am79d2251 Advanced Micro Devices, am79d2251 Datasheet - Page 25
![no-image](/images/manufacturer_photos/0/0/14/advanced_micro_devices_sml.jpg)
am79d2251
Manufacturer Part Number
am79d2251
Description
Dual Intelligent Subscriber Line Audio-processing Circuit Islac
Manufacturer
Advanced Micro Devices
Datasheet
1.AM79D2251.pdf
(35 pages)
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:
Level (dBm0)
–50
–30
–10
–20
–40
0
Figure 13. Spurious Out-of-Band Signals
40 kHz to 240 kHz
240 kHz to 1 MHz
4.6 kHz to 40 kHz
A
Frequency
=
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3.4
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Am79D2251
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sin
4.0
--------------------------- - dBm0
Frequency (kHz)
f 4000
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1200
–
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4.6
ISLAC Device Specification
–32 dBm0
–46 dBm0
–36 dBm0
–28 dB
Level
–32 dB
19256A-013
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