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PDF KMA199 Data sheet ( Hoja de datos )
| Número de pieza | KMA199 | |
| Descripción | Programmable angle sensor | |
| Fabricantes | NXP Semiconductors | |
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KMA199
Programmable angle sensor
Rev. 01 — 26 April 2010
Product data sheet
1. Product profile
1.1 General description
The KMA199 is a magnetic angle sensor system. The MagnetoResistive (MR) sensor
bridges and the mixed signal Integrated Circuit (IC) are integrated into a single package.
This angular measurement system KMA199 is pre-programmed, pre-calibrated and
therefore, ready to use.
The KMA199 allows user specific adjustments of angular range, zero angle and clamping
voltages. The settings are stored permanently in an Electrically Erasable Programmable
Read-Only Memory (EEPROM).
1.2 Features and benefits
High precision sensor for magnetic
Ratiometric analog output voltage
angular measurement
Automotive qualified in accordance with Single package sensor system
AEC-Q100
Programmable user adjustments,
High temperature range up to 160 °C
including zero angle and angular range
Fail-safe EEPROM
Built-in transient protection
Independent from the magnetic field Programming via One-Wire Interface
strength above 35 kA/m
(OWI)
User-programmable 32-bit identifier
Magnet-loss and power-loss detection
Ready to use
Factory calibrated
1 page  
NXP Semiconductors
KMA199
Programmable angle sensor
α
Hext
001aag741
Fig 2. Angular measurement directions
Since the Anisotropic MR (AMR) effect is periodic over 180°, the sensor output is also
180°-periodic, where the angle is calculated relative to a freely programmable zero angle.
The dashed line indicates the mechanical zero degree position.
6. Analog output
The KMA199 provides one analog output signal on pin OUT/DATA. The measured angle
α is converted linearly into a value, which is ratiometric to the supply voltage VDD. Either a
positive or a negative slope is provided for this purpose.
The following table describes the analog output behavior for a positive slope. If for
example, a magnetic field angle, above the programmed maximum angle αmax, but below
the clamp switch angle αsw(CL) is applied to the sensor, then analog output is set to the
upper clamping voltage. If the magnetic field angle is larger than the clamp switch angle,
the analog output switches from upper to lower clamping voltage. In the case of a
negative slope, the clamping voltages are changed.
Table 3. Analog output behavior for a positive slope
Magnetic field angle
Analog output
αmax < α < αsw(CL)
αsw(CL) < α < αref + 180°
V(CL)u
V(CL)l
The analog output voltage range codes both angular and diagnostic information. A valid
angle value is between the upper and lower clamping voltage. If the analog output is in the
diagnostic range, that is below 4 %VDD or above 96 %VDD, an error condition has been
detected. The analog output repeats every 180°.
KMA199_1
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 01 — 26 April 2010
© NXP B.V. 2010. All rights reserved.
5 of 36
5 Page 
NXP Semiconductors
1.40
1.35
|Δφang|
(deg)
1.10
0.75
0.65
(1)
(2)
KMA199
Programmable angle sensor
0
−20
−16 −12.25
−1 0 1
(1) −40 °C to +160 °C.
(2) −40 °C to +140 °C.
Fig 5. Envelope curve for the magnitude of angular error
12.25
16 20
α1 − α0 (deg)
001aal765
Table 12. Dynamics
Characteristics are valid for the operating conditions, as specified in Section 9.
Symbol Parameter
Conditions
Min
ton turn-on time
until first valid result
[1] -
fupd update frequency
2
ts settling time
after an ideal mechanical
angle step of 45°, until 90 %
of the final value is reached;
CL = 5 nF
-
tcmd(ent)
enter command mode time after power on
16
[1] After reaching the power-on threshold voltage.
Typ
-
3.125
-
Max
5
-
1.8
Unit
ms
kHz
ms
- 26 ms
Table 13. Digital interface
Characteristics are valid for the operating conditions, as specified in Section 9.
Symbol Parameter
Conditions
VIH HIGH-level input voltage
VIL LOW-level input voltage
VOH HIGH-level output voltage IO = 2 mA
VOL LOW-level output voltage IO = 2 mA
Iod overdrive current
absolute value for overdriving
the output buffer
tstart start time
LOW level before rising edge
Min
80
-
80
-
-
5
KMA199_1
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 01 — 26 April 2010
Typ
-
-
-
-
-
-
Max
-
20
-
20
20
Unit
%VDD
%VDD
%VDD
%VDD
mA
- μs
© NXP B.V. 2010. All rights reserved.
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| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet KMA199.PDF ] | |
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