Instruction Manual

MAX3942
10Gbps Modulator Driver
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
EE
= -5.5V to -4.9V, T
A
= -40°C to +85°C. Typical values are at V
EE
= -5.2V, I
MOD
= 100mA, and T
A
= +25°C, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Off Current
MODEN = V
EE
, MODSET = V
EE
, DATA+ =
high, DATA- = low
1.6 mA
Differential Output Return Loss RL
OUT
I
MOD
= 50mA ≤ 10GHz 10 dB
Output Edge Speed 20% to 80% (Notes 6, 8) 23 32 ps
Setup/Hold Time t
SU
, t
HD
Figure 2 (Note 6) 25 ps
Pulse-Width Adjustment Range (Notes 6, 8) ±30 ±50 ps
Pulse-Width Control Input Range
(Single Ended)
For PWC+ and PWC-
V
EE
+
0.5
V
EE
+
1.5
V
Pulse-Width Control Input Range
(Differential)
(PWC+) - (PWC-) -0.5 +0.5 V
Output Overshoot δ (Notes 6, 8) 5 %
Driver Random Jitter RJ
DR
(Note 6) 0.3 0.8 ps
RMS
Driver Deterministic Jitter DJ
DR
PWC- = GND (Notes 6, 9) 8 13 ps
P-P
CONTROL INPUTS
Input High Voltage V
IH
(Note 10)
V
EE
+
2.0
V
Input Low Voltage V
IL
(Note 10)
V
EE
+
0.8
V
Input Current (Note 10) -80 +200 µA
Note 1: Supply current remains elevated once the retiming function has been enabled. Power must be cycled to reduce supply
current after the retiming function has been disabled.
Note 2: Power-supply noise rejection is specified as PSNR = 20Log(V
noise (on Vcc)
/ ∆V
OUT
). V
OUT
is the voltage across a 50Ω load.
V
noise (on Vcc)
= 100mV
P-P
.
Note 3: For DATA+, DATA-, CLK+, and CLK-.
Note 4: CLK input characterized at 10.7Gbps.
Note 5: Minimum voltage on OUT+ and OUT- is V
EE
+ 1.9V.
Note 6: Guaranteed by design and characterization using the circuit shown in Figure 3.
Note 7: R
MODEQV
= (V
MODSET
- V
EE
) / (I
MOD
- 37mA).
Note 8: 50Ω load, characterized at 10.7Gbps with a 1111 1111 0000 0000 pattern.
Note 9: Deterministic jitter is defined as the arithmetic sum of PWD (pulse-width distortion) and PDJ (pattern-dependent jitter).
Measured with a 10.7Gbps 2
7
- 1 PRBS pattern with 80 zeros and 80 ones inserted in the data pattern.
Note 10: For MODEN and PLRT.