參數(shù)資料
型號： AM79D2251JC
廠商： ADVANCED MICRO DEVICES INC
元件分類： 編解碼器
英文描述： Dual Intelligent Subscriber Line Audio-Processing Circuit (ISLAC)
中文描述： PCM CODEC, PQCC44
封裝： PLASTIC, LCC-44
文件頁數(shù)： 25/35頁
文件大?。?/td> 410K
代理商： AM79D2251JC
Am79D2251
25
Spurious Out-of-Band Signals
at the Analog Output
With PCM code words representing a sine wave signal in the range of 300 Hz to 3400 Hz at a level of 0 dBm0 applied
to the digital input, the level of the spurious out-of-band signals at the analog output is less than the limits shown below.
With code words representing any sine wave signal in the range 3.4 kHz to 4.0 kHz at a level of 0 dBm0 applied to
the digital input, the level of the signals at the analog output are below the limits in Figure 13. The amplitude of the
spurious out-of-band signals between 3400 Hz and 4600 Hz is given by the formula:
----- f
sin
–
=
Frequency
Level
4.6 kHz to 40 kHz
–
32 dBm0
40 kHz to 240 kHz
–
46 dBm0
240 kHz to 1 MHz
–
36 dBm0
A
14
–
14
4000
1200
–
)
0
–
10
–
20
–
30
–
40
–
50
–
28 dB
–
32 dB
ISLAC Device Specification
Frequency (kHz)
3.4
4.0
4.6
19256A-013
Level (dBm0)
Figure 13. Spurious Out-of-Band Signals
相關(guān)PDF資料
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AM79D2251VC 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:Dual Intelligent Subscriber Line Audio-Processing Circuit (ISLAC)
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