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AD6649 데이터시트(PDF) 5 Page - Analog Devices |
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AD6649 데이터시트(HTML) 5 Page - Analog Devices |
5 / 40 page AD6649 Rev. 0 | Page 5 of 40 ADC AC SPECIFICATIONS AVDD = 1.8 V, DRVDD = 1.8 V, maximum sample rate, VIN = −1.0 dBFS differential input,1 1.75 V p-p full-scale input range, DCS enabled, NCO enabled, FIR filter enabled, unless otherwise noted. Table 2. Parameter2 Temperature Min Typ Max Unit SIGNAL-TO-NOISE RATIO (SNR)3 fIN = 30 MHz 25°C 74.5 dBFS fIN = 90 MHz 25°C 74.2 dBFS fIN = 140 MHz 25°C 73.9 dBFS fIN = 185 MHz 25°C 73.4 dBFS Full 70.9 dBFS fIN = 220 MHz 25°C 72.9 dBFS SIGNAL-TO-NOISE AND DISTORTION (SINAD) fIN = 30 MHz 25°C 73.4 dBFS fIN = 90 MHz 25°C 73.0 dBFS fIN = 140 MHz 25°C 72.3 dBFS fIN = 185 MHz 25°C 71.7 dBFS Full 68.7 dBFS fIN = 220 MHz 25°C 71.0 dBFS WORST SECOND OR THIRD HARMONIC fIN = 30 MHz 25°C −92 dBc fIN = 90 MHz 25°C −88 dBc fIN = 140 MHz 25°C −85 dBc fIN = 185 MHz 25°C −85 dBc Full −80 dBc fIN = 220 MHz 25°C −89 dBc SPURIOUS-FREE DYNAMIC RANGE (SFDR) fIN = 30 MHz 25°C 92 dBc fIN = 90 MHz 25°C 88 dBc fIN = 140 MHz 25°C 85 dBc fIN = 185 MHz 25°C 85 dBc Full 80 fIN = 220 MHz 25°C 84 dBc WORST OTHER HARMONIC OR SPUR fIN = 30 MHz 25°C −95 dBc fIN = 90 MHz 25°C −94 dBc fIN = 140 MHz 25°C −93 dBc fIN = 185 MHz 25°C −93 dBc Full −80 dBc fIN = 220 MHz 25°C −84 dBc TWO-TONE SFDR fIN = 184.12 MHz, 187.12 MHz (−7 dBFS) 25°C 88 dBc CROSSTALK4 Full 95 dB ANALOG INPUT BANDWIDTH 25°C 1000 MHz 1 A −1.0 dBFS input level at the analog inputs corresponds to an output level of −2.5 dBFS when using the fixed-frequency NCO and 95 MHz FIR filter. When using the tunable-frequency NCO and 100 MHz FIR filter, the output level is −1.3 dBFS. These respective output level reductions are due to FIR filter losses. See the section for more details. FIR Filters 2 See the AN-835 Application Note, Understanding High Speed ADC Testing and Evaluation, for a complete set of definitions. 3 SNR specifications are for filtered 95 MHz bandwidth. 4 Crosstalk is measured at 100 MHz with −1 dBFS on one channel and with no input on the alternate channel. |
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