CS61881-IB Просмотр технического описания (PDF) - Cirrus Logic
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CS61881-IB Datasheet PDF : 28 Pages
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CS61881
ANALOG SPECIFICATIONS (TA = -40°C to 85°C; TVCC, RVCC = 3.3V ±5%; GND = 0 V)
Parameter
Min
Typ
Max
Units
Transmitter
Output Pulse Amplitudes
75Ω (Note 8)
120Ω (Note 9)
Positive to Negative Pulse Imbalance
(Notes 8, 9, 11)
Amplitude at center of pulse
Width at 50% of nominal amplitude
Transmit Return Loss - 75Ω Coaxial
(Note 11,12)
51kHz to 102kHz
102kHz to 2048kHz
2048kHz to 3072kHz
Transmit Return Loss - 120Ω Twisted Pair
(Note 11,12)
51kHz to 102kHz
102kHz to 2048kHz
2048kHz to 3072kHz
Transmitter Short Circuit Current
(Notes 11)
Transmit Intrinsic Jitter; 20Hz to 100kHz
(Notes 10,11)
Receiver
RTIP/RRING Input Impedance 120Ω Load, CBLSEL open
75Ω Load, CBLSEL High or Low
Receiver Dynamic Range
Signal to Noise margin (Per G.703, O.151 @ 6dB cable Atten.)
Receiver Squelch Level
LOS Threshold
LOS Hysteresis
Data Decision Threshold
Input Return Loss
(Notes 11, 12)
20kHz to 51kHz
51 kHz - 102 kHz
102 kHz - 2048 kHz
2048 kHz - 3072 kHz
LOS occurrence to ALOS asserted delay
LOS Reset
2.14
2.7
-5
-5
17
17
17
17
17
17
-
-
-
0.5
18
-
43
20
20
20
14
10
2.37
3.0
-
-
-
-
-
-
-
-
-
TBD
40k
40k
-
-
150
200
50
50
-
-
-
-
30
-
2.6
3.3
5
5
-
-
-
-
-
-
50
TBD
-
-
-
-
57
-
-
-
-
255
V
V
%
%
dB
dB
mA RMS
UI
Ω
Vp
dB
mV
mV
mV
% of peak
dB
dB
dB
dB
µS
Marks
Notes: 8. Pulse amplitude measured at the output of the transformer across a 75 Ω load.
9. Pulse amplitude measured at the output of the transformer across a 120 Ω load.
10. Assuming that jitter free clock is input to TCLK.
11. Not production tested. Parameters guaranteed by design and characterization.
12. Using components in CDB61881 evaluation board
6
DS451PP3
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