Cirrus Logic CS61584A - Manual (Page 6)

CS61584A
6 DS261PP5
DS261PP5
ANALOG CHARACTERISTICS
(T
A
= -40 to 85 °C; power supply pins within ±5% of nominal.)
Notes: 7. For input amplitude of 1.2 V
pk
to 4.14 V
pk
.
8. For input amplitude of 0.5 V
pk
to 1.2 V
pk
, and 4.14 V
pk
to 5.0 V
pk
.
9. For input amplitude of 1.07 V
pk
to 4.14 V
pk
.
10. For input amplitude of 4.14 V
pk
to 5.0 V
pk
.
11. Jitter tolerance increases at lower frequencies. Refer to the Receiver section.
12. Not production tested. Parameters guaranteed by design and characterization.
13. Typical performance using the line interface circuitry recommended in the Applications section.
14. Return loss = 20 log
10
ABS((z
1
+ z
0
) / (z
1
- z
0
)) where z
1
= impedance of the transmitter or receiver, and
z
0
= cable impedance.
15. Attenuation measured with sinusoidal input jitter 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. The jitter attenuator -3 dB knee in T1 mode is
selectable for 4.0 Hz or 1.25 Hz. Refer to the Jitter Attenuator section.
Parameter Symbol Min Typ Max Unit
Receiver
RTIP/RRING Differential Input Impedance - 20 - k
Ω
Sensitivity Below DSX-1 (0 dB = 2.4 V) - -13.6 - dB
Loss of Signal Threshold - 0.3 - V
Data Decision Threshold T1, DSX-1 (Note 7)
(Note 8)
T1, FCC Part 68 and E1 (Note
9)
(Note 10)
60
55
45
40 65
-
50
-
70
75
55
60 % of
Peak
Allowable Consecutive Zeros before LOS 160 175 190 bits
Receiver Input Jitter Tolerance (DSX-1, E1)
10 Hz and below (Note 11)
2 kHz
10 kHz - 100 kHz
300
6.0
0.4
-
-
- -
-
-
UI
Receiver Return Loss (Notes 12, 13, and 14)
51 kHz - 102 kHz
102 kHz - 2.048 MHz
2.048 MHz - 3.072 MHz 12
18
14 22
24
22 -
-
-
dB
Jitter Attenuator
Jitter Attenuator Corner Frequency
T1 (Notes 12 and 15)
E1
1.25
-
4.0
1.25
-
-
Hz
Attenuation at 10 kHz Jitter Frequency (Notes 12 and 15) - 60 - dB
Attenuator Input Jitter Tolerance (Note 12)
(Before Onset of FIFO Overflow or Underflow Protection)
28 43 - UI
pk-pk
Transmitter
Arbitrary Pulse Amplitude at Transformer Secondary
T1, DSX-1
T1, DS1
E1, 75
Ω
E1, 120
Ω
-
-
-
- 73
52
43
52 -
-
-
-
mV/LS
B
CS61584A
6 DS261F1