參數(shù)資料
型號(hào)： AM79Q021VC
廠商： ADVANCED MICRO DEVICES INC
元件分類： 編解碼器
英文描述： PCM CODEC, PQFP44
封裝： TQFP-44
文件頁數(shù)： 9/64頁
文件大?。?/td> 911K
代理商： AM79Q021VC
SLAC Products
17
Discrimination against Out-of-Band Input Signals
When an out-of-band sine wave signal with frequency and level A is applied to the analog input, there may be
frequency components below 4 kHz at the digital output which are caused by the out-of-band signal. These
components are at least the specified dB level below the level of a signal at the same output originating from a
1014 Hz sine wave signal with a level of A dBm0 also applied to the analog input. The minimum specifications are
shown in the following table.
Frequency of Out-of-Band Signal
Amplitude of Out-of-Band Signal
Level below A
16.6 Hz < f < 45 Hz
–25 dBm0 < A
≤ 0 dBm0
18 dB
45 Hz < f < 65 Hz
–25 dBm0 < A
≤ 0 dBm0
25 dB
65 Hz < f < 100 Hz
–25 dBm0 < A
≤ 0 dBm0
10 dB
3400 Hz < f < 4600 Hz
–25 dBm0 < A
≤ 0 dBm0
4600 Hz < f < 100 kHz
–25 dBm0 < A
≤ 0 dBm0
32 dB
0
–10
–20
–30
–40
–50
Frequency (kHz)
3.4
4.0
4.6
–32 dB, –25 dBm0 < input < 0 dBm0
QSLAC Device Specification
Level (dB)
19256A-012
–28 dBm
Note:
The attenuation of the waveform below amplitude A between
3400 Hz and 4600 Hz is given by the formula:
Attenuation (db)
14
π 4000 f
–
()
1200
--------------------------
sin
–
=
Figure 5. Discrimination Against Out-of-Band Signals
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