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AD9774ASZ Datasheet(PDF) 5 Page - Analog Devices

Part # AD9774ASZ
Description  14-Bit, 32 MSPS TxDAC??with 43 Interpolation Filters
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD9774ASZ Datasheet(HTML) 5 Page - Analog Devices

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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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