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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 1000 3 TYP. 8 - +1.5 3 5 1200 100 MAX. V mV V ---------------kA m mV/V k mA s UNIT
1998 Mar 24
2
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 1500 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
3
Philips Semiconductors
Preliminary specification
Magnetic field sensor
CHARACTERISTICS Tamb = 25 C unless otherwise specified. SYMBOL VCC Hy Hx S TCVO PARAMETER bridge supply voltage operating range in sensitive direction operating range perpendicular to sensitive direction sensitivity temperature coefficient of output voltage open circuit VCC = 5 V; Tamb = -25 to +125 C ICC = 3 mA; Tamb = -25 to +125 C Rbridge bridge resistance resistance pins 2 to 3 Tbridge = -25 to +125 C TCRbridge temperature coefficient of bridge resistance Voffset TCVoffset FH Rflip Iflip tflip Risol Visol f offset voltage temperature coefficient of offset voltage hysteresis of output voltage resistance of set/reset conductor resistance pins 1 to 8 recommended flipping current for stable operation flip pulse duration isolating resistance voltage between isolated systems operating frequency resistance pins 1 to 2, 1 to 4, 2 to 4 voltage pins 1 to 2, 1 to 4, 2 to 4 current pins 1 to 8 Tbridge = -25 to +125 C CONDITIONS - -0.2 -0.2 12 - - 1 - -1.5 -3 - 1 800 1 1 - 0 MIN. 5 - - 16 -0.4 -0.1 - 0.3 - - - 3 1000 3 - - - TYP. 8 +0.2 +0.2 - - - 3 - +1.5 +3 2 5 1200 100 - 50 1 MAX.
KMZ50
UNIT V kA/m kA/m mV V ---------------kA m %/K %/K k %/K mV/V V V --------------K %FS mA s M V MHz
1998 Mar 24
4
Philips Semiconductors
Preliminary specification
Magnetic field sensor
PACKAGE OUTLINE SO8: plastic small outline package; 8 leads; body width 3.9 mm
KMZ50
SOT96-1
D
E
A X
c y HE vMA
Z 8 5
Q A2 A1 pin 1 index Lp 1 e bp 4 wM L detail X (A 3) A
0
2.5 scale
5 mm
DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT mm inches A max. 1.75 A1 0.25 0.10 A2 1.45 1.25 A3 0.25 0.01 bp 0.49 0.36 c 0.25 0.19 D (1) 5.0 4.8 0.20 0.19 E (2) 4.0 3.8 0.16 0.15 e 1.27 HE 6.2 5.8 L 1.05 Lp 1.0 0.4 Q 0.7 0.6 v 0.25 0.01 w 0.25 0.01 y 0.1 Z (1) 0.7 0.3
0.010 0.057 0.069 0.004 0.049
0.019 0.0100 0.014 0.0075
0.244 0.039 0.028 0.050 0.041 0.228 0.016 0.024
0.028 0.004 0.012
8 0o
o
Notes 1. Plastic or metal protrusions of 0.15 mm maximum per side are not included. 2. Plastic or metal protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION SOT96-1 REFERENCES IEC 076E03S JEDEC MS-012AA EIAJ EUROPEAN PROJECTION
ISSUE DATE 95-02-04 97-05-22
1998 Mar 24
5
Philips Semiconductors
Preliminary specification
Magnetic field sensor
DEFINITIONS Data Sheet Status Objective specification Preliminary specification Product specification Limiting values
KMZ50
This data sheet contains target or goal specifications for product development. This data sheet contains preliminary data; supplementary data may be published later. This data sheet contains final product specifications.
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information Where application information is given, it is advisory and does not form part of the specification. LIFE SUPPORT APPLICATIONS These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such improper use or sale.
1998 Mar 24
6
Philips Semiconductors
Preliminary specification
Magnetic field sensor
NOTES
KMZ50
1998 Mar 24
7
Philips Semiconductors - a worldwide company
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For all other countries apply to: Philips Semiconductors, International Marketing & Sales Communications, Building BE-p, P.O. Box 218, 5600 MD EINDHOVEN, The Netherlands, Fax. +31 40 27 24825 (c) Philips Electronics N.V. 1998
Internet: http://www.semiconductors.philips.com
SCA57
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights.
Printed in The Netherlands
115106/00/02/pp8
Date of release: 1998 Mar 24
Document order number:
9397 750 03594

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