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ISLA224S Folha de dados(PDF) 9 Page - Intersil Corporation |
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ISLA224S Folha de dados(HTML) 9 Page - Intersil Corporation |
9 / 38 page ISLA224S 9 FN7911.0 December 20, 2011 CML Outputs Output Rise Time tR 165 ps Output Fall Time tF 145 ps Data Output Duty Cycle 50 % Differential Output Resistance 100 Ω Differential Output Voltage (Note 13) 760 mVP-P SPI INTERFACE (Notes 14, 15) SCLK Period t CLK Write Operation 7 cycles tCLK Read Operation 16 cycles CSB ↓ to SCLK↑ Setup Time tS Read or Write 2 cycles CSB ↑ after SCLK↑ Hold Time tH Read or Write 5 cycles Data Valid to SCLK ↑ Setup Time tDS Read or Write 6 cycles Data Valid after SCLK ↑ Hold Time tDH Read or Write 4 cycles Data Valid after SCLK ↓ Time tDVR Read 4 cycles NOTES: 11. The Tri-Level Inputs internal switching thresholds are approximately. 0.43V and 1.34V. It is advised to float the inputs, tie to ground or AVDD depending on desired function. 12. The synchronous clock divider reset function is available as a (SPI-programmable) overload on the SYNC input. 13. The voltage is expressed in peak-to-peak differential swing. The peak-to-peak single-ended swing is 1/2 of the differential swing. 14. The SPI interface timing is directly proportional to the ADC sample period (tS). Values above reflect multiples of a 4ns sample period, and must be scaled proportionally for lower sample rates. ADC sample clock must be running for SPI communication. 15. The SPI may operate asynchronously with respect to the ADC sample clock. Switching Specifications Boldface limits apply over the operating temperature range, -40°C to +85°C. (Continued) PARAMETER SYMBOL CONDITION MIN (Note 6) TYP MAX (Note 6) UNITS Typical Performance Curves All Typical Performance Characteristics apply under the following conditions unless otherwise noted: AVDD = OVDD = 1.8V, TA = +25°C, AIN =-2dBFS, fIN = 105MHz, fSAMPLE = 250MSPS. FIGURE 3. SNR AND SFDR vs fIN FIGURE 4. HD2 AND HD3 vs fIN 50 55 60 65 70 75 80 85 90 95 0 100 200 300 400 500 600 700 INPUT FREQUENCY (MHz) SFDR AT 200 MSPS SFDR AT 250 MSPS SFDR AT 125 MSPS SNR AT 250 MSPS SNR AT 200 MSPS SNR AT 125 MSPS -100 -95 -90 -85 -80 -75 -70 -65 -60 -55 -50 0 100 200 300 400 500 600 700 INPUT FREQUENCY (MHz) HD2 AT 200 MSPS HD2 AT 250 MSPS HD2 AT 125 MSPS HD3 AT 250 MSPS HD3 AT 200 MSPS HD3 AT 125 MSPS |
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Descrição semelhante - ISLA224S |
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