CS61304A データシートの表示（PDF） - Cirrus Logic
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CS61304A Datasheet PDF : 32 Pages
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CS61304A
CS61304A
ANALOG SPECIFICATIONS (TA = -40°C to 85°C; TV+, RV+ = 5.0V ±5%; GND = 0V)
Parameter
Min
Typ
Max
Units
Transmitter
AMI Output Pulse Amplitudes
E1, 75 Ω
E1, 120 Ω
T1, FCC Part 68
T1, DSX-1
(Note 10)
(Note 11)
(Note 12)
(Note 13)
(Note 14)
E1 Zero (space) level (LEN2/1/0 = 0/0/0)
1:1 transformer and 75Ω load
1:1.26 transformer and 120Ω load
Load Presented To Transmitter Output
(Note 10)
Jitter Added by the Transmitter
10Hz - 8kHz
8kHz - 40kHz
10Hz - 40kHz
Broad Band
(Note 15)
Power in 2kHz band about 772kHz
(Notes 10, 16)
2.14
2.7
2.7
2.4
-0.237
-0.3
-
-
-
-
-
12.6
2.37
3.0
3.0
3.0
-
-
75
-
-
-
-
15
2.6
3.3
3.3
3.6
0.237
0.3
-
0.01
0.025
0.025
0.05
17.9
V
V
V
V
V
V
Ω
UI
UI
UI
UI
dBm
Power in 2kHz band about 1.544MHz
(Notes 10, 16)
-29
-38
(referenced to power in 2kHz band at 772kHz)
-
dB
Positive to Negative Pulse Imbalance
(Notes 10, 16)
T1, DSX-1
-
E1 amplitude at center of pulse
-5
E1 pulse width at 50% of nominal amplitude
-5
0.2
0.5
dB
-
5
%
-
5
%
E1 Transmitter Return Loss
(Notes 10, 16, 17)
51 kHz to 102 kHz
102 kHz to 2.048 MHz
2.048 MHz to 3.072 MHz
20
28
20
28
20
24
-
dB
-
dB
-
dB
E1 Transmitter Short Circuit Current
(Notes 10, 18)
-
-
50
mA RMS
Notes: 10. Using a 0.47 µF capacitor in series with the primary of a transformer recommended
in the Applications Section.
11. Pulse amplitude measured at the output of a 1:1 transformer across a 75 Ω load for
line length setting LEN2/1/0 = 0/0/0.
12. Pulse amplitude measured at the output of a 1:1.26 transformer across a 120 Ω load for line length
setting LEN2/1/0 = 0/0/0 or at the output of a 1:1 transformer across a 120 Ω load for LEN2/1/0=0/0/1.
13. Pulse amplitude measured at the output of a 1:1.15 transformer across a 100 Ω load for
line length setting LEN2/1/0 = 0/1/0.
14. Pulse amplitude measured at the DSX-1 Cross-Connect across a 100 Ω load for all line length
settings from LEN2/1/0 = 0/1/1 to LEN2/1/0 = 1/1/1 using a 1:1.5 transformer.
15. Input signal to RTIP/RRING is jitter free. Values will reduce slightly if jitter free clock is input to TCLK.
16. Not production tested. Parameters guaranteed by design and characterization.
17. Return loss = 20 log10 ABS((z1 +z0)/(z1-z0)) where z1 = impedance of the transmitter, and
z0 = impedance of line load. Measured with a repeating 1010 data pattern with LEN2/1/0 = 0/0/0
and a 1:2 transformer with two 9.4 Ω series resistors terminated by a 75Ω load,
or for LEN2/1/0 = 0/0/1 with a 1:2 transformer and two 15 Ω series resistors terminated by a
120Ω load.
18. Measured broadband through a 0.5 Ω resistor across the secondary of the transmitter transformer
during the transmission of an all ones data pattern for LEN2/1/0 = 0/0/0 or 0/0/1with a 1:2 transformer
and the series resistors specified in Table A1.
DS156PFP1 2
33
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