TLE4997E2 Infineon Technologies, TLE4997E2 Datasheet
TLE4997E2
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TLE4997E2 Summary of contents
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TLE4997 Programmable Linear Hall Sensor Data Sheet, V 2.08, September 2008 ...
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... Infineon Technologies Office. Infineon Technologies Components may only be used in life-support devices or systems with the express written approval of Infineon Technologies failure of such components can reasonably be expected to cause the failure of that life-support device or system affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body support and/or maintain and sustain and/or protect human life ...
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TLE4997 Revision History: Previous Version: V 2.07, July 2008 Page Subjects (major changes since last revision) 12 Table 2: ESD specification (HBM) changed from 2kV to 4kV general spelling and typing errors We Listen to Your Comments Any information within ...
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Table of Contents 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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List of Figures Figure 1 Pin Configuration and Hall Cell Location . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 2 Block Diagram ...
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List of Tables Table 1 Pin Definitions and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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Programmable Linear Hall Sensor 1 Overview 1.1 Features • High linear and ratiometric push-pull rail-to-rail output signal • 20-bit Digital Signal Processing • Digital temperature compensation • 12-bit overall resolution • Operates from -40° 150°C • Low drift ...
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Target Applications • Robust replacement of potentiometers – No mechanical abrasion – Resistant to humidity, temperature, pollution and vibration • Linear and angular position sensing in automotive applications like pedal position, suspension control, valve or throttle position, headlight levelling ...
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General 2.1 Block Diagram Figure 2 shows a simplified block diagram. Supply Bias A HALL D Temp Sense Figure 2 Block Diagram 2.2 Functional Description The linear Hall IC TLE4997has been designed specifically to meet the demands ...
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Principle of Operation • A magnetic flux is measured by a Hall-effect cell. • The output signal from the Hall-effect cell is converted from Analog to Digital signals. • The chopped Hall-effect cell and continuous-time conversion ...
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Transfer Functions The examples in Figure 3 mapped to the output voltage. • Polarity Mode: – Unipolar: Only North- or South-oriented magnetic fields are measured. – Bipolar: Magnetic fields can be measured in both orientations. The limit points must ...
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Maximum Ratings Table 2 Absolute Maximum Ratings Parameter Storage temperature Junction temperature V Voltage on pins with DD respect to ground ( Supply current @ overvoltage Supply current @ reverse voltage Voltage on output pin with ...
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Operating Range The following operating conditions must not be exceeded in order to ensure correct operation of the TLE4997. All parameters specified in the following sections of this document refer to these operating conditions, unless otherwise indicated. Table 3 ...
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Electrical and Magnetic Parameters Table 4 Electrical Characteristics Parameter Output voltage range Supply current Output current @ OUT shorted to supply lines Zero field voltage Zero field voltage drift Ratiometry error Thermal resistance Power on time Power On Reset ...
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Ratiometry The linear Hall sensor works like a potentiometer. The output voltage is proportional to the supply voltage. The division factor depends on the magnetic field strength. This behavior is called “ratiometric”’. V The supply voltage should be used as ...
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Calculation of the Junction Temperature The total power dissipation P temperature. The power multiplied with the total thermal resistance to the final junction temperature. Junction to Case components thJA thJC thCA ∆ ...
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Signal Processing The flow diagram in Figure 5 Range Hall A Sensor D Temperature TC 2 Sensor Temperature Compensation Figure 5 Signal Processing Flow Magnetic Field Path • The analog output ...
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In the quadratic path, the difference temperature is squared and multiplied with the TC value. 2 • Both path outputs are added together to the gain value from the EEPROM. 6.1 Magnetic Field Ranges The working range of the ...
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Gain Setting The sensitivity is defined by the range and the gain setting. The output of the A/D Converter is multiplied with the gain value. Table 8 Gain Parameter Register size Gain range Gain quantization steps ∆ 1) For ...
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DSP Input Low Pass Filter A digital Low Pass Filter is placed between the Hall A/D Converter and the DSP to reduce the noise level. The Low Pass filter has a constant DC amplification (this is ...
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Figure 6 shows the characteristic of the filter as a magnitude plot (the highest setting is marked). The “off” position would be a flat 0 dB line. In this case, the output decimation filter limits the bandwidth of the sensor. ...
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DAC Input Interpolation Filter An interpolation filter is placed between the DSP and the output DAC. It cannot be switched off. This filter limits the frequency behavior of the complete system if the DSP input filter is disabled. The ...
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Clamping The clamping function is useful for splitting the output voltage into the operating range and error ranges. If the magnetic field is outside the selected measurement range, the V output voltage is limited to the clamping values. out ...
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Figure 8 shows an example in which the magnetic field range between is mapped to voltages between 0.8 V and 4 not necessary to signal errors, the maximum output voltage range between 0.3 V and 4.7 ...
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Error Detection Different error cases can be detected by the On-Board-Diagnostics (OBD) and reported to the microcontroller. The OBD is useful only when the clamping function is enabled important to set the clamping threshold values inside the ...
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Not Correctable EEPROM Errors The parity method is able to correct one single bit in one EEPROM line. One other single bit error in another line can also be detected. As this situation is not correctable, this status is ...
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Temperature Compensation The magnetic field strength of a magnet depends on the temperature. This material constant is specific to different magnet types. Therefore, the TLE4997 offers a second order temperature compensation polynomial, by which the Hall signal output is ...
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Parameter Calculation The parameters Now the output V for a given field OUT calculated by: V OUT B is the full range magnetic field dependent on the range setting (e.g 100 mT). ...
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Calibration A special hardware interface to an external computing system and measurement equipment is required for calibration of the sensor. All calibration and setup bits can be written into a random access memory (RAM). This allows the EEPROM to ...
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Calibration Data Memory When the MEMLOCK bits are programmed (two redundant bits), the memory contents are frozen and may no longer be changed. Furthermore, the programming interface is locked out and the chip remains in Application Mode only. This ...
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Table 18 Programming Characteristics Parameter Number of EEPROM programming cycles Ambient temperature at programming Programming time Calibration memory Error correction 1) 1 cycle is the simultaneous change of ≥ 1 bit. 2) Depending on clock frequency at VDD, write pulse ...
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Application Circuit Figure 10 shows the connection of multiple sensors to a microcontroller TLE out 47nF 4997 GND V DD TLE out 47nF 4997 GND Figure 10 Application Circuit Note: For calibration and programming, the interface must ...
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Package Outlines 12.7 ±1 6.35 ±0.4 Total tolerance at 19 pitches ± solder function area Molded body dimensions do not unclude plastic or metal protrusion of 0.15 max per side Figure 11 PG-SSO-3-10 (Plastic Green Single Small ...
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