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Part: KMI22
Category:
Sensors
-> Velocity Sensors
-> Angular
-> Speed Sensors
Description:
Company: Philips Semiconductors
Datasheet: Download KMI22 datasheet File size : 42 kB
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Datasheet text preview:
DISCRETE SEMICONDUCTORS
DATA SHEET
M3D391
KMI22/1 Rotational speed sensor for extended air gap application and direction detection
Objective specification 2000 Sep 04
Philips Semiconductors
Objective specification
Rotational speed sensor for extended air gap application and direction detection
FEATURES · Digital current output signal · Digital offset compensation · Extended air gap · Zero speed capability · Direction detection · Digital output protocol · Three level output signal · Additional digital input pin · Wide temperature range · Insensitive to vibration · EMC resistant · Tolerant to positioning. DESCRIPTION The KMI22/1 is a sensitive rotational speed sensor for the application with ferrous gear wheels(1). The sensor consists of a magnetoresistive sensor element, a driver IC in BIMOS technology, a digital signal conditioning IC in highly integrated CMOS technology and a ferrite magnet. The digital two wire current output carries a signal proportional to the rotational speed of a gear wheel plus a digital protocol. CAUTION Do not press two or more products together against their magnetic forces.
(1) The sensor contains customized integrated circuits. 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.
handbook, halfpage
KMI22/1
PINNING PIN 1 2 3 VCC Vin V- DESCRIPTION
1
2
3
MBK766
Fig.1 Simplified outline (SOT477B).
QUICK REFERENCE DATA SYMBOL VCC ICCL ICCPH ICCSH Vin d fr Tamb 2000 Sep 04 PARAMETER DC supply voltage current output signal low current output signal protocol high current output signal speed high input voltage pin 2 sensing distance operating tooth frequency ambient operating temperature 0 5.6 11.2 22.4 0 0 to 4 0 -40 2 MIN. 12 7.0 14 28 - 0 to 4.5 - - TYP. 18 8.4 16.8 33.6 100 - 2 500 +85 MAX. V mA mA mA % VCC mm Hz °C UNIT
Philips Semiconductors
Objective specification
Rotational speed sensor for extended air gap application and direction detection
LIMITING VALUES In accordance to the Absolute Maximum Rating System (IEC 60134). SYMBOL VCC Vin Tstg Tamb Tsld PARAMETER DC supply voltage between leads 1 + 3 input voltage pin 2 storage temperature range ambient operating temperature soldering temperature output short-circuit duration short-circuit duration wrong polarity Note t < 10 s VCC to GND (see Fig.12) pin 2 to pin 1 and pin 2 to pin 3 Tamb = -40 to +65 °C; RL = 43 ; note 1 CONDITIONS Tamb = -40 to +85 °C; RL = 43 ; see Fig.12 Tamb = -40 to + 85 °C 0 V- -65 -40 - continuous continuous continuous MIN.
KMI22/1
MAX. 18 VCC +150 +85 260 V V
UNIT
°C °C °C
1. With RL = 43 the device is continuously protected against wrong polarity of DC supply voltage (VCC) to GND; see Fig.12. CHARACTERISTICS Tamb = 25 °C; VCC = 12 V; d = 2.1 mm; ft = 2 kHz; test circuit: see Fig.12; RL = 43 ; sensor positioning: see Fig.13; gear wheel: module 2 mm; material 1.0715; unless otherwise specified. SYMBOL IL IPH ISH tr tf ft din 0 Hz din 1 Hz ddir dact in 0 Hz in 1 Hz act PARAMETER current output low current output protocol high current output speed high output signal rise time output signal fall time operating tooth frequency sensing distance in initial mode for signals > 0 Hz sensing distance in initial mode for signals > 1 Hz sensing distance for safe direction detection sensing distance in active mode duty cycle in initial mode for signals > 0 Hz duty cycle in initial mode for signals > 1 Hz duty cycle in active mode CONDITIONS T = -40 to +85 °C; see Figs 6 and 8 T = -40 to +85 °C; see Figs 6 and 8; T = -40 to +85 °C; see Figs 6 and 8; CL = 100 pF; 10 to 90% value CL = 100 pF; 90 to 10% value for both rotation directions T = -40 to +85 °C see Fig.13 see Fig.13 see Fig.13 see Fig.13 T = -40 to +85 °C; see Fig.5 T = -40 to +85 °C; see Fig.5 T = -40 to +85 °C; see Fig.5 MIN. 5.6 11.2 22.4 - - 0 7 14 28 0.5 0.5 - TYP. MAX. 8.4 16.8 33.6 - - 2 500 UNIT mA mA mA µs µs Hz mm mm mm mm % % %
0 to 2.5 0 to 2.9 - 0 to 3.5 0 to 3.9 - 0 to 3 0 to 4 20 20 40 0 to 3.4 - 0 to 4.5 - 50 50 50 80 80 60
2000 Sep 04
3
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