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AD7755AARS Fiches technique(PDF) 3 Page - Analog Devices |
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AD7755AARS Fiches technique(HTML) 3 Page - Analog Devices |
3 / 16 page REV. B –3– AD7755 Parameter A Version B Version Unit Test Conditions/Comments POWER SUPPLY For Specified Performance AVDD 4.75 4.75 V min 5 V – 5% 5.25 5.25 V max 5 V + 5% DVDD 4.75 4.75 V min 5 V – 5% 5.25 5.25 V max 5 V + 5% AIDD 3 3 mA max Typically 2 mA DIDD 2.5 2.5 mA max Typically 1.5 mA NOTES 1See Terminology section for explanation of specifications. 2See Plots in Typical Performance Graphs. 3Sample tested during initial release and after any redesign or process change that may affect this parameter. Specifications subject to change without notice. TIMING CHARACTERISTICS1, 2 Parameter A, B Versions Unit Test Conditions/Comments t1 3 275 ms F1 and F2 Pulsewidth (Logic Low) t2 See Table III sec Output Pulse Period. See Transfer Function Section t3 1/2 t2 sec Time Between F1 Falling Edge and F2 Falling Edge t4 3, 4 90 ms CF Pulsewidth (Logic High) t5 See Table IV sec CF Pulse Period. See Transfer Function Section t6 CLKIN/4 sec Minimum Time Between F1 and F2 Pulse NOTES 1Sample tested during initial release and after any redesign or process change that may affect this parameter. 2See Figure 1. 3The pulsewidths of F1, F2 and CF are not fixed for higher output frequencies. See Frequency Outputs Section. 4The CF pulse is always 18 µs in the high frequency mode. See Frequency Outputs section and Table IV. Specifications subject to change without notice. ORDERING GUIDE Model Package Description Package Options AD7755AAN Plastic DIP N-24 AD7755AARS Shrink Small Outline Package RS-24 AD7755ABRS Shrink Small Outline Package RS-24 EVAL-AD7755EB AD7755 Evaluation Board AD7755AAN-REF AD7755 Reference Design PCB (See AN-559) (AVDD = DVDD = 5 V 5%, AGND = DGND = 0 V, On-Chip Reference, CLKIN = 3.58 MHz, TMIN to TMAX = –40 C to +85 C) .t2 .t3 t4 .t5 .t6 t1 F1 F2 CF Figure 1. Timing Diagram for Frequency Outputs |
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