TLE4964-2M datasheet(45/91 Pages) INFINEON

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Angle sensors

TLE5309D

Dual angle sensor combining iAMR and iGMR technology

Combined iAMR and iGMR based angle sensors

The TLE5309D is a diverse redundant angle sensor with analog outputs. It com-

bines a Giant Magneto Resistance (GMR) sensor for full 360° angle range with

an Anistropic Magneto Resistance (AMR) sensor for high precision in a flipped

configuration in one package. Sine and cosine angle components of a rotating

magnetic field are measured by Magneto Resistive (MR) elements. The sensors

provide analog sine and cosine output voltages that describe the magnetic angle

in a range of 0 to 180° (AMR sensor), and 0 to 360° (GMR sensor), respectively.

The differential MR bridge signals are independent of the magnetic field strength, and the analog output is designed for

differential or single ended applications.

The output voltages are designed to use the dynamic range of an A/D-converter using the same supply as the sensor as

voltage reference. Both sensor ICs are supplied independently by separate supply and ground pins.

Summary of features

› Separate supply pins for AMR and GMR sensor

› Diverse redundant design with one GMR sensor (top die) and one AMR sensor (bottom die) in one package

› Low current consumption and very fast start up

› 360° contactless angle measurement

› Immune to airgap variations due to MR based sensing principle

› Operating temperature: -40°C to 125°C (ambient temperature)

Potential applications

The TLE5309D angle sensor is designed for angular position sensing in safety critical automotive applications. Its high accuracy and

360° measurement range combined with short propagation delay makes it suitable for systems with high speeds and high accuracy de-

mands such as brush-less DC (BLDC) motors for actuators and electric power steering systems (EPS). At the same time its fast start-up

time and low overall power consumption enables the device to be employed for low-power turn counting. Extremely low power con-

sumption can be achieved with power cycling, where the advantage of fast power on time reduces the average power consumption.

› BLDC motors for electric power steering (EPS)

› Low-power turn counter

Low power IC

(always on)

ECU

AMR sensor

EPS rotor

Sensor magnet

Turn info, position for

plausibilization

Turn count,

plausibilization angle

Supply

Rotor position for motor commutation

GMR sensor

TLE5309D

Diagnostic functions in combination with iAMR and iGMR diversity supports ASIL D applications

TLE4964-2M датащи(PDF) 45 Page - Infineon Technologies AG

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