KMA215
Programmable angle sensor with SAE J2716 SENT
Rev. 1 — 24 February 2014
Product data sheet
1. Product profile
1.1 General description
The KMA215 is a magnetic angle sensor module with digital output in accordance with
SAE J2716 JAN2010 Single Edge Nibble Transmission (SENT). The MagnetoResistive
(MR) sensor bridges, the mixed signal Integrated Circuit (IC) and the required capacitors
are integrated into a single package.
This angular measurement module KMA215 is pre-programmed, pre-calibrated and
therefore, ready to use. The default configuration for the digital output is
SENT2010-03.0us-6dn-npp-nsp-A.3.
The KMA215 allows user-specific adjustments of angular range, zero angle and SENT
configuration. The settings are stored in a multi-time programmable non-volatile memory.
1.2 Features and benefits
High precision sensor for magnetic
High temperature range up to 160
C
angular measurement
Single package sensor module with
Overvoltage protection up to 16 V
integrated filters and pulse shaping for
improved ElectroMagnetic Compatibility
(EMC)
Automotive qualified in accordance with
Push pull output stage compliant with
AEC-Q100 Rev-G
SAE J2716 JAN2010 SENT with pulse
shaping
Programmable user adjustments,
Optional high-speed 12-bit SENT
angular range, zero angle and SENT
message format H.3
configuration
Fail-safe non-volatile memory with write
Optional enhanced serial data
protection using lock bit
communication
Independent from magnetic field
Programming via One-Wire Interface
strength above 35 kA/m
(OWI)
Ready to use without external
8 user-programmable SENT messages
components
(8
12 bit)
Factory calibrated
Magnet-loss and broken bond wire
detection
NXP Semiconductors
KMA215
Programmable angle sensor with SAE J2716 SENT
1.2.1 Extract of SENT modes (shorthand notation)
SENT2010-03.0us-6dn-npp-nsp-A.3 (default configuration)
SENT2010-03.0us-6dn-npp-esp-A.3
SENT2010-03.0us-6dn-ppc(297.0)-nsp-A.3
SENT2010-03.0us-6dn-ppc(297.0)-esp-A.3
SENT2010-06.0us-6dn-npp-nsp-A.3
SENT2010-06.0us-6dn-npp-esp-A.3
SENT2010-06.0us-6dn-ppc(297.0)-nsp-A.3
SENT2010-06.0us-6dn-ppc(297.0)-esp-A.3
SENT201x-03.0us-4dn-npp-nsp-H.3
SENT201x-03.0us-4dn-npp-esp-H.3
Additional SENT modes can be found in
Table 8, Table 12
and
Table 15.
2. Pinning information
Table 1.
Pin
1
2
3
V
DD
GND
OUT/DATA
Pinning
Description
supply voltage
ground
SENT output or OWI data interface
Simplified outline
Symbol
3. Ordering information
Table 2.
Ordering information
Package
Name
KMA215
-
Description
plastic single-ended multi-chip package;
6 interconnections; 3 in-line leads
Version
SOT1288-2
Type number
KMA215
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2014. All rights reserved.
Product data sheet
Rev. 1 — 24 February 2014
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Product data sheet
Rev. 1 — 24 February 2014
3 of 50
KMA215
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2014. All rights reserved.
4. Functional diagram
Programmable angle sensor with SAE J2716 SENT
NXP Semiconductors
KMA215
Fig 1.
Functional diagram of KMA215
NXP Semiconductors
KMA215
Programmable angle sensor with SAE J2716 SENT
5. Functional description
The KMA215 amplifies two orthogonal differential signals from MR sensor bridges and
converts them into the digital domain. The angle is calculated using the COordinate
Rotation DIgital Computer (CORDIC) algorithm and transmitted in a SENT frame
compliant to SAE J2716 SENT standard. Zero angle and angular range are
programmable. In addition, eight 12-bit Original Equipment Manufacturer (OEM) registers
are available for customer purposes, such as sample identification.
The KMA215 comprises a Cyclic Redundancy Check (CRC) and an Error Detection and
Correction (EDC) for the non-volatile memory. It also has magnet-loss and broken bond
wire detection.
After multiplexing the two MR Wheatstone bridge signals and their successive
amplification, the signal is converted into the digital domain by an Analog-to-Digital
Converter (ADC). Further processing is done within an on-chip state machine. This state
machine controls offset cancelation, calculation of the mechanical angle using the
CORDIC algorithm, as well as zero angle and angular range adjustment. The SENT
protocol generator converts the angular information into SENT messages that are
repeatedly sent via the SENT output.
The configuration parameters are stored in a user-programmable non-volatile memory.
The OWI (accessible using pin OUT/DATA) is used for accessing the memory. In order to
protect the memory content, a lock bit can be set. After locking the non-volatile memory,
its content cannot be changed anymore.
5.1 Angular measurement directions
The differential signals of the MR sensor bridges depend only on the direction of the
external magnetic field strength H
ext
, which is applied parallel to the plane of the sensor.
In order to obtain a correct output signal, exceed the minimum saturation field strength.
KMA215
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2014. All rights reserved.
Product data sheet
Rev. 1 — 24 February 2014
4 of 50
NXP Semiconductors
KMA215
Programmable angle sensor with SAE J2716 SENT
α
H
ext
001aan665
Fig 2.
Angular measurement directions
Since the Anisotropic MR (AMR) effect is periodic over 180, the sensor output is also
180-periodic. The angle is calculated relative to a freely programmable zero angle.
The dashed line indicates the mechanical zero degree position.
6. Digital output
The KMA215 SENT provides a digital output signal on pin OUT/DATA compliant with the
SAE J2716 JAN2010 SENT. The measured angle
is converted linearly into a value,
which is digital encoded in SENT frames. Either a positive or a negative angular slope
characteristic is provided for this purpose.
Table 3
describes the digital output behavior for a positive slope. A magnetic field angle
above the programmed maximum angle
max
but below the clamp switch angle
sw(CL)
sets the output to the upper clamping value. If the magnetic field angle is larger than the
clamp switch angle, the output value switches from upper to lower clamping value. If there
is a negative slope, the clamping levels are changed.
Table 3.
Digital output behavior for a positive slope
Data value
CLAMP_HI
CLAMP_LO
Magnetic field angle
max
<
<
sw(CL)
sw(CL)
<
<
ref
+ 180
KMA215
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2014. All rights reserved.
Product data sheet
Rev. 1 — 24 February 2014
5 of 50
