Instruction Manual

MAX3942
10Gbps Modulator Driver
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Supply Voltage V
EE
..............................................-6.0V to +0.5V
Voltage at MODEN,
RTEN, PLRT, MODSET............................(V
EE
- 0.5V) to +0.5V
Voltage at DATA+, DATA-, CLK+, and CLK-……-1.65V to +0.5V
Voltage at OUT+, OUT- ................................……….-4V to +0.5V
Voltage at PWC+, PWC- ...................(V
EE
- 0.5V) to (V
EE
+ 1.7V)
Continuous Power Dissipation (T
A
= +85°C)
24-Pin Thin QFN (derate 20.8mW/° above +85°C) ....1354mW
Current into or out of OUT+, OUT-.................……………...80mA
Storage Temperature Range .....................……-55°C to +150°C
Operating Temperature Range ....................……-40°C to +85°C
Lead Temperature (soldering, 10s)............………………+300°C
ELECTRICAL CHARACTERISTICS
(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
Power-Supply Voltage V
EE
-5.5 -4.9 V
Retime disabled 125 175
Supply Current I
EE
Excluding I
MOD
(Note 1)
Retime enabled 140 200
mA
Power-Supply Noise Rejection PSNR f ≤ 2MHz (Note 2); see Figure 3 15 dB
SIGNAL INPUT (Note 3)
Input Data Rates NRZ 10.7 Gbps
Single-Ended Input Resistance R
IN
Input to GND 42.5 50 58.5 Ω
DC-coupled, Figure 1a -1 0
Single-Ended Input Voltage V
IS
AC-coupled, Figure 1b -0.4 +0.4
V
DC-coupled (Note 4) 0.2 2.0
Differential Input Voltage V
ID
AC-coupled (Note 4) 0.2 1.6
V
P-P
Differential Input Return Loss RL
IN
≤ 15GHz 15 dB
MODULATION (Note 5)
Maximum Modulation Current 112 120 mA
P-P
Minimum Modulation Current V
MODSET
= V
EE
37 40 mA
P-P
MODSET Voltage Range V
MODSET
V
EE
V
EE
+ 1 V
E q ui val ent M od ul ati on Resi stance R
MODEQV
(Note 7) 11.1 Ω
Modulation Set Bandwidth Modulation depth 10%, 50Ω driver load 5 MHz
MODSET Input Resistance 20 kΩ
Modulation-Current Temperature
Stability
(Note 6) -980 0 ppm/°C
Modulation-Current-Setting Error 50Ω driver load, T
A
= +25°C -10 +10 %
Output Resistance R
OUT
OUT+ and OUT- to GND 42.5 50 58.5 Ω