Manual

MAX3795
1Gbps to 4.25Gbps Multirate VCSEL Driver
with Diagnostic Monitors
6 _______________________________________________________________________________________
BIAS CURRENT vs. R
BIASSET
MAX3795 toc10
R
BIASSET
(Ω)
BIAS CURRENT (mA)
10
1
10
100
0.1
1 100
MODULATION CURRENT vs. R
MODSET
MAX3740A toc11
R
MODSET
(kΩ)
MODULATION CURRENT (mA
P-P
)
10
10
100
1
10010.1
MODULATION CURRENT TEMPCO
vs. R
TC
MAX3795 toc17
R
TC
(Ω)
TEMPCO (ppm/°C)
100k10k1k
500
1500
2500
3500
4500
5500
-500
100 1M
REFERENCED TO +25°C
MONITOR DIODE CURRENT
vs. R
PWRSET
MAX3795 toc12
R
PWRSET
(Ω)
MONITOR DIODE CURRENT (A)
1
10µ
100µ
1m
10m
1µ
010
SUPPLY CURRENT vs. TEMPERATURE
MAX3795 toc13
TEMPERATURE (
°
C)
SUPPLY CURRENT (mA)
603510-15
20
30
40
50
60
70
80
90
100
-40 85
I
MOD
= 2mA
I
MOD
= 15mA
INPUT RETURN LOSS
MAX3795 toc14
FREQUENCY (Hz)
S
11
(dB)
1G
-30
-25
-20
-15
-10
-5
0
-35
100 10G
DIFFERENTIAL
MEASUREMENT
AT IN±
OUTPUT RETURN LOSS
MAX3795 toc15
FREQUENCY (Hz)
S
22
(dB)
1G
-40
-35
-30
-25
-20
-15
-10
-5
0
-45
100 10G
SINGLE-ENDED
MEASUREMENT
MODULATION CURRENT
vs. TEMPERATURE
MAX3795 toc16
TEMPERATURE (°C)
MODULATION CURRENT (mA
P-P
)
8070605040302010
5
6
7
8
9
10
11
4
090
R
MODSET
= 1.8kΩ
R
TC
= 1kΩ
R
TC
= 500kΩ
R
TC
= 100kΩ
R
TC
= 60kΩ
R
TC
= 10kΩ
R
TC
= 5kΩ
R
TC
= 100Ω
Typical Operating Characteristics (continued)
(V
CC
= +3.3V, R
TC
= 0Ω, PEAKSET open, measured electrically with a 50Ω load AC-coupled to OUT+, T
A
= +25°C, unless otherwise
noted.)