AM79C03 AMD [Advanced Micro Devices], AM79C03 Datasheet - Page 14

• Manufacturer Part Number: AM79C03
• Description: Dual Subscriber Line Audio Processing Circuit (DSLAC) Devices
• Manufacturer: AMD [Advanced Micro Devices]

Discrimination against Out-of-Band Input Signals
When an out-of-band sine wave signal with frequency f and level A is applied to the analog input, there may be
frequency components below 4 kHz at the digital output, 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 Figure 5.
14
16.6 Hz < f < 45 Hz
45 Hz < f < 65 Hz
65 Hz < f < 100 Hz
3400 Hz < f < 4600 Hz
4600 Hz < f < 100 kHz
Frequency of Out-of-Band Signal
Level (dB)
Figure 5. Discrimination against Out-of-Band Signals
–10
–40
–20
–30
–50
0
Attenuation dB
Note:
The attenuation of the waveform below amplitude A between 3400 Hz
and 4600 Hz is given by the formula:
3.4
Am79C02/03/031(A) Data Sheet
Amplitude of Out-of-Band Signal
–25 dBm0 < A
–25 dBm0 < A
–25 dBm0 < A
–25 dBm0 < A
–25 dBm0 < A
4.0
=
14 14
Frequency (kHz)
–
sin
4.6
0 dBm0
0 dBm0
0 dBm0
0 dBm0
0 dBm0
–32 dB, –25 dBm0 < input < 0 dBm0
--------------------------- -
4000 f
DSLAC Device Specification
–28 dBm
1200
–
Level below A
see Figure 5
18 dB
25 dB
10 dB
32 dB
09875H-009