2.7Gbps Laser Driver with Modulation
Compensation
MAX863
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.15V to +3.6V, T = -40°C to +85°C. Typical values are at V
= +3.3V, I
= 50mA, I = 40mA, T = +25°C, unless
MOD A
A
CC
BIAS
otherwise noted.) (Notes 1, 9)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX UNITS
At high
At low
V
CC
Single-Ended Input (DC-Coupled)
Single-Ended Input (AC-Coupled)
V
V
IS
IS
ID
V
- 1.0
V
- 0.1
CC
CC
V
+
V
+
-
CC
CC
0.4
At high
At low
0.05
V
V
V
-
V
CC
CC
0.4
0.05
DC-coupled
AC-coupled
NRZ (Note 3)
0.2
0.2
2.0
1.6
Differential Input Swing
Input Data Rate
V
V
P-P
3.2
17
14
Gbps
dB
f ≤ 2.7GHz
2.7GHz < f ≤ 4GHz
Input Return Loss
RL
(Notes 3, 5)
IN
Turn-Off Delay from EN
Setup Time
EN = high (Note 3)
Figure 2 (Note 3)
Figure 2 (Note 3)
1.0
µs
ps
ps
ps
ps
t
90
SU
Hold Time
t
90
HD
Pulse-Width Adjustment Range
Pulse-Width Stability
Z = 25Ω (Notes 3, 6)
L
185
220
PWC+ and PWC- open (Notes 3, 6)
18.5
1.0
Differential Pulse-Width Control
Input Range
For PWC+ and PWC- (Notes 3, 7), V = 0.5V
-1.0
V
V
CM
Differential Mark Density
0% to 100%, V + - V
-
MK
0.85
MK
Differential Mark-Density Voltage
to Mark-Density Ratio
15.5
V/%
Output Edge Speed
Output Overshoot
Random Jitter
t , t
R
Z = 25Ω (20% to 80%) (Notes 3, 6)
50
7
85
ps
%
F
L
δ
Z = 25Ω (Note 3)
L
(Notes 3, 6)
0.8
8
1.3
40
40
ps
RMS
Data Rate = 2.7Gbps (Notes 3, 8)
Data Rate = 3.2Gbps (Notes 3, 8)
Deterministic Jitter
ps
P-P
10
Note 1: Specifications at -40°C are guaranteed by design and characterization.
Note 2: Excluding I , I , I , I , I , and I . Input clock and data are AC-coupled.
BIAS MOD BIASMON MODMON FAIL
PWC
Note 3: Guaranteed by design and characterization.
Note 4: An external capacitor at APCFILT1 and APCFILT2 is used to set the time constant.
Note 5: For both data inputs DATA+, DATA- and clock inputs CLK+, CLK-.
Note 6: Measured using a 2.7Gbps repeating 0000 0000 1111 1111 pattern.
Note 7: For pulse width, PW = 100%: Rp = Rn = 500Ω (or open) or PWC+ = PWC- ≈ +0.5V. For PW > 100%: Rp > Rn or PWC+ >
PWC-. For PW < 100%: Rp < Rn or PWC+ < PWC-.
Note 8: Measured using a 213 - 1 PRBS with 80 zeros + 80 ones input data pattern or equivalent.
Note 9: AC characterization performed using the circuit in Figure 1.
Note 10: Power-Supply Noise Rejection (PSNR) = 20log (V
/ΔV
). V
is the voltage across the 25Ω load when no
10 NOISE (on VCC)
OUT
OUT
input is applied.
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