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MAX3668 Datasheet(PDF) 3 Page - Maxim Integrated Products

Part No. MAX3668
Description  3.3V, 622Mbps SDH/SONET Laser Driver with Automatic Power Control
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
Logo MAXIM - Maxim Integrated Products

MAX3668 Datasheet(HTML) 3 Page - Maxim Integrated Products

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+3.3V, 622Mbps SDH/SONET
Laser Driver with Automatic Power Control
_______________________________________________________________________________________
3
AC ELECTRICAL CHARACTERISTICS
(VCC = +3.14V to +5.5V, load as shown in Figure 2, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = +3.3V,
TA = +25°C.) (Note 6)
Note 1: Characteristics at -40°C are guaranteed by design and characterization. Dice are tested at TA = +25°C only.
Note 2: Tested with RMODSET = 5.11k
Ω (IMOD ≈ 38mA), RBIASMAX = 4.56kΩ (IBIAS ≈ 52mA), excluding IBIAS and IMOD.
Note 3: Both the bias and modulation currents will be disabled if any of the current set pins are shorted to ground.
Note 4: This assumes that the laser to monitor diode transfer function does not change with temperature.
Note 5: See Typical Operating Characteristics for worst-case distributions.
Note 6: AC characteristics are guaranteed by design and characterization.
Note 7: Total IMOD out of OUT+. Refer to the Design Procedure for information regarding current delivered to the laser.
Note 8: Input signal is a 622Mbps, 2
13- 1 PRBS with 80 inserted zeros.
Note 9: Input signal is a 622Mbps, 11110000 pattern.
Note 10:PWD = (wider pulse – narrower pulse) / 2.
IMOD = 75mA
ENABLE = low (Note 3)
(Note 7)
Open loop
20% to 80%,
RL = 10
|| 20Ω load
CONDITIONS
ppm/°C
-620
175
620
Modulation Current Stability
µA
200
mA
575
IMOD
Modulation Current Range
Modulation Off Current
ns
250
Enable/Start-Up Delay
ps
70
155
Pulse-Width Distortion
(peak-to-peak)
%
-15
15
Modulation Current Absolute
Accuracy
100
200
tR/tF
Output Rise/Fall Time
ps
230
375
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
(Notes 9, 10)
IMOD = 5mA
DATA+
DATA-
(DATA+) -
(DATA-)
IOUT+
100mV MIN
800mV MAX
200mVp-p MIN
1600mVp-p MAX
IMOD
Figure 1. Required Input Signal and Output Polarity
IMOD = 5mA (Note 5)
300
VCC
15
10
1.0
µF
1.0
µF
12.4
20
OUT-
OUT+
BIAS
20
50
OSCILLOSCOPE
MAX3668
VCC
Figure 2. Output Termination for Characterization
(Note 8)
ps
100
Jitter Generation (peak-to-peak)
IMOD = 75mA
IMOD = 5mA
Bits
80
CID
Maximum Consecutive Identical
Digits at 622Mbps
IMOD = 75mA
10
135


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