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AD5391BCPZ-5 bảng dữ liệu(PDF) 10 Page - Analog Devices |
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10 / 40 page AD5381 Data Sheet Rev. D | Page 10 of 40 I2C SERIAL INTERFACE TIMING DVDD = 2.7 V to 5.5 V; AVDD = 4.5 V to 5.5 V or 2.7 V to 3.6 V; AGND = DGND = 0 V; all specifications T MIN to TMAX, unless otherwise noted. Table 6. Parameter 1, 2 Limit at T MIN, TMAX Unit Description F SCL 400 kHz max SCL clock frequency t 1 2.5 µs min SCL cycle time t 2 0.6 µs min t HIGH, SCL high time t 3 1.3 µs min t LOW, SCL low time t 4 0.6 µs min t HD,STA, start/repeated start condition hold time t 5 100 ns min t SU,DAT, data setup time t 6 3 0.9 µs max t HD,DAT, data hold time 0 µs min t HD,DAT, data hold time t 7 0.6 µs min t SU,STA, setup time for repeated start t 8 0.6 µs min t SU,STO, stop condition setup time t 9 1.3 µs min t BUF, bus free time between a STOP and a START condition t 10 300 ns max t R, rise time of SCL and SDA when receiving 0 ns min t R, rise time of SCL and SDA when receiving (CMOS compatible) t 11 300 ns max t F, fall time of SDA when transmitting 0 ns min t F, fall time of SDA when receiving (CMOS compatible) 300 ns max t F, fall time of SCL and SDA when receiving 20 + 0.1 C b 4 ns min t F, fall time of SCL and SDA when transmitting C b 400 pF max Capacitive load for each bus line 1 Guaranteed by design and characterization, not production tested. 2 See Figure 6. 3 A master device must provide a hold time of at least 300 ns for the SDA signal (referred to the V IH min of the SCL signal) in order to bridge the undefined region of SCL’s falling edge. 4 C b is the total capacitance, in pF, of one bus line. tR and tF are measured between 0.3 DVDD and 0.7 DVDD. START CONDITION REPEATED START CONDITION STOP CONDITION t9 t3 t1 t11 t4 t10 t4 t5 t7 t6 t8 t2 SDA SCL Figure 6. I2C-Compatible Serial Interface Timing Diagram |
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