am79d2251 Advanced Micro Devices, am79d2251 Datasheet - Page 20
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am79d2251
Manufacturer Part Number
am79d2251
Description
Dual Intelligent Subscriber Line Audio-processing Circuit Islac
Manufacturer
Advanced Micro Devices
Datasheet
1.AM79D2251.pdf
(35 pages)
Attenuation Distortion
Group Delay Distortion
20
The attenuation of the signal in either path is nominally independent of the frequency. The deviations
from nominal attenuation will stay within the limits shown in Figure 6. The reference frequency is
1014 Hz and the signal level is –10 dBm0.
Minimum transmit attenuation at 60 Hz is 24 dB
For either transmission path, the group delay distortion is within the limits shown in
Figure 7. The minimum value of the group delay is taken as the reference. The signal level should
be –10 dBm0.
Delay (µS)
-0.125
0.125
0.6
2
1
0
0
150
420
Figure 6. Transmit and Receive Path Attenuation vs. Frequency
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Receive path
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Figure 7. Group Delay Distortion
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Dual ISLAC Specification
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Dual ISLAC Specification
(Either Path)
Am79D2251
Frequency (Hz)
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0.65
0.2
0.80