MAX3863ETJ+-MAX3863ETJ+T Fast Delivery |IC PHOENIX CO.,LIMITED

MAX3863ETJ+T ,2.7Gbps Laser Driver with Modulation CompensationApplications Pin ConfigurationSONET and SDH Transmission SystemsTOP VIEWWDM Transmission Systems3.2 ..
MAX3866E/D ,2.5Gbps, +3.3V Combined Transimpedance/Limiting AmplifierApplicationsSDH/SONET Transmission SystemsPART TEMP. RANGE PIN-PACKAGEPIN/Preamplifier Receivers MA ..
MAX3867ECM ,+3.3V / 2.5Gbps SDH/SONET Laser Driver with Automatic Power ControlELECTRICAL CHARACTERISTICS(V = +3.14V to +5.5V, T = -40°C to +85°C. Typical values are at V = +3.3V ..
MAX3867ECM ,+3.3V / 2.5Gbps SDH/SONET Laser Driver with Automatic Power ControlApplicationsMAX3867ECM -40°C to +85°C 48 TQFPSONET/SDH Transmission SystemsMAX3867E/D -40°C to +85° ..
MAX3869EHJ+ ,+3.3V, 2.5Gbps SDH/SONET Laser Driver with Current Monitors and APCELECTRICAL CHARACTERISTICS(V = +3.14V to +5.5V, T = -40°C to +85°C. Typical values are at V = +3.3V ..
MAX3869EHJ+ ,+3.3V, 2.5Gbps SDH/SONET Laser Driver with Current Monitors and APCApplicationsMAX3869EGJ -40°C to +85°C 32 QFN*SONET/SDH Transmission SystemsMAX3869E/D -40°C to +85° ..
MAX7414CUA ,5th-Order, Lowpass, Switched-Capacitor FiltersELECTRICAL CHARACTERISTICS—MAX7409/MAX7410(V = +5V, filter output measured at OUT, 10kΩ || 50pF loa ..
MAX7414CUA+T ,5th-Order, Lowpass, Switched-Capacitor FiltersELECTRICAL CHARACTERISTICS—MAX7409/MAX7410(V = +5V, filter output measured at OUT, 10kΩ || 50pF loa ..
MAX7414EUA ,5th-Order, Lowpass, Switched-Capacitor FiltersApplicationsMAX7409CPA 0°C to +70°C 8 Plastic DIPADC Anti-Aliasing CT2 Base StationsMAX7409EUA -40° ..
MAX7414EUA ,5th-Order, Lowpass, Switched-Capacitor FiltersELECTRICAL CHARACTERISTICS—MAX7409/MAX7410(V = +5V, filter output measured at OUT, 10kΩ || 50pF loa ..
MAX7414EUA ,5th-Order, Lowpass, Switched-Capacitor FiltersFeaturesThe MAX7409/MAX7410/MAX7413/MAX7414 5th-order,' 5th-Order Lowpass Filterslowpass, switched- ..
MAX7414EUA+ ,5th-Order, Lowpass, Switched-Capacitor Filtersapplications. They feature a+5V (MAX7409/MAX7410)shutdown mode, which reduces the supply current to ..

MAX3863ETJ+-MAX3863ETJ+T
2.7Gbps Laser Driver with Modulation Compensation
General Description
The MAX3863 is designed for direct modulation of laser
diodes at data rates up to 2.7Gbps. An automatic
power-control (APC) loop is incorporated to maintain a
constant average optical power. Modulation compensa-
tion is available to increase the modulation current in
proportion to the bias current. The optical extinction
ratio is then maintained over temperature and lifetime.
The laser driver can modulate laser diodes at ampli-
tudes up to 80mA. Typical (20% to 80%) edge speeds
are 50ps. The MAX3863 can supply a bias current up
to 100mA. External resistors can set the laser output
levels.
The MAX3863 includes adjustable pulse-width control
to minimize laser pulse-width distortion. The device
offers a failure monitor output to indicate when the APC
loop is unable to maintain the average optical power.
The MAX3863 accepts differential CML clock and data
input signals with on-chip 50Ωtermination resistors. If a
clock signal is available, an input data-retiming latch
can be used to reject input pattern-dependent jitter.
The laser driver is fabricated with Maxim’s in-house
second-generation SiGe process.
Applications
SONET and SDH Transmission Systems
WDM Transmission Systems
3.2Gbps Data Communications
Add/Drop Multiplexers
Digital Cross-Connects
Section Regenerators
Long-Reach Optical Transmitters
FeaturesSingle +3.3V Power Supply58mA Power-Supply Current Up to 2.7Gbps (NRZ) OperationOn-Chip Termination ResistorsAutomatic Power Control (APC)Compensation for Constant Extinction RatioProgrammable Modulation Current Up to 80mAProgrammable Bias Current Up to 100mA50ps Typical Rise/Fall TimePulse-Width Adjustment CircuitSelectable Data-Retiming LatchFailure DetectorMark-Density MonitorCurrent MonitorsESDProtection
MAX3863
2.7Gbps Laser Driver with Modulation
Compensation313029282726
RTENENBIASMAXMODSETMODCOMPV
BIASMON
MODMON111213141516
APCSET
APCFILT1APCFILT2
PWC+PWC-
MK+
MK-
FAIL
*THE EXPOSED PAD MUST BE SOLDERED TO GND ON THE CIRCUIT BOARD.
*EP
BIAS
VCC
MOD
MODN
VCC
VCC
CLK-
CLK+
VCC
VCC
DATA-
DATA+
MAX3863VCC24MDMON
TOP VIEW
TQFN-EP
QFN-EP
Pin Configuration
Ordering Information
19-2281; Rev 4; 11/08
PART TEMP RANGE PIN-PACKAGE
MAX3863ETJ+ -40°C to +85°C 32 TQFN-EP*
MAX3863EGJ -40°C to +85°C 32 QFN-EP*
+Denotes a lead-free/RoHS-compliant package.
*EP = Exposed pad.
MAX3863
2.7Gbps Laser Driver with Modulation
Compensation
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VCC= +3.15V to +3.6V, TA = -40°C to +85°C. Typical values are at VCC= +3.3V, IBIAS= 50mA, IMOD= 40mA, TA= +25°C, unless
otherwise noted.) (Notes 1, 9)
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 VCC...............................................-0.5V to +5.0V
DATA+, DATA- and CLK+, CLK-....(VCC- 1.5V) to (VCC + 0.5V)
RTEN, EN, BIAS, MK+, MK-, PWC+, PWC-
MODMON, BIASMON, MDMON, MODCOMP,
APCFILT1, APCFILT2, BIASMAX, MODSET,
APCSET Voltage......................................-0.5V to (VCC+ 0.5V)
MOD, MODN Voltage.......................................0 to (VCC+ 1.5V)
MOD, MODN Current......................................-20mA to +150mA
BIAS Current...................................................-20mA to +150mA
MD Current............................................................-5mA to +5mA
Operating Junction Temperature Range...........-55°C to +150°C
Storage Temperature Range.............................-55°C to +150°C
Continuous Power Dissipation (TA= +85°C)
32-Pin QFN, TQFN (derate 21.2mW/°C above +85°C)....1.3W
Processing Temperature (die).........................................+400°C
Lead Temperature (soldering, 10s)................................+300°C
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Power-Supply CurrentICC(Note 2)5885mA
Power-Supply Noise RejectionPSNRf = 100kHz, 100mVP-P (Note 10)40dB
Power-Supply ThresholdOutput enabled2.8V
Single-Ended Input ResistanceInput to VCC405060Ω
Bias-Current Setting Range4100mA
APC open loop, IBIAS = 100mA, TA = +25°C-15+15Bias-Current Setting ErrorAPC open loop, IBIAS = 4mA, TA = +25°C-20+20%
Bias Off-CurrentEN high0.1mA
IBIAS to IBIASMON Ratio344046mA/mA
APC open loop, 10mA ≤ IBIAS ≤ 100mA (Note 3)-480+480Bias-Current Temperature StabilityAPC open loop, 4mA ≤ IBIAS ≤ 100mA (Note 3)±390ppm/°C
Modulation-Current Setting Range780mA
Modulation-Current Setting ErrorAPC open loop, 25Ω load, TA = +25°C-15+15%
Modulation Off-CurrentEN high0.1mA
Modulation-Current Temperature
StabilityAPC open loop (Note 3)-480+480ppm/°C
IMOD to IMODMON Ratio384653mA/mA
Modulation Compensation RangeK K = ΔIMODC/ΔIBIAS01.5mA/mA
MD Pin Voltage1.75V
Monitor Photodiode Current
RangeIMD302000µA
APC Loop Time ConstanttAPC(Notes 3, 4)141000µs
APC Open Loop4mA ≤ IBIAS ≤ 10mA (Note 3)±390mA
VMDMON to IMD RatioRMDMON = 4kΩ0.81.01.2mV/µA
EN and RTEN Input HighVIH2.0V
EN and RTEN Input LowVIL0.8V
FAIL Output HighVOH Source 150µA2.4V
FAIL Output LowVOL Sink 2mA0.4V
MAX3863
2.7Gbps Laser Driver with Modulation
Compensation
ELECTRICAL CHARACTERISTICS (continued)
(VCC= +3.15V to +3.6V, TA = -40°C to +85°C. Typical values are at VCC= +3.3V, IBIAS= 50mA, IMOD= 40mA, TA= +25°C, unless
otherwise noted.) (Notes 1, 9)
Note 1:Specifications at -40°C are guaranteed by design and characterization.
Note 2:Excluding IBIAS, IMOD, IBIASMON, IMODMON, IFAIL, and IPWC. Input clock and data are AC-coupled.
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) = 20log10(VNOISE(on VCC)/ΔVOUT). VOUTis the voltage across the 25Ωload when no
input is applied.
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
At highVCCSingle-Ended Input (DC-Coupled)VISAt lowV C C - 1.0V C C - 0.1V
At highVCC +
VCC +
Single-Ended Input (AC-Coupled)VIS
At lowV C C -
0.4C C -
DC-coupled0.22.0Differential Input SwingVIDAC-coupled0.21.6VP-P
Input Data RateNRZ (Note 3)3.2Gbps
f ≤ 2.7GHz17Input Return LossRLIN(Notes 3, 5)2.7GHz < f ≤ 4GHz14dB
Turn-Off Delay from ENEN = high (Note 3)1.0µs
Setup TimetSUFigure 2 (Note 3)90ps
Hold TimetHDFigure 2 (Note 3)90ps
Pulse-Width Adjustment RangeZL = 25Ω (Notes 3, 6)±185±220ps
Pulse-Width StabilityPWC+ and PWC- open (Notes 3, 6)±18.5ps
Differential Pulse-Width Control
Input RangeFor P WC + and P W C - ( N otes 3, 7) , V C M = 0.5V -1.01.0V
Differential Mark Density0% to 100%, VMK+ - VMK-±0.85V
Differential Mark-Density Voltage
to Mark-Density Ratio15.5V/%
Output Edge SpeedtR, tFZL = 25Ω (20% to 80%) (Notes 3, 6)5085ps
Output OvershootδZL = 25Ω (Note 3)±7%
Random Jitter(Notes 3, 6)0.81.3psRMS
Data Rate = 2.7Gbps (Notes 3, 8)840Deterministic JitterData Rate = 3.2Gbps (Notes 3, 8)1040psP-P
MAX3863
2.7Gbps Laser Driver with Modulation
Compensation
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted. See Typical Operating Circuit.)
ELECTRICAL EYE DIAGRAM
(IMOD = 80mA, DATA RATE = 2.7Gbps,
PATTERN 213 - 1 + 80CID)
MAX3863 toc01a
52ps/div
ELECTRICAL EYE DIAGRAM
(IMOD = 80mA, DATA RATE = 3.2Gbps,
PATTERN 213 - 1 + 80CID)
MAX3863 toc01b
52ps/div
ELECTRICAL EYE DIAGRAM
(IMOD = 7mA, DATA RATE = 2.7Gbps,
PATTERN 213 - 1 + 80CID)
MAX3863 toc02a
52ps/div
ELECTRICAL EYE DIAGRAM
(IMOD = 7mA, DATA RATE = 3.2Gbps,
PATTERN 213 - 1 + 80CID)
MAX3863 toc02b
52ps/div
OPTICAL EYE DIAGRAM
(IMOD = 40mA, DATA RATE = 2.5Gbps,
PATTERN 213 - 1 + 80CID)
MAX3863 toc03a
58ps/div
OPTICAL EYE DIAGRAM
(IMOD = 40mA, DATA RATE = 3.2Gbps,
PATTERN 213 - 1 + 80CID)
MAX3863 toc03b
58ps/div
SUPPLY CURRENT (ICC) vs.TEMPERATURE
(EXCLUDES BIAS AND
MODULATION CURRENTS)
MAX3863 toc04
SUPPLY CURRENT (mA)40-20020
DETERMINISTIC JITTER vs. IMOD
MAX3863 toc05
DETERMINISTIC JITTER (ps
P-P651525354555
3.2Gbps
2.7Gbps
PULSE-WIDTH ADJUST
vs. DIFFERENTIAL VPWC
MAX3863 toc06
PULSE-WIDTH ADJUST (ps)
-0.80.8
MAX3863
2.7Gbps Laser Driver with Modulation
Compensation
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted. See Typical Operating Circuit.)
MODULATION CURRENT vs.
MODULATION SET RESISTOR
MAX3863 toc07
RMODSET (kΩ)
IMOD
(mA)1
MODULATION MONITOR VOLTAGE
vs. MODULATION CURRENT
MAX3863 toc08
IMOD (mA)
MODMON
(mV)503520
BIAS CURRENT
vs. BIASMAX SET RESISTOR
MAX3863 toc09
RBIASMAX (kΩ)
IBIAS
(mA)
BIAS MONITOR VOLTAGE
vs. BIAS CURRENT
MAX3863toc10
IBIAS (mA)
BIASMON
(mV)
MONITOR DIODE CURRENT
vs. APCSET RESISTOR
MAX3863 toc11
RAPCSET (kΩ)
BIAS
(mA)
DIODE-CURRENT MONITOR VOLTAGE
vs. MONITOR DIODE CURRENT
MAX3863 toc12
IMD (mA)
MDMON
(V)
COMPENSATION (K)
vs. RMODCOMP
MAX3863 toc13
RMODCOMP (kΩ)
K (mA/mA)10.1
POWER-SUPPLY NOISE REJECTION
vs. FREQUENCY
MAX3863 toc14
FREQUENCY (kHz)
PSNR (dB)
0.110,000
SINGLE-ENDED S11 vs. FREQUENCY
MAX3863 toc15
FREQUENCY (GHz)
MAGNITUDE S11 (dB)312
-40
MAX3863
2.7Gbps Laser Driver with Modulation
Compensation
Pin Description
PIN NAME FUNCTION
1, 4, 5, 8,
14, 19, 22, 27 VCC Positive Supply Voltage DATA+Data Input, with On-Chip Termination DATA- Complementary Data Input, with On-Chip Termination CLK+ Clock Input for Data Retiming, with On-Chip Termination CLK- Complementary Clock Input for Data Retiming, with On-Chip Termination APCSET Monitor Diode Current Set Point
10 APCFILT1 APC Loop Filter Capacitor. Short to ground to disable the correction loop through the monitor
diode.
11 APCFILT2 APC Loop Filter Capacitor
12 PWC+ Input for Modulation Pulse-Width Adjustment. Connected to GND through RPWC.
13 PWC- Complementary Input for Modulation Pulse-Width Adjustment. Connected to GND through
RPWC.
15 MK+ Voltage Proportional to the Mark Density. MK+ = MK- for 50% duty cycle.
16 MK- Voltage Inversely Proportional to the Mark Density FAIL Alarm for Shorts on Current Set Pins and APC Loop Failure Conditions, Active Low
18 BIAS Laser Diode Bias Current Source (Sink Type) to Bias the Laser Diode. Connect to the laser
with an inductor.
20 MOD Driver Output. AC-coupled to the laser diode.
21 MODN Complementary Driver Output. Connect to dummy load off-chip.
23 MD Monitor Diode Connection
24 MDMON Monitor for MD Current. Voltage developed across an external resistor from mirrored MD
current.
25 MODMON Monitor for Modulation Current. Voltage developed from IMOD mirrored through an external
resistor.
26 BIASMON Monitor for Bias Current. Voltage developed from IBIAS mirrored through an external resistor.
28 MODCOMP Couples the Bias Current to the Modulation Current. Mirrors IBIAS through an external resistor.
Open for zero coupling.
29 MODSET External Resistor to Program IMODC (IMOD= IMODS+ IMODC)
30 BIASMAX External Resistor to Program the Maximum IBIASEN Modulation and Bias Current Enable, Active Low. Current disabled when floating or high. RTEN Data Retiming Enable Input, Active Low. Retiming disabled when floating or high. EPExposed Pad. The exposed pad must be soldered to circuit-board ground for proper thermal
and electrical operation.
Detailed Description
The MAX3863 laser driver has two main components: a
high-speed modulation driver and a biasing block with
APC. The clock and data inputs to the modulation driver
use CML logic levels. The optional clock signal synchro-
nizes data transitions for minimum pattern-dependent jit-
ter. Outputs to the laser diode consist of a switched
modulation current and a steady bias current. The APC
loop adjusts the laser diode bias current to maintain con-
stant average optical power. Compensation of the modu-
lation current can be programmed to keep a constant
extinction ratio over time and temperature. The modula-
tion output stage uses a programmable current source
with a maximum current of 80mA. A high-speed differen-
tial pair switches the source to the laser diode. The rise
and fall times are typically 50ps.
Optional Input Data Retiming
To eliminate pattern-dependent jitter in the input data, a
synchronous differential clock signal should be con-
nected to the CLK+ and CLK- inputs, and the RTEN
control input should be connected low. The input data
is retimed on the rising edge of CLK+. If RTENis tied
high or is left floating, the retiming function is disabled,
and the input data is directly connected to the output
stage. Leave CLK+ and CLK- open when retiming is
disabled.
Mark-Density Outputs
The MK+ and MK- outputs monitor the input signal
mark density. With a 50% mark density, both outputs
are the same voltage. More ones cause the MK+ volt-
age to increase and the MK- voltage to decrease.
Fewer ones than zeros cause MK- to be at a higher
voltage than MK+.
Pulse-Width Control
A pulse-width adjustment range of 50% to 150%
(±185ps) is available at 2.7Gbps. This feature compen-
sates pulse-width distortion elsewhere in the system.
Resistors at the PWC+ and PWC- pins program the
pulse width. The sum of the resistors is 1kΩ. The pins
can be left open for a 100% pulse width. A voltage also
can control these pins. A differential voltage of 600mV
(typ) gives ±185ps of pulse-width distortion.
Output Enable
The MAX3863 incorporates an input to enable current
to the laser diode. When ENis low, the modulation and
bias outputs at the MOD pin are enabled. When ENis
high or floating, the output is disabled. In the disabled
condition, bias and modulation currents are off.
Power-Supply Threshold
To prevent data errors caused by low supply, the
MAX3863 disables the laser diode current for supply
voltage less than 2.7V. The power-supply threshold and
MAX3863
2.7Gbps Laser Driver with Modulation
Compensation
PAT
N G
ENER
OSCILLOSCOPE
DATA+
DATA-
CLK+
CLK-
DATA+
DATA-MODN
MOD
APCFILT1
BIAS
CLK+
CLK-
RTENEN
50Ω
50Ω
VCC
VCC
0.1μF
0.1μF
50Ω
50Ω
50Ω
50Ω
15Ω
VCC
VCC
VCC
VCC
MAX3863
A - TOKO FSLB2520-330K
B - MURATA BLM11HA601SPT
50Ω
25Ω
Figure 1. AC Characterization
MAX3863
the output-enable must be true to enable bias and
modulation currents.
APC Loop Enable
The APC loop is enabled when an external capacitor is
placed between the APCFILT1 and APCFILT2 pins.
This capacitor sets the time constant of the APC loop.
To open the APC loop, the APCFILT1 pin is shorted to
ground. This shorts the feedback from the monitor
diode and causes the bias current to rise to the maxi-
mum value set by the BIASMAX pin.
APC Filter
The APC loop keeps the average optical power from the
laser constant. An external filter capacitor is used to stabi-
lize the APC loop. The typical capacitor value is 0.01µF.
APC Failure Monitor
The MAX3863 provides an APC failure monitor
(TTL/CMOS) to indicate an APC loop tracking failure.
FAILis set low when the APC loop cannot adjust the
bias current to maintain the desired monitor current.
Short-Circuit Protection
The MAX3863 provides short-circuit protection for mod-
ulation, bias, and monitor current sources. If BIASMAX,
MODSET, or APCSET is shorted to ground, the bias
and modulation output are turned off and FAILis active.
Current Monitors
The MAX3863 features monitor outputs for bias current
(BIASMON), modulation current (MODMON), and moni-
tor diode current (MDMON). The monitors are realized
by mirroring a fraction of the current and developing a
voltage across an external resistor. For the specified
voltage to monitor diode current, use an external 4kΩ
resistor at the MDMON output. Resistors for BIASMON
and MODMON are 100Ω. The minimum voltage at the
BIASMON and MODMON must be 2.1V for compliance.
Design Procedure
When designing a laser transmitter, the optical output is
usually expressed in terms of average power and
extinction ratio. Table 1 shows relationships helpful in
converting between the optical average power and the
modulation current. These relationships are valid only if
the mark density and duty cycle of the optical wave-
form are 50%.
For a desired laser average optical power (PAVG) and
optical extinction ratio (re), the required modulation cur-
rent can be calculated based on the laser slope effi-
ciency (η) using the equations in Table 1.
Laser Current Compensation
Requirements
Determine static bias and modulation current require-
ments from the laser threshold current and slope efficien-
cy. To use the APC loop with modulation compensation,IkMDMONMD=×44ΩI
MODMONCCMOD=×−45100ΩI
BIASMONCCBIAS=×−40100Ω
2.7Gbps Laser Driver with Modulation
Compensation
CLK+
CLK-
DATA+
IMOD
DATA-
7mA TO 80mA
tSUtHD
VID = 0.2VP-P TO 1.6VP-P
VIS = 0.1V TO 0.8V
VIS = 0.1V TO 0.8V
(DATA+) - (DATA-)

Partno	Mfg	Dc	Qty	Available	Descript
MAX3863ETJ+ \|MAX3863ETJ	MAXIM	N/a	10	avai	2.7Gbps Laser Driver with Modulation Compensation
MAX3863ETJ+ \|MAX3863ETJ	MAXIM/DALLAS	N/a	10	avai	2.7Gbps Laser Driver with Modulation Compensation
MAX3863ETJ+T	MAXIM	N/a	2500	avai	2.7Gbps Laser Driver with Modulation Compensation