參數(shù)資料
型號(hào)： AD9874ABSTZ
廠商： ANALOG DEVICES INC
元件分類(lèi)： 通信及網(wǎng)絡(luò)
英文描述： SPECIALTY TELECOM CIRCUIT, PQFP48
封裝： PLASTIC, MS-026BBC, LQFP-48
文件頁(yè)數(shù)： 20/40頁(yè)
文件大?。?/td> 1682K
代理商： AD9874ABSTZ
REV. A
AD9874
–27–
Figures 16a and 16b show expanded views of the pass band for the
two possible configurations of the third decimation filter. When
decimating by 60n (K = 0), the pass-band gain variation is 1.2 dB;
when decimating by 48n (K = 1), the pass-band gain variation is
0.9 dB. Normalization of full scale at band center is accurate to
within 0.14 dB across all decimation modes. Figures 17a and 17b
show the folded frequency response of the decimator for K = 0
and K = 1, respectively.
NORMALIZED FREQUENCY – RELATIVE TO
fOUT
0
3
0.250
dB
0.125
2
1
0
–1
–2
–3
PASS-BAND GAIN FREQUENCY = 1.2dB
Figure 16a. Pass-Band Frequency Response of
the Decimator for K = 0
NORMALIZED FREQUENCY – RELATIVE TO
fOUT
0
3
0.250
dB
0.125
2
1
0
–1
–2
–3
PASS-BAND GAIN VARIATION = 0.9dB
Figure 16b. Pass-Band Frequency Response of
the Decimator for K = 1
NORMALIZED FREQUENCY – RELATIVE TO
fOUT
0
0.50
dB
0.25
–20
–40
–60
–80
–100
–120
MIN ALIAS ATTN = 87.7dB
Figure 17a. Folded Decimator Frequency Response for K = 0
NORMALIZED FREQUENCY – RELATIVE TO
fOUT
0
0.50
dB
0.25
–20
–40
–60
–80
–100
–120
MIN ALIAS ATTN = 97.2dB
Figure 17b. Folded Decimator Frequency Response for K = 1
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