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KMA36 Arkusz danych(PDF) 5 Page - TE Connectivity Ltd |
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KMA36 Arkusz danych(HTML) 5 Page - TE Connectivity Ltd |
5 / 18 page KMA36 Contactless Rotational and Linear Encoder SENSOR SOLUTIONS /// KMA36 Rev 11 4/2016 Page 5 System parameters Symbol Parameter Condition Min. Typ. Max. Unit fdata Update rate1) 2) 24 720 Hz tstart Starting time MCU 5 ms tstart Starting time PWM output 20 ms αrd Resolution digital H0=25 kA/m, I2C mode 3) 13 5) 15 Bit αra Resolution analog H0=25 kA/m, PWM mode 3) 10 Bit Δα Accuracy 4) H0=25 kA/m 3) Top=25°C, I2C mode, Oversampling=32 ±0.3 ±1 ° ΔαH Hysteresis error (Repeatability) 4) H0=25 kA/m 3) Top=25°C, I2C mode, Oversampling=32 ±0.1 ±0.25 ° Vbwn Brown-out reset voltage 2.7 V tbwn Brown-out reset pulse width 2 µs Hy Applied magnetic field PWR-Bit = 0 15 25 60 kA/m RCOIL Internal coil resistance 75 100 150 Ω ICOIL Internal coil current H0=25 kA/m 15 20 40 mA fPWM PWM frequency 7.8 kHz Table 4: System parameters 1) Maximum is measured in speed mode with minimum oversampling. Minimum is measured with maximum oversampling. 2) When using the analog-output configuration then update rate is fixed at 88Hz 3) System parameters apply only for recommended measurement setup (please refer to the arrangement section) 4) Hysteresis and accuracy are depending nearly inversely proportional on the magnetic field strength. The accuracy is defined as the max. angular difference between actual field angle and measured angle. The hysteresis is defined as angular difference between left and right turn 5) Using higher resolutions than 13 Bit may cause “missing bits” / increased linearity error. |
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