NXP magnetoresistive sensors KMA2xx series

NXP magnetoresistive
sensors KMA2xx series
Improve the ride with fully integrated
angular sensor systems
These advanced sensors, with their ability to help reduce emissions, increase vehicle stability, and
add driver-independent control functions, create a safer, cleaner, more comfortable ride, and help
realize the future of green cars.
Key features
`` Contactless angle measurements up to 180°
`` High temperature range up to 160 °C
`` Automotive qualification according to AEC-Q100
`` Excellent EMC and ESD performance
`` No external components required
`` Overvoltage protection up to 16 V
`` Reflow capable due to MSL1
The NXP KMA2x magnetoresistive (MR) angular sensors support
the worldwide commitment to reduce CO2 emissions from cars.
They help OEMs enhance their engine concepts, creating new
ways to meet environmental targets.
Key benefits
`` Insensitive to
- magnetic drift over lifetime
- magnetic drift with temperature
- mechanical tolerances
- mechanical shifts caused by thermal stress
In diesel engines, they can assist with particle filter regeneration
by throttling the intake air and thereby reducing the amount of
emitted particulate mass.
Applications
`` Throttle position
`` Pedal position
`` Active suspension
`` Wiper position
`` Electronic steering
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.
As part of the load control unit on drive-by-wire engines,
the sensors can enable a range of features, including driverindependent control of air intake, control functions for idle
speed and cruise control, and Electronic Stability Program (ESP)
functions.
Fully integrated single angular sensor KMA210
This is the first in a new family of system-in-package solutions
that require no external components. It integrates NXP’s
latest magnetoresistive sensor chip, produced in six-inch
technology, plus a unique signal conditioning ASIC, developed
in ABCD9 technology. It is specially designed to improve overall
performance and increase robustness in automotive applications.
The solution also contains two embedded capacitors in the same
package. This lowers cost as no PCB or external filter components
are required for operation.
MR sensor
ABCD9 ASIC
Capacitors
VDD
GND
Vout
Highlights
`` The ABCD9 technology, with its Silicon-on-Insulator process,
is an automotive-grade technology based on NXP’s CMOS14
process.
`` Electromagnetic Compatibility (EMC) performance is
significantly enhanced compared to previous sensor products
with integrated ASICs.
`` With respect to robustness, the KMA210 sensor is qualified
according to the new HMM (Human Metal Model) and therefore
extremely robust with excellent electrostatic discharge (ESD)
behavior.
Specification
Overvoltage protection
Number of outputs
Operating temperature range
Dual-sensor application
KMA210
+16 V
1x analog
-40 to +160 °C
Temperature drift error
-25 to +125 ° (3 sigma)
-40 to +140 ° (3 sigma)
Referred to 25 ° (3 sigma)
±0.8 °
±0.55 °
Linearity error
-40 to +140 °
-40 to +160 °
±1.0 °
±1.2 °
Diagnosis
Assembly example
ESD and CRC at power on
Magnet lost
Power lost
aaa-000490
Single-sensor application
Fully integrated dual -channel angular sensor KMA220
Like KMA210 this product is a fully integrated sensor as well but
containing two sensor channels. It is intended for all applications
requiring redundant sensor solutions as e.g. throttle applications.
The sensor is equipped with two MR sensor dies and two ASICs
providing two statistical independent output signals. Furthermore
the block capacitor for the supply line and the two capacitors for
both outputs are inside the package as well. KMA220 does not
require any external components for stable operation.
Two MR sensors
Two ASICs
KM
A22
0
Three Capacitors
aaa-001711
Highlights
`` Uses the KMA210 ASIC, do it delivers the same key
performance parameters, including excellent performance for
EMC and ESD.
`` Enables significant cost reductions by making it possible to use
a disc magnet instead of a ring magnet configuration. Distortion
from external magnetic fields is negligible because the sensor
operates in magnetic saturation for all angles.
Specification 1)
Overvoltage protection
Number of outputs
Ambient operating temperature range
KMA220
+16 V
2x analog:
(1 output per channel)
-40 to +160 °C
Temperature drift error
-25 to +125 ° (3 sigma)
-40 to +140 ° (3 sigma)
Referred to 25 ° (3 sigma)
±0.8 °
±0.55 °
Linearity error
-40 to +140 °
-40 to +160 °
±1.0 °
±1.2 °
Diagnosis
1)
Data subject to change until final release
ESD and CRC at power on
Magnet lost
Power lost
Assembly example
Coming soon:
Fully integrated angular sensor KMA215 with SENT
protocol
This derivative, based on the KMA210, will replace the analog
output signal with the digital SENT protocol. The part will comply
to SAE2716 JAN2010 (rev. 3), and, thanks to a special pushpull output with pulse shaping, will be a fully integrated sensor
equipped with all the required capacitors.
SENT
Highlights
`` Similar to the KMA210 but with the following:
- Digital output: SENT J2716 rev. 3
- 12-bit angular resolution
- Temperature information (e.g. accuracy ±10 °C)
- Push-pull output with pulse shaping
- SOT1288 package with integrated capacitors
- Overvoltage protection and inverse-polarity current protection
- Product configuration similar to KMA210 (zero angle, range)
KMA2xx overview
Specification Overvoltage protection
Number of outputs
Ambient operating temperature range
KMA210
KMA220 1)
KMA215 1)
+16 V
+16 V
+16 V
1x analog
2x analog
(1 output per channel)
1x SENT
-40 to +160 °C
Temperature drift error
-25 to +125 ° (3 sigma)
-40 to +140 ° (3 sigma)
Referred to 25 ° (3 sigma)
±0.8 °
±0.55 °
±0.8 °
±0.55 °
±0.8 °
±0.55 °
Linearity error
-40 to +140 °
-40 to +160 °
±1.0 °
±1.2 °
±1.0 °
±1.2 °
±1.0 °
±1.2 °
ESD and CRC at power on
Magnet lost
Power lost
ESD and CRC at power on
Magnet lost
Power lost
ESD and CRC at power on
Diagnosis
1)
Data subject to change until final release
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© 2011 NXP Semiconductors N.V.
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Date of release: December 2011
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