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AD7997BRU-1REEL Scheda tecnica(PDF) 8 Page - Analog Devices |
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AD7997BRU-1REEL Scheda tecnica(HTML) 8 Page - Analog Devices |
8 / 32 page AD7997/AD7998 Rev. 0 | Page 8 of 32 AD7997/AD7998 Limit at TMIN, TMAX Parameter Conditions Min Max Unit Description t10 Standard mode 300 ns tFDA, fall time of SDA signal Fast mode 20 + 0.1 CB 300 ns High speed mode CB = 100 pF max 10 80 ns CB = 400 pF max 20 160 ns t11 Standard mode 1000 ns tRCL, rise time of SCL signal Fast mode 20 + 0.1 CB 300 ns High speed mode CB = 100 pF max 10 40 ns CB = 400 pF max 20 80 ns t11A Standard mode 1000 ns tRCL1, rise time of SCL signal after a repeated start condition and after an Acknowledge bit Fast mode 20 + 0.1 CB 300 ns High speed mode CB = 100 pF max 10 80 ns CB = 400 pF max 20 160 ns t12 Standard mode 300 ns tFCL, fall time of SCL signal Fast mode 20 + 0.1 CB 300 ns High speed mode CB = 100 pF max 10 40 ns CB = 400 pF max 20 80 ns tSP Fast mode 0 50 ns Pulse width of suppressed spike High speed mode 0 10 ns tPOWER-UP 1 typ µs Power-up time 1 A device must provide a data hold time for SDA in order to bridge the undefined region of the SCL falling edge. 2 For 3 V supplies, the maximum hold time with CB = 100 pF max is 100 ns max. P S S P t6 t4 t1 t3 t5 t8 t2 t11 t12 t6 SCL SDA t7 t9 t10 S = START CONDITION P = STOP CONDITION Figure 2. Timing Diagram for 2-Wire Serial Interface |
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