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AD9251-20EBZ Datasheet(PDF) 7 Page - Analog Devices |
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AD9251-20EBZ Datasheet(HTML) 7 Page - Analog Devices |
7 / 36 page AD9251 Rev. 0 | Page 7 of 36 SWITCHING SPECIFICATIONS AVDD = 1.8 V; DRVDD = 1.8 V, maximum sample rate, 2 V p-p differential input, 1.0 V internal reference; AIN = −1.0 dBFS, DCS disabled, unless otherwise noted. Table 4. Parameter Temp AD9251-20/AD9251-40 AD9251-65 AD9251-80 Unit Min Typ Max Min Typ Max Min Typ Max CLOCK INPUT PARAMETERS Input Clock Rate Full 625 625 625 MHz Conversion Rate1 Full 3 20/40 3 65 3 80 MSPS CLK Period—Divide-by-1 Mode (tCLK) Full 50/25 15.38 12.5 ns CLK Pulse Width High (tCH) 25.0/12.5 7.69 6.25 ns Aperture Delay (tA) Full 1.0 1.0 1.0 ns Aperture Uncertainty (Jitter, tJ) Full 0.1 0.1 0.1 ps rms DATA OUTPUT PARAMETERS Data Propagation Delay (tPD) Full 3 3 3 ns DCO Propagation Delay (tDCO) Full 3 3 3 ns DCO to Data Skew (tSKEW) Full 0.1 0.1 0.1 ns Pipeline Delay (Latency) Full 9 9 9 Cycles Wake-Up Time2 Full 350 350 350 μs Standby Full 600/400 300 260 ns OUT-OF-RANGE RECOVERY TIME Full 2 2 2 Cycles 1 Conversion rate is the clock rate after the CLK divider. 2 Wake-up time is dependent on the value of the decoupling capacitors. tPD tSKEW tCH tDCO tCLK N – 9 N – 1 N + 1 N + 2 N + 3 N + 5 N + 4 N N – 8N – 7N – 6N – 5 VIN CLK+ CLK– CH A/CH B DATA DCOA/DCOB tA Figure 2. CMOS Output Data Timing tPD tSKEW tCH tDCO tCLK CH A N – 9 CH B N – 9 CH A N – 8 CH B N – 8 CH A N – 7 CH B N – 7 CH A N – 6 CH B N – 6 CH A N – 5 N – 1 N + 1 N + 2 N + 3 N + 5 N + 4 N VIN CLK+ CLK– CH A/CH B DATA DCOA/DCOB tA Figure 3. CMOS Interleaved Output Timing |
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