a factor of two smaller than the output noise of competitor products.

The fully digital output of the TLE4998 has a sensitivity stability three to four times better than that of sensors without stress-compensation.

Also, the offset drift stability of both sensors over the full temperature range of -40 to 150C is by two to three times better than the offset drift stability of other sensors available on the market.

The TLE4997 offers low ratiometric error over the full operating temperature range.

The TLE4997 and TLE4998 sensors both feature EEPROM-programmable parameters including offset, bandwidth, polarity, output clamping, coefficients for compensation of a magnet's temperature drifts and memory lock, making them highly versatile in a broad spectrum of linear and angle position sensing applications.

Both sensors operate at three selectable ranges which include +/-50, +/-100 or +/-200 millitesla (mT) and have high precision output with up to 16-bit resolution (dependent on the output protocol).

The advanced temperature compensation features implemented in the TLE4997 are further supplemented by stress compensation features in the TLE4998.

Thus, the TLE4998 provides outstanding performance stability over both temperature and lifetime.

As a result, the sensor delivers the same reliable outputs regardless of environmental effects and ageing.

This feature is particularly important for safety critical applications such as steering torque sensing in cars.

Packaged in the proven PG-SSO-3-10 leaded package, Infineon's product family is offering a broad range of interface options.

The TLE4997 focuses on applications requiring analogue output signals.

The TLE4998 offers a broad range of digital interfaces including Pulse Width Modulation (PWM), Single Edge Nibble Transmission (SENT) as well as Short PWM Codes (SPC).

The TLE4998 is available in two additional leaded packages: the PG-SSO-4-1 package, which is only 1mm thin, thus allowing inserting it into even smaller air-gaps; and the PG-SSO-3-9 package with two additional capacitors directly integrated on the lead frame, further improving the EMC capabilities of the TLE4998 product and also offering advantages in the ease of module design and system cost.

The digital second-order temperature compensation avoids process spread known from conventional analogue compensations.

System suppliers benefit from maximum flexibility and a fast production flow, as fast and easy deterministic two-point calibration is combined with programmable transfer functions such as gain, offset, clamping, bandwidth and temperature characteristics.

Temperature characteristics are stored in the EEPROM during the end-of-line programming.

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