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MCRF451 Arkusz danych(PDF) 6 Page - Microchip Technology |
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MCRF451 Arkusz danych(HTML) 6 Page - Microchip Technology |
6 / 50 page MCRF450/451/452/455 DS40232H-page 6 2003 Microchip Technology Inc. TABLE 2-3: OPERATING AC CHARACTERISTICS Standard Operating Conditions (unless otherwise stated) Operating Temperature = -20°C to +70°C. Parameters Symbol Min Typ Max Units Conditions Carrier frequency F C 2.0 13.56 35 MHz Device data rate F M 58 70 82 kHz Manchester coding, both Normal and Fast modes, 70 kHz ±17% (Note 1) Pulse width of 1-of-16 PPM for Normal mode PW PPM_N 145 175 205 µs See Figure 6-2 and Table 6-7, 175 µs ±17% Pulse width of 1-of-16 PPM for Fast mode PW PPM_F 8.3 10 11.7 µs See Figure 6-2 and Table 6-7 Symbol duration of 1-of- 16 PPM for Normal mode SW PPM_N 2.32 2.8 3.28 ms See Figure 6-9 Symbol duration of 1-of-16 PPM for Fast mode SW PPM_F 133 160 187 µs Modulation index of gap pulse MOD INDEX_GAP 20 60 100 % See Figure 6-2 Gap width of Interrogator command and data except Fast mode data GAP WIDTH_N 20 100 150 µs See Figure 6-2 and Table 6-7 Gap width of Fast mode data GAP WIDTH_F 6.0 7.0 8.0 µs See Figure 6-2 and Table 6-7 Coil voltage during reading V PP_AC 4.0 — — V PP Peak-to-Peak voltage across the coil during reading Detuning voltage V DETUNE 3.0 4.0 — V DC V DD voltage at which the input voltage limiting circuit becomes active EEPROM (Memory) Writing Time T WRITE — 5.0 — ms Write time for a 32-bit block Command Decode Time T DECODE 0.97 1.225 1.48 ms Time delay between end of command symbol and start of the device response Time slot T SLOT 2.1 2.5 2.93 ms Listening Window T LW 0.82 1.0 1.17 ms Command Duration of Fast Read command (FRR and FRB) T_CMD_ FRR 1.305 1.575 1.845 ms 175 µs/pulse position x 9 pulse positions = 1.575 ms Internal Resonant Capacitor C RES_100 85.5 95 104.5 pF Between Ant. A and V SS pads at 13.56 MHz and at 25°C (MCRF451) See Figure 2-3 C RES_2_50 27 30 33 pF Between Ant. A and V SS pads at 13.56 MHz and at 25°C (MCRF452) See Figure 2-4 C RES_50 45 50 55 pF Between Ant. A and V SS pads at 13.56 MHz and at 25°C (MCRF455) See Figure 2-5 Parasitic Input Capacitance of MCRF450 C PARA_IN — 3.5 — pF Between antenna pad A and V SS, at 13.56 MHz with modulation transistor off (no external coils). Not tested in production Note 1: Tested in production at V DD = 2.8 VDC and 5.0 VDC. |
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