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Details, datasheet, quote on part number:KMZ50
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Datasheet text preview:
DISCRETE SEMICONDUCTORS
DATA SHEET
M3D315
KMZ50 Magnetic field sensor
Preliminary specification Supersedes data of 1996 Nov 15 File under Discrete Semiconductors, SC17 1998 Mar 24
Philips Semiconductors
Preliminary specification
Magnetic field sensor
FEATURES · High sensitivity · Integrated set/reset coil. APPLICATIONS · Navigation · Current and earth magnetic field measurement · Traffic detection. DESCRIPTION The KMZ50 is an extremely sensitive magnetic field sensor, employing the magnetoresistive effect of thin-film permalloy. The sensor contains one magnetoresistive Wheatstone bridge and integrated set/reset conductors. With the integrated set/reset conductor the orientation of sensitivity may be set or changed (flipped). A short current pulse on this conductor is needed 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 will become independent of sensor and amplifier offset. PINNING PIN 1 2 3 4 5 6 7 8 SYMBOL +Iflip VCC GND n.c. n.c. -VO +VO -Iflip
KMZ50
DESCRIPTION flip coil bridge supply voltage ground not connected not connected bridge output voltage bridge output voltage flip coil
handbook, halfpage
8
5
H
pin 1 index
1
4
MGD791
Fig.1 Simplified outline.
QUICK REFERENCE DATA SYMBOL VCC S Voffset Rbridge Rflip Iflip (min) tflip (min) Note 1. Average power consumption in flip conductor, defined by current, pulse duration and pulse repetition rate may not exceed the specified limit, see "Limiting values". PARAMETER bridge supply voltage sensitivity (uncompensated) offset voltage bridge resistance flip coil resistance minimum recommended flipping current; note 1 minimum flip pulse duration; note 1 - 12 -1.5 1 1 800 1 MIN. 5 16 - - 3 1 000 3 TYP. 8 - +1.5 3 5 1 200 100 MAX. V mV / V ---------------kA / m mV/V k mA µs UNIT
1998 Mar 24
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Philips Semiconductors
Preliminary specification
Magnetic field sensor
CIRCUIT DIAGRAM
KMZ50
handbook, halfpage -I
F
+VO 7
-VO 6
n.c. 5
8
Z1
1 +IF
2 VCC
3 GND
4 n.c.
MGD792
Fig.2 Simplified circuit diagram.
LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). SYMBOL VCC Ptot Tstg Tbridge Iflip (max) Pflip (max) Visol bridge supply voltage total power dissipation storage temperature bridge operating temperature maximum flipping current maximum flipping power dissipation voltage between isolated systems: flip conductor - Wheatstone bridge PARAMETER - - -65 -40 - - - MIN. 9 130 +150 +125 1 500 50 60 MAX. V mW °C °C mA mW V UNIT
THERMAL CHARACTERISTICS SYMBOL Rth j-a PARAMETER thermal resistance from junction to ambient VALUE 155 UNIT K/W
1998 Mar 24
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