Position sensors for a safer,
cleaner, more comfortable ride
Key features
} Contactless angle measurements up to 180°
} High temperature range up to 160 °C
} Automotive qualification acc. to AEC Q100
Key benefits
} Insensitive to
- magnetic drift during lifetime
- magnetic drift with temperature
- mechanical tolerances
- mechanical shifts caused by thermal stress
Applications
} Throttle position
} Pedal position
} Wiper position
} Electronic steering
} Active suspension
} Automatic headlight adjustment
These advanced sensors, with their ability to help reduce emissions, increase vehicle stability,
add driver-independent control functions, and help realize the future of green cars.
The NXP KMA and KMZ series of magneto-resistive (MR)
position sensors support the worldwide commitment to reduce
CO2 emissions from cars. They help OEMs enhance their
engine concepts, creating new ways to meet emissions targets.
In electronic valve actuators, for example, they can help reduce
untreated emissions through optimization of the combustion
air supply and the recirculation rate of exhaust gas.
In diesel engines, they can assist with particle filter
regeneration by throttling the intake air and thereby reducing
the amount of emitted particulate mass.
As part of the load control unit on drive-by-wire engines,
the sensors can enable a range of features, including driver-
independent control of air intake, control functions for idle
speed and cruise control, and Electronic Stability Program
(ESP) functions.
NXP magneto-resistive
sensors KMA & KMZ series
KMA series: KMA199, KMA199E and KMA200
The KMA series, which includes the KMA199, KMA199E,
KMA200 is a family of pre-aligned, ready-to-use angular sensor
systems. Each device consists of a magneto-resistive element
equipped with two independent MR sensor
bridges and a signal-conditioning IC. Each device is housed
in a special multi-chip package that allows 90° bending of
the MR element.
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KMA199 / KMA199E sensor systemKMA200 sensor system
MR sensor MR sensor
ASIC ASIC
Protection
diode
Protection
diode
Selection guide: KMA series
Specification KMA200 KMA199E Preliminary KMA199
Over-voltage protection /
inverse polarity protection
26.5 V
-16.5 V
Coupled transient &
ESD pulses without
galvanic coupled
Coupled transient &
ESD pulses without
galvanic coupled
Number of outputs 2x analog
1x digital
1x analog 1x analog
Operating temperature range -40 to +160 °C -40 to +160 °C -40 to +160 °C
Temperature drift error
-25 to +125 °C (3sigma)
-40 to +140 °C (3sigma)
Referred to +25 °C (3sigma)
±0.64°
–
–
–
±0.80°
±0.55°
–
±0.80°
±0.55°
Linearity error
-40 to +140 °C
-40 to +160 °C
–
±1.65° (1)
–
±1.55°
±1.00 °
±1.20 °
Diagnostics Full set of diagnostic features CRC at power on
Magnet lost
Power lost
CRC at power on
Magnet lost
Power lost
(1) Corresponds to overall angular error, including temperature drift.
KMA200 features
} Programmable angle range: up to 180°
} Operating temperature range: -40 to +160 °C
} Ratiometric analog output
} Four analog and two digital output modes selectable
} Over- and reverse-voltage protection
} On-line diagnosis of all functional blocks
} User-programmable EEPROM
KMA199/199E features
} Programmable angle range: up to 180°
} Operating temperature: -40 to 160 °C
} Ratiometric analog output
} Two analog output modes selectable
} Detects magnet lost and power lost
} Failsafe EEPROM (programmable via one-wire interface)
Selection guide: KMA series
Preliminary Specification KMA210
Over-voltage protection /
inverse polarity protection
+16 V
Reverse: current limited
Number of outputs 1x analog
Operating temperature range -40 to +160 °C
Temperature drift error
-25 to +125 °C (3sigma)
-40 to +140 °C (3sigma)
Referred to +25 °C (3sigma)
–
±0.80°
±0.55°
Linearity error
-40 to +140 °C
-40 to +160 °C
±1.00 °
±1.20 °
Diagnostics CRC at power on
Magnet lost
Power lost
(1) Corresponds to overall angular error, including temperature drift.
KMA series: Upcoming angular sensor system KMA210
The upcoming KMA210 is a next-generation version of the
KMA199. It adds capacitors to the package and as a result
requires no external components for operation. It uses an
ABCD9 ASIC and offers over-voltage protection up to 16 V.
The integrated capacitors deliver supply blocking of 47 nF
and output decoupling of 2.2 nF. Engineering samples of the
KMA210 will be available Q3, 2009, followed by production
volumes in early 2011.
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0 180 mechanical
angle (°)
min. output voltage
max. output voltage
ratiometric
voltage
(V)
clamp high
clamp low
diagnostic area
diagnostic area
KMA210 sensor system
Example KMA210 application
redundant sensor with ring magnet
KMA210 features
} Programmable angle range: up to 180°
} Operating temperature range: -40 to +160 °C
} Ratiometric analog output
} Over-voltage protection
} Detects magnet lost and power lost
} Failsafe non-volatile memory with write protection (lock bit)
} Enhanced EMC and ESD performance
} Built-in capacitors
} No external components required
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9
MR sensor
ASIC
Capacitor
Capacitor
www.nxp.com
Date of release: August 2009
Document order number: 9397 750 16772
Printed in the Netherlands
© 2009 NXP B.V.
All rights 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.
KMZ series: Upcoming angular sensor system KMZ60
The KMZ series includes angular sensors designed for use
in brushless (BL) DC motors and steering applications. Each
device consists of a magneto-resistive element equipped with
two independent MR sensor bridges and two instrumentation
amplifiers with temperature compensation. The upcoming
KMZ60 offers performance similar to the KMZ43T, but with
increased output levels and temperature compensation.
Available in a small SO8 package, it supports level-shift
functions in microcontroller applications. Engineering samples
of the KMZ60 will be available Q4 of 2009, with production
volumes planned for early 2011.
Output signals
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VOUT1
VOUT2
Ch2 Freq
39.8884 Hz
Ch1
Tek Stop: 50.0 kS/s 343 Acqs
500 mV M10.0 ms −10 mV500 mVCh2 Ch2
Ch1 Freq
40.1930 Hz
T
T
CURRENT
MULTIPLIER
U / I
BAND
GAP
cos
Vin1p
Vin1n
I = f(Temp)
I = f(Vcc)
sin
R3
R2
R1
GNDS
VDDS
Vin2p
Vin2n VOUT2
GND
VDD
VOUT1
KMZ60 application
KMZ60 package
KMZ60 features
} Temperature-compensated output amplitude
} Ratiometric output voltage
} Temperature-compensation circuit can be switched off
in case of external compensation
} Temperature sensor output
KMZ60 operating parameters
Preliminary Specification KMZ60
Ambient working temperature range (1) 40 to 150 °C
Supply voltage range 3.0 to 5.5 V
Maximum supply current (2) < 12 mA
Linearity error (3) -0.5 to +0.5°
Phase error at 25,000 rpm < 1.5°
Amplitude matching of output signals (4) ≤ ±2%
Peak-to-peak output voltage > 30% to <60%VDD
(1) Over full specification
(2) Including maximum permissible output loads
(3) After offset compensation and amplitude correction
(4) For sinusoidal input signals inside the permissible output range up to 1 kHz
