AK61584 Datasheet, PDF (5/38 Pages) Asahi Kasei Microsystems – Dual Low Power T1/E1 Line Interface

ASAHI KASEI
[AK61584]
ANALOG SPECIFICATIONS (TA=-40 to 85^oC;power supply pins within +/-5% of nominal)
Parameter
Min
Typ
Max Units
Transmitter
AMI Output Pulse Amplitudes
(Note 16)
E1,75ohm
(Note 17) 2.14 2.37
2.6
V0p
E1,120ohm
(Note 18) 2.7
3.0
3.3
V0p
T1,DSX-1
(Note 19)
2.4
3.0
3.6
V0p
Recommended Transmitter Output Load
(Note 16)
T1,
-
25
-
ohm
E1,75ohm
-
43
-
ohm
E1,120ohm
-
68.9
-
ohm
Jitter Added
by the Transmitter 8kHz – 40kHz
-
0.013
-
UIpp
10Hz – 40kHz
-
0.016
-
UIpp
Broad Band
(Note 20)
-
0.027
-
UIpp
Power in 2 kHz band about 772 kHz
(Notes 14 and 21)
12.6
15
17.9 dBm
(DSX-1 only)
Power in 2 kHz band about 1.544 MHz
(Notes 14 and 21)
-29
-38
-
dB
(referenced to power in 2 kHz band at 772 kHz) (DSX-1 only)
Positive to Negative Pulse Imbalance
(Notes 14 and 21)
T1,DSX-1
-
0.2
0.5 dB
E1,amplitude at center of pulse interval
-5
-
+5
%
E1,width at 50% of nominal amplitude
-5
-
+5
%
Transmitter Return Loss
(Notes 14, 21, and 22)
51 kHz - 102 kHz
8
-
-
dB
102 kHz - 2.048 MHz
14
-
-
dB
2.048 MHz - 3.072 MHz
10
-
-
dB
E1 Short Circuit Current
(Note 23)
-
-
50 mArms
E1 and DSX-1 Output Pulse Rise/Fall Times
(Note 24)
-
25
-
ns
E1 Pulse Width (at 50% of peak amplitude)
-
244
-
ns
E1 Pulse Amplitude E1, 75ohm
-0.237
-
0.237 V0p
for a space
E1,120ohm
-0.3
-
0.3
V0p
Notes: 16. Using a transformer that meets the specifications in Table 2.
17. Measured across 75ohm at the output of the transmit transformer for CON2/1/0=0/0/0.
18. Measured across 120ohm at the output of the transmit transformer for CON2/1/0=0/0/1.
19. Measured at the DSX-1 Cross-Connect for line length settings CON2/1/0=0/1/0, 0/1/1,
1/0/0, 1/0/1, and 1/1/0 after the length of #22 ABAM cable specified in Table 1.
20. Input signal to TCLK is jitter free.
21. Typical performance with a 0.47 uF capacitor in series with primary of transmitter output transformer.
22. Return loss = 20 log ₁₀ ABS ((z1+z0)/(z1-z0)) where z1 = impedance of the transmitter, and
Z₀=cable impedance.
23. Transformer secondaries shorted with 0.5ohm resistor.
24. At transformer secondary. From 10% to 90% of amplitude.
0185-E-00
-5-
‘98/04