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AD9772AAST Datasheet(PDF) 5 Page - Analog Devices |
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AD9772AAST Datasheet(HTML) 5 Page - Analog Devices |
5 / 32 page REV. A –5– AD9772A (TMIN to TMAX, AVDD = 3.3 V, CLKVDD = 3.3 V, PLLVDD = 0 V, DVDD = 3.3 V, IOUTFS = 20 mA, differential transformer coupled output, 50 doubly terminated, unless otherwise noted.) DIGITAL FILTER SPECIFICATIONS Parameter Min Typ Max Unit MAXIMUM INPUT DATA RATE (fDATA) 150 MSPS DIGITAL FILTER CHARACTERISTICS Passband Width 1: 0.005 dB 0.401 fOUT/fDATA Passband Width: 0.01 dB 0.404 fOUT/fDATA Passband Width: 0.1 dB 0.422 fOUT/fDATA Passband Width: –3 dB 0.479 fOUT/fDATA LINEAR PHASE (FIR IMPLEMENTATION) STOPBAND REJECTION 0.606 fCLOCK to 1.394 fCLOCK 73 dB GROUP DELAY 2 21 Input Clocks IMPULSE RESPONSE DURATION –40 dB 36 Input Clocks –60 dB 42 Input Clocks NOTES 1Excludes sin(x)/x characteristic of DAC. 2Defined as the number of data clock cycles between impulse input and peak of output response. Specifications subject to change without notice. FREQUENCY – DC TO fDATA 0 –140 0 1 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 –20 –40 –60 –80 –100 –120 Figure 2a. FIR Filter Frequency Response—Baseband Mode TIME – Samples 1 –0.4 0 5 10 15 20 25 30 35 40 45 0.8 0.6 0.4 0.2 0 –0.2 Figure 2b. FIR Filter Impulse Response—Baseband Mode Table I. Integer Filter Coefficients for Interpolation Filter (43-Tap Half-Band FIR Filter) Lower Upper Integer Coefficient Coefficient Value H(1) H(43) 10 H(2) H(42) 0 H(3) H(41) –31 H(4) H(40) 0 H(5) H(39) 69 H(6) H(38) 0 H(7) H(37) –138 H(8) H(36) 0 H(9) H(35) 248 H(10) H(34) 0 H(11) H(33) –419 H(12) H(32) 0 H(13) H(31) 678 H(14) H(30) 0 H(15) H(29) –1083 H(16) H(28) 0 H(17) H(27) 1776 H(18) H(26) 0 H(19) H(25) –3282 H(20) H(24) 0 H(21) H(23) 10364 H(22) 16384 |
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