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AS5035 데이터시트(PDF) 13 Page - ams AG |
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AS5035 데이터시트(HTML) 13 Page - ams AG |
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13 / 18 page ![]() AS5035 – 64 PPR INCREMENTAL MAGNETIC ROTARY ENCODER Revision 1.5 www.austriamicrosystems.com Page 12 of 17 12.3.3 CMOS Outputs: A, B, Index, OTP_DO Parameter Symbol Min Max Unit Note High level output voltage VOH VDD5V-0.5 V Low level output voltage VOL VSS+0.4 V Output current IO 4 2 mA mA VDD5V: 4.5V VDD5V: 3V 12.4 Magnetic Input Specification Two-pole cylindrical diametrically magnetised source: Parameter Symbol Min Typ Max Unit Note Diameter dmag 4 6 mm Thickness tmag 2.5 mm Recommended magnet Ø 6mm x 2.5mm for cylindrical magnets Magnetic input field amplitude Bpk 45 75 mT Required vertical component of the magnetic field strength on the die’s surface, measured along a concentric circle with a radius of 1.1mm Magnetic offset Boff ± 10 mT Constant magnetic stray field Field non-linearity 5 % Including offset gradient Input frequency (rotational speed of magnet) fmag_inc 500 Hz Incremental mode: no missing pulses at rotational speeds of up to 30,000 rpm Magnetic field temperature drift Btc – 0.035 %/K Samarium Cobalt ReComa28 Displacement radius Disp 0.25 mm Max. offset between defined device center and magnet axis (see Figure 11) 12.5 Electrical System Specifications Parameter Symbol Min Typ Max Unit Note LSB 1.406 deg Degrees / step Resolution RES 8 64 bit ppr Channel A and B Index bit width tw,Index 1.406 deg = 1 LSB (see Table 3) Integral non-linearity (optimum) INLopt ± 0.5 deg Maximum error with respect to the best line fit. Centered magnet placement without calibration, Tamb =25 °C. Integral non-linearity (optimum) INLtemp ± 0.9 deg Maximum error with respect to the best line fit. Centered magnet placement without calibration, Tamb = -40 to +125°C Integral non-linearity INL ± 1.4 deg Best line fit = (Errmax – Errmin) / 2 Over displacement tolerance with 6mm diameter magnet, without calibration Tamb = -40 to +125°C Differential non-linearity DNL ± 0.176 deg no missing codes Transition noise TN 0.06 Deg rms rms = 1 sigma (see 10.2) Hysteresis Hyst 0.704 deg Power-on reset thresholds On voltage; 300mV typ. hysteresis Off voltage; 300mV typ. hysteresis Von Voff 1,37 1.08 2.2 1.9 2.9 2.6 V V DC supply voltage 3.3V (VDD3V3) DC supply voltage 3.3V (VDD3V3) |
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