Datasheet

MAX3980
3.125Gbps XAUI Quad Equalizer
4 _______________________________________________________________________________________
Typical Operating Characteristics
(V
CC
= +3.3V, 3.125Gbps, 500mVp-p board input with 2
7
- 1 PRBS, T
A
= +25°C, unless otherwise noted.)
50mV/
div
50ps/div
EQUALIZER INPUT EYE DIAGRAM
BEFORE EQUALIZATION
(40in FR-4 6mil STRIPLINE)
MAX3980 toc01
100mV/
div
50ps/div
EQUALIZER OUTPUT EYE DIAGRAM
AFTER EQUALIZATION
(40in FR-4 6mil STRIPLINE)
MAX3980 toc02
100mV/
div
50ps/div
EQUALIZER OUTPUT EYE DIAGRAM
(20in BACKPLANE WITH TWO TERADYNE HSD
CONNECTORS AND 3in DAUGHTERBOARD)
MAX3980 toc03
-50
-30
-40
-10
-20
0
10
50
INPUT RETURN GAIN (S11, DIFFERENTIAL,
INPUT SIGNAL = -60dBm,
DEVICE POWERED OFF)
MAX3980 toc04
FREQUENCY (MHz)
GAIN (dB)
20501050 3050 4050 5050
0
35
30
25
20
15
10
5
40
EQUALIZER DETERMINISTIC JITTER
vs. LENGTH
(FR-4 6mil STRIPLINE, K28.5 PATTERN)
MAX3980 toc05
LENGTH (in)
JITTER (ps)
0203010
40
50
200
250
300
350
400
450
500
02010 30 40 50 60 70 80 90
EQUALIZER LATENCY
vs. TEMPERATURE
MAX3980 toc06
TEMPERATURE (°C)
DELAY (ps)
70
50
130
110
90
170
190
150
210
0304010 20 50 60 70 80
EQUALIZER OPERATING
CURRENT vs. TEMPERATURE
MAX3980 toc07
TEMPERATURE (°C)
CURRENT (mA)
NORMAL OPERATION
(EN = TTL HIGH)
STANDBY POWER
(EN = TTL LOW)