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KMI15-1 Dataheets PDF



Part Number KMI15-1
Manufacturers Philips
Logo Philips
Description Integrated rotational speed sensor
Datasheet KMI15-1 DatasheetKMI15-1 Datasheet (PDF)

DISCRETE SEMICONDUCTORS DATA SHEET handbook, halfpage M3D282 KMI15/1 Integrated rotational speed sensor Product specification Supersedes data of 2000 Jun 26 2000 Sep 05 Philips Semiconductors Integrated rotational speed sensor Product specification KMI15/1 FEATURES • Digital current output signal • Zero speed capability • Wide air gap • Wide temperature range • Insensitive to vibration • EMC resistant. PINNING PIN DESCRIPTION 1 VCC 2 V− DESCRIPTION The KMI15/1 sensor detects rotational sp.

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DISCRETE SEMICONDUCTORS DATA SHEET handbook, halfpage M3D282 KMI15/1 Integrated rotational speed sensor Product specification Supersedes data of 2000 Jun 26 2000 Sep 05 Philips Semiconductors Integrated rotational speed sensor Product specification KMI15/1 FEATURES • Digital current output signal • Zero speed capability • Wide air gap • Wide temperature range • Insensitive to vibration • EMC resistant. PINNING PIN DESCRIPTION 1 VCC 2 V− DESCRIPTION The KMI15/1 sensor detects rotational speed of ferrous gear wheels and reference marks(1). The sensor consists of a magnetoresistive sensor element, a signal conditioning integrated circuit in bipolar technology and a magnetized ferrite magnet. The frequency of the digital current output signal is proportional to the rotational speed of a gear wheel. handbook, halfpage CAUTION Do not press two or more products together against their magnetic forces. (1) The sensor contains a customized integrated circuit. Usage in hydraulic brake systems and in systems with active brake control is forbidden. For all other applications, higher temperature versions of up to 150 °C are available on request. 12 MBH781 Fig.1 Simplified outline (SOT453B). QUICK REFERENCE DATA SYMBOL VCC ICC (low) ICC (high) d ft Tamb PARAMETER DC supply voltage current output signal low current output signal high sensing distance operating tooth frequency ambient operating temperature MIN. − − − 0 to 2.5 0 −40 TYP. 12 7 14 0 to 2.9 − − MAX. − − − − 25 000 +85 UNIT V mA mA mm Hz °C 2000 Sep 05 2 Philips Semiconductors Integrated rotational speed sensor Product specification KMI15/1 LIMITING VALUES In accordance with Absolute Maximum Rating System (IEC 60134). SYMBOL PARAMETER CONDITIONS VCC Tstg Tamb Tsld DC supply voltage storage temperature Tamb = −40 to +85 °C; RL = 115 Ω ambient operating temperature soldering temperature t ≤ 10 s output short-circuit duration to GND MIN. MAX. −0.5 +16 −40 +150 −40 +85 − 260 continuous UNIT V °C °C °C CHARACTERISTICS Tamb = 25 °C; VCC = 12 V; d = 2.1 mm; ft = 2 kHz; test circuit: see Fig.7; RL = 115 Ω; sensor positioning: see Fig.15; gear wheel: module 2 mm; material 1.0715; unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. ICC (low) ICC (high) tr tf td current output signal low current output signal high output signal rise time output signal fall time switching delay time see Figs 6 and 8 5.6 see Figs 6 and 8 11.2 CL = 100 pF; see Fig.9; 10 to 90% value − CL = 100 pF; see Fig.9; 10 to 90% value − between stimulation pulse (generated by a coil) and output signal − 7 14 0.5 0.7 1 8.4 16.8 − − − ft operating tooth frequency for both rotation directions d sensing distance see Fig.15 and note 1 δ duty cycle see Fig.6 0 − 25000 0 to 2.5 0 to 2.9 − 30 50 70 UNIT mA mA µs µs µs Hz mm % Note 1. High rotational speeds of wheels reduce the sensing distance due to eddy current effects (see Fig.17). 2000 Sep 05 3 Philips Semiconductors Integrated rotational speed sensor Product specification KMI15/1 FUNCTIONAL DESCRIPTION The KMI15/1 sensor is sensitive to the motion of ferrous gear wheels or reference marks. The functional principle is shown in Fig.3. Due to the effect of flux bending, the different directions of magnetic field lines in the magnetoresistive sensor element will cause an electrical signal. Because of the chosen sensor orientation and the direction of ferrite magnetization, the KMI15/1 is sensitive to movement in the ‘y’ direction in front of the sensor only (see Fig.2). The magnetoresistive sensor element signal is amplified, temperature compensated and passed to a Schmitt trigger in the conditioning integrated circuit (Figs 4 and 5). The digital output signal level (see Fig.6) is independent of the sensing distance within the measuring range (Fig.14). A (2-wire) output current enables safe transfer of the sensor signal to the detecting circuit (see Fig.7). The integrated circuit housing is separated from the sensor element housing to optimize the sensor behaviour at high temperatures. handbook, halfpage x y magnet with direction of magnetization x z sensor IC MBH778 Fig.2 Component detail of the KMI15/1. handbook, full pagewigdethar wheel z magnet sensor y (a) 2000 Sep 05 magnetic field lines direction of motion (b) (c) Fig.3 Functional principle. 4 MRA957 (d) Philips Semiconductors Integrated rotational speed sensor Product specification KMI15/1 handbook, full pagewidth VOLTAGE CONTROL CONSTANT CURRENT SOURCE V CC SENSOR AMPLIFIER SCHMITT TRIGGER SWITCHABLE CURRENT SOURCE V MRA958 Fig.4 Block diagram. handbook, full pagewidth switchable current source sensor EMC FILTER preamplifier Schmitttrigger constant current source VCC power supply Vref GAP V MRA959 2000 Sep 05 Fig.5 Simplified circuit diagram. 5 Philips Semiconductors Integrated rotational speed sensor Product specification KMI15/1 handbook, halfpage I CC 14 mA T 7 mA tp MRA960 t SENSOR.


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