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AD8151AST 数据表(PDF) 14 Page - Analog Devices |
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AD8151AST 数据表(HTML) 14 Page - Analog Devices |
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14 / 36 page ![]() AD8151 –14– REV. 0 CS INPUT UPDATE INPUT ENABLING OUT[0:16][N:P] OUTPUTS DISABLING OUT[0:16][N:P] OUTPUTS WE INPUT tCSU tUOT tUOE tWOT tWHU INPUT {DATA 1} INPUT {DATA 1} INPUT {DATA 2} INPUT {DATA 0} tCHU tUW tWOD Figure 5. First Rank Write Cycle and Second Rank Update Cycle Table V. First Rank Write Cycle and Second Rank Update Cycle Symbol Parameter Conditions Min Typ Max Unit tCSU Setup Time Chip Select to Update TA = 25 °C0 ns tCHU Hold Time Chip Select from Update VDD = 5 V 0 ns tUOE Output Enable Times Update to Output Enable VCC = 3.3 V 25 40 ns tWOE* Write Enable to Output Enable 25 40 ns tUOT Output Toggle Times Update to Output Reprogram 25 30 ns tWOT Write Enable to Output Reprogram 25 30 ns tUOD* Output Disable Times Update to Output Disabled 25 30 ns tWOD Write Enable to Output Disabled 25 30 ns tWHU Setup Time Write Enable to Update 10 ns tUW Width of Update Pulse 15 ns *Not Shown. A[4:0] INPUTS tCSR D[6:0] OUTPUTS tRDE tAA tRHA CS INPUT RE INPUT ADDR 1 ADDR 2 DATA {ADDR1} DATA {ADDR2} tCHR tRDD Figure 6. Second Rank Readback Cycle Table VI. Second Rank Readback Cycle Symbol Parameter Conditions Min Typ Max Unit tCSR Setup Time Chip Select to Read Enable TA = 25 °C0 ns tCHR Hold Time Chip Select from Read Enable VDD = 5 V 0 ns tRHA Address from Read Enable VCC = 3.3 V 5 ns tRDE Enable Time Data from Read Enable 10 k Ω 15 ns tAA Access Time Data from Address 20 pF on D[6:0] 15 ns tRDD Release Time Data from Read Enable Bus 15 30 ns |
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