MLX90316
Rotary Position Sensor IC
3901090316
Page 11 of 34
Data Sheet
Rev. 001
4 October 05
10. MLX90316 Accuracy Specification
DC Operating Parameters at Vdd = 5V (unless otherwise specified) and for TA as specified by the
Temperature suffix (S, E or K).
All the errors expressed in Deg. Can be converted in %Vdd or %dc by using the following relationship:
Err (%Vdd) = Err (Deg)
× Output Span (%Vdd) / Angular Span (Deg) + Err_DAC + Err_OutBuf
Err (%DC) = Err (Deg)
× Output Span (%DC) / Angular Span (Deg)
Err (Serial Protocol) = Err (Deg)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
ADC Resolution
RADC
Slow – 15 bits ADC (14 + sign)
Fast – 14 bits ADC (13 + sign)
0.005
0.01
Deg/LSB15
Deg/LSB14
Thermal Offset Drift #1
Thermal Offset Drift at the DSP
input (excl. DAC and output stage)
-60
+60
LSB15 (9)
Thermal Offset Drift #2
Thermal Offset Drift of the DAC
and Output Stage
Only for the Analog Output
- 0.2
+ 0.2
%Vdd
Analog Output Resolution
RDAC
12 bits DAC
(Theoretical – Noise free)
INL
DNL
-4
0.05
0.025
1
+4
2
%Vdd/LSB
LSB
LSB
Output stage Noise
0.05
% Vdd
Noise pk-pk (10)
RG = 9, Slow mode, Filter=5
RG = 9, Fast mode, Filter=0
0.03
0.1
0.06
0.2
Deg
Deg
Ratiometry Error
-0.1
0
0.1
%
PWM Output Resolution
RPWM
12 bits
(Theoretical – Jitter free)
0.025
%DC/LSB
PWM Jitter(11)
JPWM
fPWM = 250 Hz
0.2
%DC
Serial Protocol Output
Resolution
RSP
14 bits – 360 Deg. mapping
(Theoretical – Jitter free)
0.022
Deg/LSB
Intrinsic Linearity Error
(12)
Le
360 Deg
-2
2
Deg
(9) Thermal Offset Drift #1 yields to max. ± 0.3 Deg. drift for the computed angular information (output of
the DSP).
(10) The application diagram used is described in the recommended wiring. For detailed information, refer
to section filter in application mode.
(11) Jitter is defined by ± 3 for 1000 acquisitions.
(12) The Intrinsic Linearity Error refers to the IC itself (offset, sensitivity mismatch, orthogonality) taking into
account an ideal rotating field. Once associated to a practical magnetic construction and the associated
mechanical and magnetic tolerances, the output linearity error increases. However, it can be improved
with the 2 point or 3 point end-user calibration that is available on the MLX90316.
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