Datasheet

155Mbps to 2.5Gbps Burst-Mode Laser Driver
Maxim Integrated 7
MAX3643
Typical Operating Characteristics (continued)
(Typical values are at V
CC
= 3.3V, T
A
= +25°C, data pattern = 2
7
-1 PRBS + 80 ones + 2
7
-1 PRBS + 80 zeros, unless otherwise
noted.)
I
BIAS
vs. VBSET
(R
BIASSET
= 1kΩ)
MAX3643 toc13
VBSET (V)
I
BIAS
(mA)
0.6 0.80.2
0.4
10
20
30
40
50
60
70
80
90
0
0 1.0
TIMING DIAGRAM, BURST-ON
(933MHz FILTER ON OUT+)
MAX3643 toc15
500ps/div
V
OUT+
V
BIAS+
V
BEN+
I
BIAS
+ I
MOD
CURRENT
THRESHOLD vs. R
IMAX
MAX3643 toc14
R
IMAX
(kΩ)
CURRENT THRESHOLD (mA)
25205 10 15
20
40
60
80
100
120
140
160
0
030
TIMING DIAGRAM, BURST-OFF
(933MHz FILTER ON OUT+)
MAX3643 toc16
500ps/div
V
OUT+
V
BIAS+
V
BEN+
SAMPLE/HOLD
(10MΩ LOAD, 2.8μs SAMPLE
AND 100μs HOLD, MDIN = 1.56V)
MAX3643 toc17
20μs/div
MDOUT
1.56V
1.22V
BEN+