參數(shù)資料
型號(hào): AD9776BSVZ
廠商: Analog Devices Inc
文件頁(yè)數(shù): 25/56頁(yè)
文件大?。?/td> 0K
描述: IC DAC 12BIT DUAL 1GSPS 100TQFP
產(chǎn)品培訓(xùn)模塊: DAC Architectures
標(biāo)準(zhǔn)包裝: 1
位數(shù): 12
數(shù)據(jù)接口: 并聯(lián)
轉(zhuǎn)換器數(shù)目: 2
電壓電源: 模擬和數(shù)字
功率耗散(最大): 300mW
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 100-TQFP 裸露焊盤
供應(yīng)商設(shè)備封裝: 100-TQFP-EP(14x14)
包裝: 托盤
輸出數(shù)目和類型: 4 電流,單極
采樣率(每秒): 1G
AD9776/AD9778/AD9779
Rev. A | Page 31 of 56
INTERPOLATION FILTER ARCHITECTURE
The AD9776/AD9778/AD9779 can provide up to 8× interpola-
tion, or the interpolation filters can be entirely disabled. It is
important to note that the input signal should be backed off by
approximately 0.01 dB from full scale to avoid overflowing the
interpolation filters. The coefficients of the low-pass filters and
the inverse sinc filter are given in Table 13, Table 14, Table 15,
and Table 16. Spectral plots for the filter responses are shown in
Table 13. Half-Band Filter 1
Lower Coefficient
Upper Coefficient
Integer Value
H(1)
H(55)
4
H(2)
H(54)
0
H(3)
H(53)
+13
H(4)
H(52)
0
H(5)
H(51)
34
H(6)
H(50)
0
H(7)
H(49)
+72
H(8)
H(48)
0
H(9)
H(47)
138
H(10)
H(46)
0
H(11)
H(45)
+245
H(12)
H(44)
0
H(13)
H(43)
408
H(14)
H(42)
0
H(15)
H(41)
+650
H(16)
H(40)
0
H(17)
H(39)
1003
H(18)
H(38)
0
H(19)
H(37)
+1521
H(20)
H(36)
0
H(21)
H(35)
2315
H(22)
H(34)
0
H(23)
H(33)
+3671
H(24)
H(32)
0
H(25)
H(31)
6642
H(26)
H(30)
0
H(27)
H(29)
+20,755
H(28)
+32,768
Table 14. Half-Band Filter 2
Lower Coefficient
Upper Coefficient
Integer Value
H(1)
H(23)
2
H(2)
H(22)
0
H(3)
H(21)
+17
H(4)
H(20)
0
H(5)
H(19)
75
H(6)
H(18)
0
H(7)
H(17)
+238
H(8)
H(16)
0
H(9)
H(15)
660
H(10)
H(14)
0
H(11)
H(13)
+2530
H(12)
+4096
Table 15. Half-Band Filter 3
Lower Coefficient
Upper Coefficient
Integer Value
H(1)
H(15)
39
H(2)
H(14)
0
H(3)
H(13)
+273
H(4)
H(12)
0
H(5)
H(11)
1102
H(6)
H(10)
0
H(7)
H(9)
+4964
H(8)
+8192
Table 16. Inverse Sinc Filter
Lower Coefficient
Upper Coefficient
Integer Value
H(1)
H(9)
+2
H(2)
H(8)
4
H(3)
H(7)
+10
H(4)
H(6)
35
H(5)
+401
10
–100
–4
4
fOUT (× Input Data Rate)
ATTE
NUATION
(dB)
–3
–2
–1
0123
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
05361-054
Figure 57. 2× Interpolation, Low-Pass Response to ±4× Input Data Rate
(Dotted Lines Indicate 1 dB Roll-Off)
10
–100
–4
4
fOUT (× Input Data Rate)
ATTE
NUATION
(dB)
–3
–2
–1
0123
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
05361-055
Figure 58. 4× Interpolation, Low-Pass Response to ±4× Input Data Rate
(Dotted Lines Indicate 1 dB Roll-Off)
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