Datasheet

MAX3800
3.2Gbps Adaptive Equalizer
and Cable Driver
_______________________________________________________________________________________ 5
EQUALIZER INPUT AFTER
115FT OF CABLE (TOP)
EQUALIZER OUTPUT (BOTTOM)
MAX3800 toc10
EQUALIZER OUTPUT EYE DIAGRAM
AFTER 115FT OF 50Ω GORE 89 CABLE
(DIFFERENTIAL, 2
7
-1 PRBS)
MAX3800 toc11
60ps/div (2.5Gbps)
EQUALIZER OUTPUT EYE DIAGRAM
AFTER 100FT OF 75Ω RG179 CABLE
(SINGLE-ENDED, 2
7
-1 PRBS)
MAX3800 toc12
68ps/div (2.5Gbps)
EQUALIZER OUTPUT EYE DIAGRAM
AFTER 100FT OF BELDEN 9207 CABLE
(DIFFERENTIAL, 2
7
-1 PRBS)
MAX3800 toc13
60ps/div (2.5Gbps)
60ps/div (2.5Gbps)
EQUALIZER OUTPUT EYE DIAGRAM
AFTER 50FT OF MADISON #14887
SHIELDED TWISTED PAIR CABLE
(DIFFERENTIAL, 2
7
-1 PRBS)
MAX3800 toc14
1.2
1.5
1.4
1.3
1.6
1.7
1.8
0403010 20 50 60 70 80 90 100
CIM VOLTAGE vs. CABLE LENGTH
(RG179B 75Ω COAXIAL CABLE -
SINGLE-ENDED)
MAX3800 toc15
CABLE LENGTH (FEET)
CIM VOLTAGE (V)
CIM-
CIM+
-50
-30
-40
-10
-20
10
0
20
40
30
50
0 0.8 1.2 1.60.4 2.0 2.4 2.8 3.63.2 4.0
EQUALIZER INPUT RETURN LOSS (S11)
MAX3800 toc16
FREQUENCY (GHz)
GAIN (dB)
-50
-30
-40
-10
-20
10
0
20
40
30
50
0 0.8 1.2 1.60.4 2.0 2.4 2.8 3.63.2 4.0
EQUALIZER OUTPUT RETURN LOSS (S22)
MAX3800 toc17
FREQUENCY (GHz)
GAIN (dB)
Typical Operating Characteristics (continued)
(T
A
= +25°C, V
CC
= +3.3V, all jitter measurements done at 3.2Gbps, 700mV cable input with 2
13
-1 PRBS pattern with 100 consecutive
ones and 100 consecutive zeros substituted. Note: Test pattern produces near worst-case jitter results. Results will vary with pattern,
unless otherwise noted.)