MAX3981 Ver la hoja de datos (PDF) - Maxim Integrated
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MAX3981 Datasheet PDF : 9 Pages
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3.125Gbps XAUI Quad Cable Equalizer
Typical Operating Characteristics
(VCC = +3.3V, 3.125Gbps, 500mVp-p cable input with 27 - 1 PRBS, TA = +25°C, unless otherwise noted. Note: Twin-axial cable
used was Tensolite, Z-Skew, 100Ω, 28AWG. Shielded twisted pair used was Madison 100Ω, 30AWG, spec #14887.)
EQUALIZER INPUT EYE DIAGRAM
AFTER 10m (33ft) OF TWIN-AXIAL CABLE
EQUALIZER OUTPUT EYE DIAGRAM
AFTER 10m (33ft) OF TWIN-AXIAL CABLE
EQUALIZER OPERATING
CURRENT vs. TEMPERATURE
100mV/
div
100mV/
div
50ps/div
EQUALIZER INPUT EYE DIAGRAM AFTER
5m (16ft) OF SHIELDED TWISTED PAIR
50ps/div
EQUALIZER OUTPUT EYE DIAGRAM AFTER
5m (16ft) OF SHIELDED TWISTED PAIR
210
NORMAL OPERATION
190
(EN = TTL HIGH)
170
150
130
110
90
STANDBY POWER
70
(EN = TTL LOW)
50
0 10 20 30 40 50 60 70 80
TEMPERATURE (°C)
INPUT RETURN GAIN
(S11, DIFFERENTIAL, INPUT
SIGNAL = -60dBm, DEVICE POWERED OFF)
10
0
-10
60mV/
100mV/
-20
div
div
-30
-40
50ps/div
EQUALIZER DETERMINISTIC JITTER vs.
CABLE LENGTH
(K28.5 PATTERN, 3.125Gbps)
60
50
SHIELDED TWISTED PAIR
40
(MADISON)
50ps/div
EQUALIZER DETERMINISTIC JITTER vs.
CABLE LENGTH
(K28.5 PATTERN, 2.5Gbps)
60
SHIELDED TWISTED PAIR
50
(MADISON)
40
-50
50
500
1050 2050 3050 4050 5050
FREQUENCY (MHz)
EQUALIZER LATENCY
vs. TEMPERATURE
450
400
30
30
350
20
TWIN-AXIAL
20
TWIN-AXIAL
(TENSOLITE)
300
(TENSOLITE)
10
10
250
0
0 1 2 3 4 5 6 7 8 9 10
LENGTH (m)
0
0 1 2 3 4 5 6 7 8 9 10
LENGTH (m)
200
0
10 20 30 40 50 60 70 80 90
TEMPERATURE (°C)
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