CS61880 datasheet(56/70 Pages) CIRRUS

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CS61880

DS450PP3

19.6 Jitter Attenuator Characteristics

(TA = -40

° C to 85° C; TV+, RV+ = 3.3 V ±5%; GND = 0 V)

Notes: 17. 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.

18. Measurement is not effected by the position of the Jitter Attenuator.

Parameter

Min.

Typ

Max

Units

Jitter Attenuator Corner Frequency

Note 10, 18

(Depends on JACF Bit in host mode)

1.25

2.50

E1 Jitter Attenuation

3 Hz to 40 Hz

Note 10, 17

400 Hz to 100 kHz

+ 0.5

-19.5

Attenuator Input Jitter Tolerance before FIFO

32-bit FIFO

over flow and under flow

Note 10

64-bit FIFO

Delay through Jitter Attenuator Only

32-bit FIFO

Note 10

64-bit FIFO

Intrinsic Jitter in Remote Loopback

Notes 10, 16

0.11

110

100

10K

Frequency in Hz

+ 0.5

1.4K

400

+ 10

- 10

- 20

- 30

- 50

- 40

- 60

- 19.5

- 6

- 70

100K

ITU G.736

TYP. E1 @ 1.25 Hz CF

TYP. E1 @ 2.5 Hz CF

Figure 18. Jitter Transfer Characteristic vs. G.736 & TBR 12/13

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