KMZ10C,112 NXP Semiconductors, KMZ10C,112 Datasheet
KMZ10C,112
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KMZ10C T/R
KMZ10C T/R
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KMZ10C,112 Summary of contents
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DISCRETE SEMICONDUCTORS DATA SHEET General Magnetic field sensors File under Discrete Semiconductors, SC17 1998 Jun 12 ...
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Philips Semiconductors Magnetic field sensors GENERAL INTRODUCTION Contents Operating principles Philips magnetoresistive sensors Flipping Effect of temperature on behaviour Using magnetoresistive sensors Further information for advanced users – The MR effect – Linearization – Flipping – Temperature compensation. 1998 Jun ...
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Philips Semiconductors Magnetic field sensors The KMZ range of magnetoresistive sensors is characterized by high sensitivity in the detection of magnetic fields, a wide operating temperature range, a low and stable offset and low sensitivity to mechanical stress. They therefore ...
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Philips Semiconductors Magnetic field sensors R handbook, halfpage Fig.3 The resistance of the permalloy as a function of the external field. handbook, full pagewidth 1998 Jun 12 In this basic form, the MR effect can be used effectively for angular ...
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Philips Semiconductors Magnetic field sensors Two further resistors are included, as shown in Fig.5. T These are for trimming sensor offset down to (almost) zero during the production process. handbook, halfpage ...
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Philips Semiconductors Magnetic field sensors Flipping The internal magnetization of the sensor strips has two stable positions. So, if for any reason the sensor is influenced by a powerful magnetic field opposing the internal aligning field, the magnetization may flip ...
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Philips Semiconductors Magnetic field sensors Figure 7 also shows that the flipping itself is not instantaneous, because not all the permalloy strips flip at the same rate. In addition, it illustrates the hysteresis effect exhibited by the sensor. For more ...
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Philips Semiconductors Magnetic field sensors 15 handbook, full pagewidth V O (mV/ Fig.9 Output voltage ‘V ’ fraction of the supply voltage of a KMZ10B sensor as a function of transverse field o ‘H ’ ...
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Philips Semiconductors Magnetic field sensors Figure 10 is similar to Fig.9, but with the sensor powered by a constant current supply. Figure 10 shows that, in this case, the temperature dependency of sensitivity is significantly reduced. This is a direct ...
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Philips Semiconductors Magnetic field sensors Using magnetoresistive sensors The excellent properties of the KMZ magnetoresistive sensors, including their high sensitivity, low and stable offset, wide operating temperature and frequency ranges and ruggedness, make them highly suitable for use in a ...
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Philips Semiconductors Magnetic field sensors Further information for advanced users EFFECT In sensors employing the MR effect, the resistance of the sensor under the influence of a magnetic field changes moved through an angle ...
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Philips Semiconductors Magnetic field sensors R handbook, halfpage Fig.13 The resistance of the permalloy as a function of the external field H after linearization (compare with Fig.6). For sensors using Barber poles arranged at an angle of +45 to the ...
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Philips Semiconductors Magnetic field sensors The following general recommendations for operating the KMZ10 can be applied: To ensure stable operation, avoid operating the sensor in an environment where it is likely to be subjected to negative external fields (‘ H ...
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Philips Semiconductors Magnetic field sensors handbook, full pagewidth R1 offset R3 KMZ10B R2 Fig.16 KMZ10B application circuit with instrumentation amplifier. The amplification of the input stage (‘OP1’ and ‘OP2’) is given by ...
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Philips Semiconductors Magnetic field sensors WEAK FIELD MEASUREMENTS Contents: Principles of weak field sensing Philips sensors for weak field measurement Application examples Test modules. Principles of weak field sensing Measurement of weak magnetic fields such as the earth’s geomagnetic field ...
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Philips Semiconductors Magnetic field sensors coil H y sensor Fig.18 Flipping coil. handbook, full pagewidth I F FLIPPING SOURCE 1998 Jun 12 Flipping causes a change in the polarity of the sensor output signal and this can be used to ...
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Philips Semiconductors Magnetic field sensors handbook, full pagewidth V O Fig.20 Timing diagram for flipping circuit (a) output voltage; (b) filtered output voltage; (c) output voltage filtered and demodulated. 1998 Jun 12 T flipping current ...
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Philips Semiconductors Magnetic field sensors S ENSOR TEMPERATURE DRIFT The sensitivity of MR sensors is also temperature dependent, with sensitivity decreasing as temperature increases (Fig.21).The effect on sensor output is certainly 15 handbook, full pagewidth V O (mV/ ...
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Philips Semiconductors Magnetic field sensors The simplest form of temperature compensation is to use a current source to supply to the sensor instead of a voltage source. In this case, the resulting reduction in sensitivity due to temperature is partially ...
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Philips Semiconductors Magnetic field sensors The optimal method of compensating for temperature dependent sensitivity differences in MR measurements of weak fields uses electro-magnetic feedback. As can be seen from the sensor characteristics in Figs 21 and 22, sensor output is ...
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Philips Semiconductors Magnetic field sensors The influence of other disturbing fields can also be eliminated provided they are well known, by adding a second current source to the compensating coil. Such fields might be those arising from the set-up housing, ...
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Philips Semiconductors Magnetic field sensors Philips sensors for weak field measurement Philips Semiconductors has at present four different sensors suitable for weak field applications, with the primary device being the KMZ51, an extremely sensitive sensor with integrated compensation and set/reset ...
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Philips Semiconductors Magnetic field sensors Typical drive circuit The principles of an application circuit required to achieve the performance mentioned, using the KMZ51, are described below (based on the simplified circuit in Fig.26). The fully compensated circuit is described; various ...
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Philips Semiconductors Magnetic field sensors handbook, full pagewidth R1 Ua IC6A V CC GND KMZ51 COMPENSATION block 3 U ref FLIPPING GENERATOR R15 R14 IC1B C3 R16 The ‘flipper’ circuit (Block 1) generates the flipping current, with ...
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Philips Semiconductors Magnetic field sensors handbook, halfpage ( 0.25 0 ( Fig.27 Oscillograph of flipping current sensor. This circuit actually produces the necessary ...
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Philips Semiconductors Magnetic field sensors Block 4 (rectification) performs synchronous rectification of the flipped signal, to recover measured field information this block performs alternate +1 and 1 amplification, depending whether the sensor is operating ...
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Philips Semiconductors Magnetic field sensors handbook, full pagewidth COMPASS 1 SENSITIVE DIRECTION Fig.29 Simplified block diagram of an electronic compass. Both of the sensors deliver a single sinewave when rotated in the Earth’s geomagnetic field (see Fig.29). This two dimensional ...
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Philips Semiconductors Magnetic field sensors handbook, full pagewidth handbook, full pagewidth 1998 Jun 12 Front View Compensation coils Flipping coil H xs sensor coordinates H ys MLC758 KMZ10A1 (2x) Fig.30 Compass sensor system. Signals (V) Sensor signal x 5 (U1) ...
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Philips Semiconductors Magnetic field sensors B. High-end compass Compass resolution can be increased from the basic eight by adapting the evaluation circuit and using a microcontroller to calculate the arctan function of the ratio of the two signals to determine ...
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Philips Semiconductors Magnetic field sensors handbook, full pagewidth 44 mm 1998 Jun GND ref compass H y test unit SMD 56 mm Fig.34 SMD test unit. 30 General ...
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Philips Semiconductors Magnetic field sensors handbook, halfpage E ARTH GEOMAGNETIC FIELD COMPENSATION IN The Earth’s geomagnetic field has always caused problems for TV and monitor manufacturers influences the trajectory of electrons in a CRT tube producing a horizontal ...
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Philips Semiconductors Magnetic field sensors handbook, halfpage Fig.37 Geometry error - horizontal picture tilt. handbook, halfpage Fig.38 Geometry error - North/South trapezoid. T RAFFIC DETECTION As the number of vehicles using already congested roads steadily increases, traffic control systems are ...
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Philips Semiconductors Magnetic field sensors 40 handbook, full pagewidth H (A/ Fig.39 Spectra for an Opel Kadett from ground sensor. The sensor modules also proved sensitive enough to detect and distinguish motorbikes (even with engine, ...
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Philips Semiconductors Magnetic field sensors 6 handbook, full pagewidth H (A/ For the roadside test in Hamburg, the road was chosen at random and the maximum signal value was recorded for different vehicles, being grouped ...
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Philips Semiconductors Magnetic field sensors The signals in each group seem to have a Gaussian distribution with a characteristic maximum (although in fact there were only three trucks, so the values for this group are an estimate). B. Airport ground ...
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Philips Semiconductors Magnetic field sensors CURRENT MEASUREMENT Contents: Principles Some practical sensing set-ups Measurement examples using Philips’ sensors. Principles The principle of measuring current with a magnetoresistive sensor is straightforward current, i, flows through a wire, it generates ...
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Philips Semiconductors Magnetic field sensors handbook, halfpage Fig.43 Simple set-up for measuring current using a KM110B/2 sensor with an external magnet. Fig.44 Sensor sensitivity versus distance for wires with diameters ranging from 0.3 to 2.0 mm. 1998 Jun 12 60 ...
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Philips Semiconductors Magnetic field sensors Not surprisingly, sensor sensitivity rises as distance ‘a’ decreases. For relatively large values of ‘a’ (say 5 mm), the increase in sensitivity is substantially linear, but at closer spacings, when the magnetic field generated by ...
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Philips Semiconductors Magnetic field sensors Both these first two set-ups allow current measurement without breaking the conductor or interfering with the circuit in any way, providing a distinct advantage over resistor based systems. They can be used, for example, for ...
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Philips Semiconductors Magnetic field sensors Table 8 Summary of advantages and disadvantages of typical measurement set-ups CURRENT MEASUREMENT WITH TWO MAGNETIC FIELD SENSORS PROS no galvanic connection no breaking of the conductor small physical dimensions reduced sensitivity to sensor-conductor distance ...
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Philips Semiconductors Magnetic field sensors handbook, halfpage Fig.47 Diagram showing set-up for AC current measurement. handbook, full pagewidth 1 4 KMZ110B KMZ110B/2 1998 Jun 12 auxiliary magnet KM110B/2 1 wire 1. ...
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Philips Semiconductors Magnetic field sensors This circuit shown in Fig. pre-tested design for 50 Hz currents, delivering very high sensitivity. Two KM110B/2 sensors are connected in parallel, with T1 aligned such that the signals produced by external disturbing ...
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Philips Semiconductors Magnetic field sensors handbook, full pagewidth Setup 1 A KMZ51 Setup Setup Fig.50 Sensor positioning for single-sided PCBs: (a) track directly under the sensor, same side of the PCB; (b) track ...
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Philips Semiconductors Magnetic field sensors After the output signals of the two sensors have been merged, the basic conditioning circuitry is similar to that used for weak field measurement. The basic principles of the electronics are described in more detail ...
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Philips Semiconductors Magnetic field sensors H DC IGH CURRENT MEASUREMENTS Interest in sensors for contactless measurement of high currents has been steadily increasing and to help customers apply this technology, Philips has prepared a module for testing, based on our ...
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Philips Semiconductors Magnetic field sensors handbook, full pagewidth Fig.54 Circuit diagram for a current sensor based on this module. 5 handbook, halfpage Fig.55 Typical response of a current sensor ...
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Philips Semiconductors Magnetic field sensors LINEAR POSITION AND PROXIMITY MEASUREMENT Contents: Principles and standard set-ups Position measurement applications Reference set-ups. Principles and standard set-ups The sensitivity of magnetoresistive sensors lends itself to linear position measurement systems, with a number of ...
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Philips Semiconductors Magnetic field sensors If a strong magnetic field is used or the sensor is placed very close to the magnet, there is a danger that the auxiliary field will exceed field required to flip the sensor characteristic, producing ...
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Philips Semiconductors Magnetic field sensors By orienting a sensor’s axis to 45 with respect to the axis of the permanent magnet, as shown in Fig.58 possible to use the sensor along with a comparator proximity switch. ...
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Philips Semiconductors Magnetic field sensors The obvious advantage of this technique is that the precise location of the sensor/magnet combination is irrelevant and as the sensor is basically acting as a ‘null-field’ detector at this point, the set-up is also ...
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Philips Semiconductors Magnetic field sensors handbook, full pagewidth 10 handbook, full pagewidth 10 1998 Jun 12 length of magnet (mV KMZ10B KMZ10C (b) Fig.63 Sensor output as a function of ...
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Philips Semiconductors Magnetic field sensors The first graph shows that as the separation distance increases, the curve flattens out. This is because as the sensor is moved closer to the magnet, the transverse field H of the magnet has a ...
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Philips Semiconductors Magnetic field sensors handbook, full pagewidth 10 handbook, full pagewidth 10 1998 Jun 12 length of magnet V o (mV (b) Fig.67 Sensor output as a function of displacement. length of magnet V o ...
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Philips Semiconductors Magnetic field sensors The most noticeable difference in these curves, compared to the parallel results, is the lack of hysteresis switching. This is due partly to the auxiliary magnet stabilizing the sensor and the fact that the orientation ...
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Philips Semiconductors Magnetic field sensors Fig.70 Sensor KM110B/2 perpendicular to magnet field using RES190 magnet. handbook, full pagewidth 400 Fig.71 Sensor output as a function of displacement using RES190 magnet. 1998 Jun 12 x handbook, halfpage ...
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Philips Semiconductors Magnetic field sensors Reference set-ups The following are two common set-ups (Fig.72 and Fig.73) that could be used for linear position measurement in real-life applications, together with typical response curves. handbook, full pagewidth i o (mA ...