Cirrus Logic CS61880 - Manual (Page 55)

CS61880
DS450PP3 55
19.5 Receiver Analog Characteristics
(TA = -40
°
C to 85
°
C; TV+, RV+ = 3.3 V
±
5%; GND = 0 V))
Notes: 10. Parameters guaranteed by design and characterization.
11. Using components on the CDB61880 evaluation board in Internal Match Impedance Mode.
12. Return loss = 20log10 ABS((Z1 + Z0) / (Z1 - Z0)) where Z1 - impedance of the transmitter or receiver,
and Z0 = cable impedance.
13. Assuming that jitter free clock is input to TCLK.
14. Jitter tolerance for 6 dB input signal levels. Jitter tolerance increases at lower frequencies. HDB3 coders
enabled.
15. In Data Recovery Mode.
16. Jitter Attenuator in the receive path.
Parameter Min. Typ Max Units
Allowable Cable Attenuation @ 1024 kHz - - - 12 dB
RTIP/RRING Input Impedance E1 120
Ω
Load
(Internal Line matching mode) E1 75
Ω
Load
Note 10
-
- 13k
50
-
-
Ω
RTIP/RRING Input Impedance E1 120
Ω
Load
(External Line matching mode) E1 75
Ω
Load
Note 10
-
- 13k
13k -
-
Ω
Receiver Dynamic Range 0.5 - - Vp
Signal to Noise margin (Per G.703, O151 @ 6 dB cable Atten). - -18 - dB
Receiver Squelch Level 150 mV
LOS Threshold - 200 - mV
LOS Hysteresis 50 mV
Data Decision Threshold
Note
10
41 50 59 % of
peak
Input Jitter Tolerance 1 Hz - 1.8 Hz
Notes 10 , 14 , 16 20 Hz - 2.4 kHz
18 kHz - 100 kHz
18
1.5
0.2
-
-
- -
-
- UI
Input Return Loss 51 kHz - 102 kHz
102 kHz - 2048 kHz
Notes 10 , 11 , 12 2048 kHz - 3072 kHz
-18
-18
-18 -28
-30
-27 -
-
- dB