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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AD7948ARS-B датащи(PDF) 6 Page - Analog Devices |
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AD7948ARS-B датащи(HTML) 6 Page - Analog Devices |
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6 / 16 page  AD7943/AD7945/AD7948 REV. B –6– AD7945 TIMING SPECIFICATIONS1 (T A = TMIN to TMAX, unless otherwise noted) Limit @ Limit @ Parameter VDD = +3 V to +3.6 V VDD = +4.5 V to +5.5 V Units Description tDS 35 20 ns min Data Setup Time tDH 10 10 ns min Data Hold Time tCS 60 40 ns min Chip Select Setup Time tCH 0 0 ns min Chip Select Hold Time tWR 60 40 ns min Write Pulsewidth NOTES 1All input signals are specified with tr = tf = 5 ns (10% to 90% of 5 V) and timed from a voltage level of 1.6 V. Specifications subject to change without notice. DATA VALID CS tCH tDS tDH WR DB11–DB0 tCS tWR Figure 3. AD7945 Timing Diagram AD7948 TIMING SPECIFICATIONS1 (T A = TMIN to TMAX, unless otherwise noted) Limit @ Limit @ Parameter VDD = +3 V to +3.6 V VDD = +4.5 V to +5.5 V Units Description tDS 45 30 ns min Data Setup Time tDH 10 10 ns min Data Hold Time tCWS 0 0 ns min CSMSB or CSLSB to WR Setup Time tCWH 0 0 ns min CSMSB or CSLSB to WR Hold Time tLWS 0 0 ns min LDAC to WR Setup Time tLWH 0 0 ns min LDAC to WR Hold Time tWR 60 40 ns min Write Pulsewidth NOTES 1All input signals are specified with tr = tf = 5 ns (10% to 90% of 5 V) and timed from a voltage level of 1.6 V. Specifications subject to change without notice. DATA VALID DATA VALID WR tCWS tCWH tCWS tCWH tLWH tLWS tDH tDS tWR tWR tDH tDS CSMSB CSLSB LDAC DB7–DB0 Figure 4. AD7948 Timing Diagram |
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