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LRI512 데이터시트(PDF) 47 Page - STMicroelectronics |
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LRI512 데이터시트(HTML) 47 Page - STMicroelectronics |
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47 / 54 page ![]() 47/54 LRI512 Table 59. AC Characteristics Note: 1. PA Min is the minimum H-field required to communicate with the LRI512 PA Max is the maximum H-field that the device can support before clamping the incoming signal Symbol Parameter Test Condition (in addition to those in Table 57) Min. Typ. Max. Unit fCC External RF Signal Frequency 13.553 13.56 13.567 MHz MICARRIER 10% Carrier Modulation Index MI=(A-B)/(A+B) 10 30 % tRFR, tRFF 10% Rise and Fall time 0 3.0 µs tRFSBL 10% Minimum Pulse Width for bit 7.1 9.44 µs MICARRIER 100% Carrier Modulation Index MI=(A-B)/(A+B) 95 100 % tRFR, tRFF 100% Rise and Fall time 0 3.5 µs tRFSBL 100% Minimum Pulse Width for bit 7.1 9.44 µs tJIT Bit pulse Jitter -2 +2 µs tMAX Maximum Carrier Rise Time Zero to Maximum field strength induced Voltage on Coil 3 V/µs tMINCD Minimum Time from Carrier Generation to First Data From H-field min 0.1 1 ms fSH Subcarrier Frequency High FCC/32 423.75 kHz fSL Subcarrier Frequency Low FCC/28 484.28 kHz t1 Time for LRI512 Response 4224/FS 313 320.9 322 µs t2 Time between Commands 4224/FS 309 311.5 314 µs rL Resistive Load (for Modulation) 500 1000 2000 Ω PA H-field Energy on LRI512 Antenna A1T/ISOR 0.15 5 A/m A1S/ISOR 0.15 5 A/m A2T/ISOK 0.15 5 A/m C40 1 5 A/m tW Programming Time 5ms |
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