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Data Sh eet, V 2.0, M ay 2004 TLE4990 Programmable Linear Output Hall Sensor TLE4990_PHOTO Advanced Sensors Never stop thinking. Edition 2004-05 Published by Infineon Technologies AG, St.-Martin-Strasse 53, 81669 Munchen, Germany (c) Infineon Technologies AG 2004. All Rights Reserved. Attention please! The information herein is given to describe certain components and shall not be considered as a guarantee of characteristics. Terms of delivery and rights to technical change reserved. We hereby disclaim any and all warranties, including but not limited to warranties of non-infringement, regarding circuits, descriptions and charts stated herein. Information For further information on technology, delivery terms and conditions and prices please contact your nearest Infineon Technologies Office (www.infineon.com). Warnings Due to technical requirements components may contain dangerous substances. For information on the types in question please contact your nearest Infineon Technologies Office. Infineon Technologies Components may only be used in life-support devices or systems with the express written approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system, or to affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body, or to support and/or maintain and sustain and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may be endangered. TLE4990 Programmable Linear Hall Sensor Table of Contents 1 1.1 1.2 1.3 2 Page 4 4 4 4 5 5 6 6 6 6 6 7 8 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Summary of Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Target Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Zero-field Output Voltage (Vzero) . . . . . . . . . . . . . . . . . . . . . . . . . . . . Magnetic Sensitivity (S) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Temperature Gain Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clamping Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transfer Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Absolute Maximum Ratings 3 4 5 .................................. 9 Operating Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Electrical and Magnetic Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Electrical Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Magnetic Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Signal Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Magnetic Field Ranges (fixed in -E6782 version) . . . . . . . . . . . . . . . . . . . Range register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gain Setting (fixed in -E6782 version) . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gain Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Offset Setting (fixed in -E6782 version) . . . . . . . . . . . . . . . . . . . . . . . . . . . Offset Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clamping (not enabled in -E6782 version) . . . . . . . . . . . . . . . . . . . . . . . . 13 13 13 14 14 15 15 16 6 6.1 6.2 6.3 6.4 7 8 Error Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Calibration and Fusing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Data Transfer Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Programming of Sensors with Common Supply Lines . . . . . . . . . . . Sensor Interface Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 18 18 18 9 10 Application Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Package Outlines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Data Sheet 3 V 2.0, 2004-05 TLE4990 Programmable Linear Hall Sensor Overview 1 1.1 * * * * Overview Summary of Features * * * * * * * * * Very linear and ratiometric rail-to-rail output signal with push-pull output Temperature compensation Low drift of output signal over temperature and lifetime Programmable parameters stored in fuse memory: - magnetic range and magnetic sensitivity (gain) - zero field voltage (offset) - clamping option - temperature coefficient (calibrated and fused during production) - memory lock Working over temperatures from -40 C up to 150 C Single supply voltage 4.5 - 5.5 V Continuous measurement ranges between -200 mT and +200 mT or 0 and 400 mT Very slim 4-pin package with only 1mm thickness Reverse polarity and overvoltage protection for all pins Output short circuit protection On-board diagnostics (wire breakage detection) Individual programming and operation of multiple sensors with common power supply Two point calibration of magnetic transfer function 1.2 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, and steering angle * High current sensing for battery management, motor control, and electronic fuse 1.3 Type TLE4990 Ordering Information Ordering Code Q62705-K417 1) Package P-SSO-4-1 P-SSO-4-1 3) TLE4990-E6782 TLE4990-E6785 1) 2) 3) Q62705-K668 2) Q62705-K741A P-SSO-4-1 Standard type Completely calibrated and fused Temperature coefficient 0 ppm/C Data Sheet 4 V 2.0, 2004-05 TLE4990 Programmable Linear Hall Sensor Functional Description 2 Functional Description Pin Configuration Figure 1 shows the location of the hall element in the chip. Center of sensitive area 0.15 mm 2.69 0.3 0.08 mm 1.53 Branded Side Hall Probe TST OUT GND VDD TLE4990_PINOUT Figure 1 Table 1 Pin No. 1 2 3 4 Pin Configuration and Hall Cell Location Pin Definitions and Functions Symbol Function Test pin, must be grounded Output voltage / programming interface Ground Supply voltage / programming interface TST OUT GND VDD Data Sheet 5 V 2.0, 2004-05 TLE4990 Programmable Linear Hall Sensor Functional Description General The linear Hall IC TLE4990 has been designed specifically to meet the demands of highly accurate rotation and position detection, as well as for current measurement applications. The sensor provides a ratiometric analog output voltage which is ideally suited for A/D conversion with the supply voltage as a reference. The IC is produced in BiCMOS technology with high voltage capability and also providing reverse polarity protection. Zero-field Output Voltage (Vzero) The output voltage with no magnetic field present is called the zero field voltage Vzero. It is programmable within the range of 3% to 19% of VDD (for Bipolar bit = 0) and 40% to 60% of VDD (for Bipolar bit = 1) by 10 ODAC bits with a resolution of 1.0 mV to 1.2 mV. Magnetic Sensitivity (S) The magnetic sensitivity is set in two steps: First the "coarse gain" is selected out of 8 values (3 PRE bits). Then the "fine gain" is adjusted by another 10 GDAC bits. The resulting range of sensitivity extends from 15 mV/mT to 180 mV/mT at the nominal supply voltage of 5 V. Note that as the sensitivity is ratiometric, it will also depend linearly on the supply voltage. The sensitivity of the -E6782 version is programmed during production. It is calibrated to a value of 20 mV/mT at the nominal supply voltage of 5 V. Temperature Gain Compensation The temperature compensation of the sensitivity is programmed during production. The value of +350 ppm/C to provides an excellent accuracy for the use of a SmCo permanent magnet. Stability is achieved by the dynamic offset cancellation technique to eliminate any spurious mechanical or temperature effects. The -E6785 version is calibrated to 0 ppm/C. It can be used e.g. for current measurement applications. Clamping Option It is possible to reduce the output voltage swing from its original 3% ... 97% VDD to a limited swing of 10% ... 90% VDD by setting the clamping bit. This allows to detect a broken wire. In this case the output voltage is tied to 6% or 94% of VDD. The -E6782 version has this feature disabled. Data Sheet 6 V 2.0, 2004-05 TLE4990 Programmable Linear Hall Sensor Functional Description Block Diagram Figure 2 shows a simplified block diagram. OTPROM/RAM Interface Temperature Linearization Zero magnetic field voltage Chopped Hallprobe Modulator Gain Demodulator + Sample & Hold Clamping Amplifier, Buffer Out Clock Figure 2 Block Diagram Principle of Operation * * * * * * * * A magnetic flux is measured by a Hall-Effect cell. The Temperature compensation modulates the bias current of the hall cell. The output signal from the Hall-Effect cell is amplified. A zero field voltage is added. The output voltage range can be clamped by limiters. The final output value is amplified and buffered. The output voltage is proportional to the supply voltage (ratiometric bahaviour). An OBD (On Board Diagnistics) circuit connects the output to VDD or GND in case of errors. Data Sheet 7 V 2.0, 2004-05 TLE4990 Programmable Linear Hall Sensor Functional Description Transfer Functions The examples in Figure 3 show how different magnetic field ranges can be mapped to the output voltage. * Polarity mode: - Unipolar : only magnetic fields in one direction are measured. The zero field voltage is near to the GND level. - Bipolar: Magnetic fields can be measured in both orientations. The zero field voltage is about the half voltage. B (mT) 125 VOUT (V) 5 B (mT) 50 VOUT (V) 5 2.5 0 0 0 0 VOUT -125 -50 TLE4990_MAGNETIC_RANGE Example 1: Bipolar, setting used in -E6782 version Figure 3 Examples of Operation Example 2: Unipolar B B TLE4990 FIELD DIRECTION Increase of B : Increase of VOUT Figure 4 Data Sheet Increase of B : Decrease of VOUT Magnetic Field Direction Definition 8 V 2.0, 2004-05 TLE4990 Programmable Linear Hall Sensor Absolute Maximum Ratings 3 Table 2 Parameter Absolute Maximum Ratings Absolute Maximum Rating Parameters 1) Symbol Limit Values min. max. 150 160 24 16 unlimited 2.0 T kV according HBM JESD22-A114-B C C V for TA 80 C max. 10 min. for TA 80 C max. 5 min. -40 -40 -18 0.3 Unit Notes Storage temperature Junction temperature Voltage on VDD pins with respect to ground (VSS) TST TJ VDD Voltage on output pin with VOUTov respect to ground (VSS) Magnetic field ESD protection 1) BMAX VESD Only valid if the MEMlock bit is set and the TST pin is connected to GND. Note: Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. During absolute maximum rating overload conditions (VIN>VDD or VIN 9 V 2.0, 2004-05 TLE4990 Programmable Linear Hall Sensor Operating Range 4 Operating Range The following operating conditions must not be exceeded in order to ensure correct operation of the TLE4990. All parameters specified in the following sections refer to these operating conditions, unless otherwise noticed. Table 3 Parameter Supply voltage Load resistance Load capacitance Ambient temperature 4) 1) 2) 3) 4) Operating Condition Parameters1) Symbol Limit Values min. max. 5.5 50 150 V k nF C for OBD parameters 2) 3) Unit Notes VDD RL CL TA 4.5 4.7 7 0 -40 Keeping signal levels within the limits specified in this table, ensures operation without overload conditions. OBD= On Board Diagnostics (see Table 12). A minimum capacitance of 1 nF is recommended in order to improve the EMC behaviour. RTHja 150 K/W Data Sheet 10 V 2.0, 2004-05 TLE4990 Programmable Linear Hall Sensor Electrical and Magnetic Parameters 5 Table 4 Parameter Electrical and Magnetic Parameters Electrical characteristics Symbol Limit Values min. typ. 3 max. 97 5.5 1.2 11.2 18 59 50.05 10 0 0 0 100.2 0.75 8 2.3 % ms degree mVRMS kHz mV % of VDD mA mA % VDD 1) Electrical Parameters Unit Notes Output voltage range Supply current VOUT 3 3.5 -1.2 3 42 RLOAD 4.7 k IOUT = 0 mA 1) IDD Output current IOUT Output Resistance ROUT Zero field voltage VZERO Bipolar-Bit = 0 2) 3) Bipolar-Bit = 1 2) 3) only version -E6782 3) 49.95 50 Zero field voltage drift VZERO -10 -30 -30 -40 100 0.6 4 1.2 1.6 over lifetime -40C T < 25C 25C T 150C -40C T 150C 4) 5) 6) Ratiometry Power on time Max. phase shift error Output noise Maximum operating frequency 1) 2) 3) 4) 5) Rat tPon ERR 99.8 0.3 2 1.1 @ 100 Hz sine input 7) Vnoise fop -3 dB corner frequency Valid for VOUT in the range from 10% to 90% VDD. Not for the -E6782 version. @ 25 C For Sensitivity S < 80 mV/mT, for higher sensitivities the zero field drift is dominant (see Table 5). Definition: Rat = (VOUT(VDD) / VDD) / (VOUT (VDD = 5 V) / 5 V) x 100% for Vout in the range from 10% VDD to 90% VDD. The output voltage has reached 99% of its final value within tPon after power on. No external filtering, with a sensitivity of 30 mV/mT (digital switching noise included) @ 25 C. 6) 7) Data Sheet 11 V 2.0, 2004-05 TLE4990 Programmable Linear Hall Sensor Electrical and Magnetic Parameters Magnetic Parameters Table 5 Parameter Sensitivity Magnetic Characteristics Symbol Limit Values min. typ max. 180 mV/mT programmable for TLE4990 and TLE4990-E6785 1) 2) mV/mT Version -E6782 1) 3) mT Bipolar-Bit =1 4) Bipolar-Bit =0 4) Version -E6782 % ppm/ C % T 5) Unit Notes S 15 19.8 Magnetic field range 20 100 350 0 - 20.2 204.5 409 100.1 500 150 0.9 150 MFR 13.05 26.1 115.8 117.5 118.2 Linearity Temperature coefficient of sensitivity Lin 99.9 200 -150 -0.9 -500 TLE4990 and TLE4990-E6782 6) TLE4990-E6785 6) Sensitivity drift SL over lifetime Zero field drift over temperature Resolution 1) 2) Ta = 25 C valid for S > 80 mV/mT 7) 8) B0 Bn 20 - 60 TRMS @ VDD = 5 V In the lowest programmable sensitivity range a sensitivity less or equal to min(S) is guaranteed. In the highest programmable sensitivity range a sensitivity of greater or equal to max(S) is guaranteed. The ratio of max(S) / min(S) 15. @ 25 C Not for the -E6782 version. 3) 4) 5) B10% is the magnetic field, at which VOUT = 0.1 x VDD. B90% is the magnetic field, at which VOUT = 0.9 x VDD. VOUT,id = [0.1 + 0.8 x (B - B10%) / (B90% - B10%)] x VDD. Lin = (VOUT / VOUT,id - 1) * 100% for all VOUT between 10% VDD and 90% VDD. The temperature coefficient of the magnetic sensitivity is the slope of a linear least-square fit through the real curve. For lower sensitivities, the zero voltage drift is dominant (see Table 4). Equivalent to magnetic input noise at 25 C. The equivalent magnetic input noise depends on the selected sensitivity. At highest sensitivity it is typically 25 TRMS, at lowest sensitivity it is typically 50 TRMS at 25 C. 6) 7) 8) Data Sheet 12 V 2.0, 2004-05 TLE4990 Programmable Linear Hall Sensor Signal Processing 6 6.1 Signal Processing Magnetic Field Ranges (fixed in -E6782 version) The output signal of the Hall cell is amplified in the pre-amplifier. Eight ranges can be selected by setting the PRE bits. The output voltage range of 3 ... 97% of VDD leads to a swing of 4.7 V at VDD = 5 V. Therefore the product of sensitivity and full scale range is always 4.7 V. Sensitivity x Full Scale range = 4.7 V [1] I Table 6 Range Range Setting PRE bits PRE2 PRE1 0 0 1 1 0 0 1 1 Sensitivity (mV/mT) Typical Values PRE0 min. 0 1 0 1 0 1 0 1 11.49 16.17 22.75 32.00 45.04 63.38 89.16 125.5 max. Magnetic Full Scale Range (mT) min. max. 0 1 2 3 4 5 6 7 0 0 0 0 1 1 1 1 16.49 23.20 32.65 45.96 64.63 90.92 127.9 180.0 285 203 144 102 72.7 51.7 36.8 26.1 409 291 207 147 104 74.2 52.7 37.5 In the bipolar mode, the full scale range is composed of a postive and a negative part with the half value each. (e.g. 142.4 mT ... 204.4 mT in range 0). Note: The range should be set before the calibration of the gain. Range register PRE (Preamplifier) 2 1 PRE2 ... PRE0 0 Data Sheet 13 V 2.0, 2004-05 TLE4990 Programmable Linear Hall Sensor Signal Processing 6.2 Gain Setting (fixed in -E6782 version) The sensitivity is defined by the range (Preamp) and the gain setting. The output of the preamlifier is multiplied with the gain value. The sensitivity can be set in 1024 steps. Table 7 Parameter Register size Gain range Gain Register Gain 9 8 7 6 5 4 3 2 1 0 Gain Symbol Limit Values min. 1 max. 10 1.43 bit Unit Notes G9 ... G0 Table 8 Gain 1 1.43 Gain Register Setting G Dec. 0 1023 Bin. (G9 ... G0) 0000000000 1111111111 minimum gain maximum gain Remark Data Sheet 14 V 2.0, 2004-05 TLE4990 Programmable Linear Hall Sensor Signal Processing 6.3 Offset Setting (fixed in -E6782 version) The offset voltage corresponds to an output voltage with zero field at the sensor. It can be set in 1024 steps in two different voltage ranges. Table 9 Parameter Register size Offset range Offset Symbol Limit Values min. VOS 3 40 max. 10 19 60 0.97 1.22 bit % of Bipolar-Bit = 0 1) 2) Bipolar-Bit = 1 Bipolar-Bit = 0 Bipolar-Bit = 1 2) Unit Notes VDD mV Offset quantization steps 1) 2) The -E6782 version is programmed to 50% VDD. VDD = 5 V Offset Register Offset 9 8 7 6 5 4 3 2 1 0 OS9 ... OS0 Table 10 Offset Offset Register Setting OS Dec. Bin. (OS9 ... OS0) 0000000000 0000000000 1111111111 1111111111 0 1 0 1 Unipolar Bipolar Unipolar Bipolar 0 0 1023 1023 BIP Remark 3% of VDD 40% of VDD 19% of VDD 60% of VDD Data Sheet 15 V 2.0, 2004-05 TLE4990 Programmable Linear Hall Sensor Signal Processing 6.4 Clamping (not enabled in -E6782 version) The clamping function is useful to split the output voltage range into operating range and error ranges. If the magnetic field is outside the selected measurement range, the output voltage Vout is limited to the clamping values. Therefore an output voltage in the error range indicates a wire breakage (see Open Circuit (OBD parameters), Table 12) or a short circuit. The clamping function is enabled, when the clamp bit is set. Table 11 Parameter Clamping voltage low Clamping voltage high 1) Clamping Ranges Symbol Limit Values min. max. 12 92 % % of VDD 1) of VDD 1) Unit Notes VCL,low 8 VCL,high 88 RLOAD 4.7 k The following figure shows how the magnetic field range between Bmin and Bmax is mapped to voltages between 0.5 V and 4.5 V. If it is not necessary to signal errors, the clamping should be disabled. In this case the maximum output voltage range between 0.3 V and 4.7 V can be used. Vout (V) 5 4 3 2 1 0 Error range Bmin Clamping 16 V 2.0, 2004-05 Error range V CLH Operating range VCLL Bmax B Figure 5 Data Sheet TLE4990 Programmable Linear Hall Sensor Error Detection 7 Error Detection Broken supply lines can be detected by the OBD (On Board Diagnostics) and reported to the Controller. Note: The OBD is only useful when the clamping function is enabled. In the case of interrupted supply lines, the Controller may warn the user. If two sensors are placed in parallel, the output of the remaining working sensor may be still used for an emergency operation. Table 12 Parameter Output voltage @ Open VDD line Output voltage @ Open VSS line 1) Open Circuit (OBD parameters) Symbol Limit Values min. max. 6 100 % VDD % VDD 1) 1) Unit Notes VOUT VOUT 0 94 With RL 7 k Data Sheet 17 V 2.0, 2004-05 TLE4990 Programmable Linear Hall Sensor Calibration and Fusing 8 Calibration and Fusing Usually the sensor is calibrated 'End Of Line', when the complete magnetic system is assembled. This compensates all magnetic and mechanical tolerances. Note: The -E6782 version is already programmed completely. The contents of the calibration OTP memory may not be changed furthermore. During the calibraton the internal settings are stored in a RAM. When the right values are found, the information has to be stored in an one-time-programmable memory (OTP). This OTP memory consists of cavity fuses. After fusing all bits, setting the MEMLOCK bit closes the memory. This prevents from unwanted memory changes after the calibration Data Transfer Protocol A separate programming specification may be requested. Programming of Sensors with Common Supply Lines In many automotive applications two sensors are used to measure the same parameter. This redundancy allows to continue the operation in an emergency mode. If both sensors use the same power supply lines, they have to be programmed together. Sensor Interface Tool For the calibration of the sensor, a special hardware interface to a PC is required. Data Sheet 18 V 2.0, 2004-05 TLE4990 Programmable Linear Hall Sensor Application Circuit 9 Application Circuit Figure 6 shows the connection of multiple sensors to a -Controller. Ref Voltage Tracke r e.g. TLE4250 ADCref ADCin1 4.7nF 4.7nF V DD V DD optional C ADCin2 10k TLE out 4990 GND TST TLE out 4990 GND TST 10k 4.7nF 4.7nF ADCGND TLE4990_APPLICATION_CIRCUIT Figure 6 Application Circuit Data Sheet 19 V 2.0, 2004-05 TLE4990 Programmable Linear Hall Sensor Package Outlines 10 P-SSO-4-1 Package Outlines TLE4990_PACKAGE_OUTLINES Figure 7 Package Outline Data Sheet 20 V 2.0, 2004-05 TLE4990 Programmable Linear Hall Sensor TLE4990 Revision History: Previous Version: Page all 4 11 12 2004-05 V 1.0 2001-09-19 V 2.0 Subjects (major changes since last revision) Completely new layout, more information Additional versions (-E6782 and -E6785) Zero voltage drift Zero field drift We Listen to Your Comments Any information within this document that you feel is wrong, unclear or missing at all? Your feedback will help us to continuously improve the quality of this document. Please send your proposal (including a reference to this document) to: feedback.sensors@infineon.com Data Sheet 21 V 2.0, 2004-05 TLE4990 Programmable Linear Hall Sensor Data Sheet 22 V 2.0, 2004-05 TLE4990 Programmable Linear Hall Sensor Data Sheet 23 V 2.0, 2004-05 http://www.infineon.com Published by Infineon Technologies AG |
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