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AD9774ASZ Datasheet(PDF) 5 Page - Analog Devices |
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AD9774ASZ Datasheet(HTML) 5 Page - Analog Devices |
5 / 24 page AD9774 –5– REV. B CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD9774 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. Table I. Integer Filter Coefficients for First Stage Interpola- tion Filter (55-Tap Halfband FIR Filter) Lower Upper Integer Coefficient Coefficient Value H(1) H(55) –1 H(2) H(54) 0 H(3) H(53) 3 H(4) H(52) 0 H(5) H(51) –7 H(6) H(50) 0 H(7) H(49) 15 H(8) H(48) 0 H(9) H(47) –28 H(10) H(46) 0 H(11) H(45) 49 H(12) H(44) 0 H(13) H(43) –81 H(14) H(42) 0 H(15) H(41) 128 H(16) H(40) 0 H(17) H(39) –196 H(18) H(38) 0 H(19) H(37) 295 H(20) H(36) 0 H(21) H(35) –447 H(22) H(34) 0 H(23) H(33) 706 H(24) H(32) 0 H(25) H(31) –1274 H(26) H(30) 0 H(27) H(29) 3976 H(28) 6276 Table II. Integer Filter Coefficients for Second Stage Inter- polation Filter (23-Tap Halfband FIR Filter) Lower Upper Integer Coefficient Coefficient Value H(1) H(23) –6 H(2) H(22) 0 H(3) H(21) 37 H(4) H(20) 0 H(5) H(19) –125 H(6) H(18) 0 H(7) H(17) 316 H(8) H(16) 0 H(9) H(15) –736 H(10) H(14) 0 H(11) H(13) 2562 H(12) 4096 FREQUENCY – DC TO 2 fCLOCK 0 –20 –180 0 0.5 –80 –120 –140 –160 –40 –60 –100 1.0 1.5 2.0 Figure 2a. FIR Filter Frequency Response TIME – Samples 1.0 –0.4 0 80 10 20 30 40 50 60 70 0.8 0.4 0.2 0.0 –0.2 0.6 Figure 2b. FIR Filter Impulse Response WARNING! ESD SENSITIVE DEVICE |
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