tle4998 Infineon Technologies Corporation, tle4998 Datasheet
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... TLE4998 User’s Manual & ...
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Edition 2008-10-30 Published by Infineon Technologies AG 81726 Munich, Germany 2008 Infineon Technologies AG © All Rights Reserved. Legal Disclaimer The information given in this document shall in no event be regarded as a guarantee of conditions or characteristics. With ...
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... TLE4998 Programmable Linear Hall Sensor Revision History: 2008-10-30, Rev 1.1 Previous Version: Rev 1.0 Page Subjects (major changes since last revision) 7 Changes in Table 1: TCAL, HCAL calculations 9 Corrected junction temperature calculation 10 Included offset and normalization in user sensitivity calculation in 12 Presented more straightforward rms error criterion in ...
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... Table of Contents Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.1 Concept of the TLE4998 Temperature Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.2 Signal Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Mathematical Background . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.1 Influence of the DSP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.2 Influence of the Hall Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.3 Overall Behaviour of the IC: The Precalibration at IFX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.4 Calibration of the Application Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Setup Part 1 - Obtaining the Magnetic Circuit Behaviour . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3 ...
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... It is recommended to read the programming description of this device before • It gives an overview and detailed description of the temperature compensation concept of the TLE4998 1.1 Concept of the TLE4998 Temperature Compensation The concept is based on shifting as much of the on-chip sensor processing as possible to the digital domain. This can be achieved by directly converting the output of the Hall probe into a digital value, without additional, purely analog pre-processing ...
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... TADC X A Cali- D brate TL TCAL Temperature Compensation Figure 2 Block Diagram of the TLE4998 Hardware-trigger TADC sample TADC value (IFX), rate ~ 400 SPS store it to TCAL store OTC out of value with TCAL, value with TCAL², add it to previous value with TCAL add it to previous ...
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... To describe the overall temperature dependent behaviour of the IC, we need to consider both the calculated DSP compensation as well as the natural (physical) temperature behaviour of the Hall probe. detailed insights in the algorithm that is performed in the TLE4998. Please note that this document treats the temperature compensation only. The determination of the two parameters GAIN and OFFSET is explained in the 2 point calibration setup document ...
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... TCAL ⎞ ⎛ ⎞ ⎞ , DSP pre ------------------------------ - --------------- - – ⎠ ⎝ ⎠ ⎠ ⋅ 32768 8192 and TQ are programmed DSP DSP DSP The TLE4998 system app TC1 (linear user user T = Rev 1.1, 2008-10-30 TLE4998 (3) , TC2 probe (4) (the (5) ( ...
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... TLE4998. In the latter case, the junction temperature TCAL used by the sensor is directly given as decimal value in degrees Celsius. To get the real junction temperature, please ⁄ ...
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... TLE4998. 3.2 Finding the User Coefficients to Compensate the Magnetic Circuit Behaviour With the given measurement setup it is possible to acquire the application sensitivity behaviour by measuring the ...
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... TC Setup Part 2 - Calculating the New EEPROM Values There is only one parameter set stored in the TLE4998 to calculate a single implemented polynomial. This means that the new user polynomial is not stored separately in the sensor, but needs to be combined with the precalibration polynomial. The new parameter set is then again stored back to the sensor. The reason is simply that the calculation must only be done once (at start of life). Further advantages are • ...
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... Temperature Coefficient Setup Guide Temperature Coefficient Setup Guide TC Setup Part 2 - Calculating the New EEPROM Values ( ) ⎞ ⎠ ⋅ user k ® ® Visual Basic , this language should be easy to understand and to map into 12 TLE4998 Equation (13) is ε , which rms (15) Rev 1.1, 2008-10-30 ...
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... First round coarse, second round fine If (Rounds = 1) Then TL_lo = 10 TL_hi = 500 TL_step = 10 TQ_lo = 10 TQ_hi = 240 TQ_step = 10 ElseIf (Rounds = 2) Then TL_lo = TL_opt - 9 User’s Manual Temperature Coefficient Setup Guide Temperature Coefficient Setup Guide TC Setup Part 2 - Calculating the New EEPROM Values 13 TLE4998 Rev 1.1, 2008-10-30 ...
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... Rem --> Finally retrieve the best TL, TQ values stored during the sweep TL_dspfinal = TL_opt TQ_dspfinal = TQ_opt At the end, only TL_dspfinal and TQ_dspfinal need to be reprogrammed in the EEPROM. User’s Manual Temperature Coefficient Setup Guide Temperature Coefficient Setup Guide TC Setup Part 2 - Calculating the New EEPROM Values 14 TLE4998 Rev 1.1, 2008-10-30 ...
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... Readout the precalibration parameters from the EEPROM • Use this data plus the required user setup to calculate a new dataset • Program the new EEPROM values User’s Manual Temperature Coefficient Setup Guide Temperature Coefficient Setup Guide TC Setup Part 2 - Calculating the New EEPROM Values 15 TLE4998 Rev 1.1, 2008-10-30 ...
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Published by Infineon Technologies AG ...