Cirrus Logic CS61884 - Manual (Page 57)

CS61884
DS485F3 57
19.6 Jitter Attenuator Characteristics
(TA = -40
°C to 85°C; TV+, RV+ = 3.3 V ±5%; GND = 0 V)
Notes: 18. Attenuation measured with sinusoidal input filter equal to 3/4 of measured jitter tolerance. Circuit
attenuates jitter at 20 dB/decade above the corner frequency. Output jitter can increase significantly
when more than 28 UI’s are input to the attenuator.
19. Measurement is not effected by the position of the Jitter Attenuator.
Parameter Min. Typ Max Units
Jitter Attenuator Corner Frequency T1/J1 Modes
Note 11 , 19 T1/J1 Modes
E1 Modes
(Depends on JACF Bit in host mode) E1 Modes
-
-
-
- 3.78
7.56
1.25
2.50 -
-
-
- Hz
E1 Jitter Attenuation 3 Hz to 40 Hz
Note 11 , 18 400 Hz to 100 kHz
+ 0.5
- 19.5
-
- -
- dB
T1/J1 Jitter Attenuation 1 Hz to 20 Hz
1 kHz
Note 11 , 18 1.4KHz to 100KHz
0
- 33.3
- 40
-
-
- -
-
- dB
Attenuator Input Jitter Tolerance before FIFO 32-bit FIFO
over flow and under flow Note
11 64-bit FIFO
-
- 24
56 -
- UI
UI
Delay through Jitter Attenuator Only 32-bit FIFO
Note 11 64-bit FIFO
-
- 16
32 -
- UI
UI
Intrinsic Jitter in Remote Loopback Notes 11 , 17 - - 0.11 UI