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Details, datasheet, quote on part number:KMZ51
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| Part: | KMZ51 |
| Category: | Sensors => Magnetic Sensors |
| Description: | KMZ51; Magnetic Field Sensor;; Package: SOT96 (SO8) |
| Company: | Philips Semiconductors |
| Datasheet: | Download KMZ51 datasheet File size : 57 kB |
| Request For quote: | Find where to buy KMZ51
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Datasheet text preview:
DISCRETE SEMICONDUCTORS
DATA SHEET
M3D495
KMZ51 Magnetic field sensor
Product specification Supersedes data 1998 Mar 24 2000 Jun 13
Philips Semiconductors
Product specification
Magnetic field sensor
FEATURES · High sensitivity · Integrated compensation coil · Integrated set/reset coil. APPLICATIONS · Navigation · Current and earth magnetic field measurement · Traffic detection. DESCRIPTION The KMZ51 is an extremely sensitive magnetic field sensor, employing the magnetoresistive effect of thin-film permalloy. The sensor contains one magnetoresistive Wheatstone bridge and integrated compensation and set/reset coils. The integrated compensation coil allows magnetic field measurement with current feedback loops to generate an output that is independent of drift in sensitivity. The orientation of sensitivity may be set or changed (flipped) by means of the integrated set/reset coil. A short current pulse should be applied to the compensation coil to recover (set) the sensor after exposure to strong disturbing magnetic fields. A negative current pulse will reset the sensor to reversed sensitivity. By use of periodically alternated flipping pulses and a lock-in amplifier, output is made independent of sensor and amplifier offset. QUICK REFERENCE DATA SYMBOL VCC S Voffset Rbridge Rcomp Acomp bridge supply voltage sensitivity (uncompensated) offset voltage bridge resistance compensation coil resistance compensation coil field factor; note 1 PARAMETER - 12 -1.5 1 100 19 MIN. 5 16 - - 170 22 TYP. 8 - +1.5 3 300 25 MAX. PINNING PIN 1 2 3 4 5 6 7 8 SYMBOL +Iflip VCC GND +Icomp -Icomp -VO +VO -Iflip flip coil
KMZ51
DESCRIPTION bridge supply voltage ground compensation coil compensation coil bridge output voltage bridge output voltage flip coil
handbook, halfpage
8
5
Hext
pin 1 index
1
4
MGD827
Fig.1 Simplified outline.
UNIT V mV/V ------------kA/m mV/V k A/m -----------mA
2000 Jun 13
2
Philips Semiconductors
Product specification
Magnetic field sensor
KMZ51
SYMBOL Rflip Iflip (min) tflip (min) Notes flip coil resistance
PARAMETER 1 minimum recommended flipping current; note 2 minimum flip pulse duration; note 2
MIN. 2 800 1
TYP. 3 1 000 3
MAX. 1 200 100
UNIT mA µs
1. The compensation coil generates a field Hcomp = Acomp × Icomp in addition to the external field Hext. Sensor output will become zero if Hext = -Hcomp. 2. Average power consumption of the flipping coil, defined by current, pulse duration and pulse repetition rate may not exceed the specified limit, see Chapter "Limiting values". CIRCUIT DIAGRAM
handbook, halfpage -I
F
+VO 7
-VO 6
-IC 5
8
Z1
Z1
1 +IF
2 VCC
3 GND
4 +IC
MGD793
Fig.2 Simplified circuit diagram.
LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 60134). SYMBOL VCC Ptot Tstg Tbridge Icomp Iflip (max) Pflip (max) Visol bridge supply voltage total power dissipation storage temperature bridge operating temperature maximum compensation current maximum flipping current maximum flipping power dissipation voltage between isolated systems: flip coil and Wheatstone bridge; compensation coil and Wheatstone bridge; flip coil and compensation coil PARAMETER - - -65 -40 - - - - MIN. 9 130 +150 +125 15 1 500 50 60 MAX. V mW °C °C mA mA mW V UNIT
2000 Jun 13
3
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