MAX3996CGP Maxim Integrated Products, MAX3996CGP Datasheet

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MAX3996CGP

Manufacturer Part Number
MAX3996CGP
Description
Laser Driver +3.0V to +5.5V, 2.5G bps VCSEL and Laser
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX3996CGP

Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MAX3996CGP+T
Manufacturer:
MAXIM/美信
Quantity:
20 000
The MAX3996 is a high-speed laser driver for small-
form-factor (SFF) fiber optic LAN transmitters. It con-
tains a bias generator, a laser modulator, and
comprehensive safety features. Automatic power con-
trol (APC) adjusts the laser bias current to maintain
average optical power, regardless of changes in tem-
perature or laser properties. The driver accommodates
common anode or differential laser configurations. The
output current range of the MAX3996 is appropriate for
VCSELs and high-efficiency edge-emitting lasers.
The MAX3996 operates up to 3.2Gbps. It can switch up
to 30mA of laser modulation current and sink up to
60mA bias current. Adjustable temperature compensa-
tion is provided to keep the optical extinction ratio with-
in specifications over the operating temperature range.
The MAX3996 accommodates various laser packages,
including low-cost TO-46 headers. Low deterministic jit-
ter (9ps
(65ps) provides excellent margins compared to indus-
try-standard transmitter eye masks.
This laser driver provides extensive safety features to
guarantee single-point fault tolerance. Safety features
include a transmit disable, redundant shutdown, and
laser-bias monitoring. The safety circuit detects faults
that could cause hazardous light levels and immediate-
ly disables the laser output. The MAX3996 safety cir-
cuits are compliant with SFF and small-form-factor
pluggable (SFP) multisource agreements (MSA).
The MAX3996 is available in a compact 4mm
20-pin QFN package and a 20-pin thin QFN package. It
operates over a temperature range of 0°C to +70°C.
19-2194; Rev 3; 5/04
Pin Configuration appears at end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Fibre Channel Optical Transmitters
VCSEL Transmitters
Gigabit Ethernet Optical Transmitters
ATM LAN Optical Transmitters
10 Gigabit Ethernet WWDM
P-P
), combined with fast edge transitions,
________________________________________________________________ Maxim Integrated Products
General Description
Applications
3.0V to 5.5V, 2.5Gbps VCSEL
4mm,
o 9ps
o 20-Pin QFN 4mm
o 3.0V to 5.5V Supply Voltage
o Automatic Power Control
o Integrated Safety Circuits
o 30mA Laser Modulation Current
o Temperature Compensation of Modulation
o Compliant with SFF and SFP MSA
+ Denotes Lead-Free Package
MAX3996CGP
MAX3996CTP+
*FERRITE BEAD
Current
0.01µF
0.01µF
C
PART
PORDLY
P-P
TX_DISABLE
FAULT
IN+
IN-
PORDLY
TC
Deterministic Jitter
R
TC
MODSET MON1 MON2 COMP
Typical Application Circuit
and Laser Driver
R
0°C to +70°C
0°C to +70°C
MOD
RANGE
MAX3996
TEMP
V
V
Ordering Information
CC
CC
4mm Package
N.C.
SHDNDRV
C
COMP
PIN-
PACKAGE
20 QFN
20 Thin QFN
GND
OPTIONAL SHUTDOWN
OUT+
OUT-
BIAS
MD
CIRCUITRY
1.8kΩ
0.01µF
0.01µF
0.01µF
25Ω
Features
PACKAGE
CODE
G2044-3
T2044-3
L1*
V
CC
R
SET
1

Related parts for MAX3996CGP

MAX3996CGP Summary of contents

Page 1

... QFN 4mm o 3.0V to 5.5V Supply Voltage o Automatic Power Control o Integrated Safety Circuits o 30mA Laser Modulation Current o Temperature Compensation of Modulation Current o Compliant with SFF and SFP MSA PART MAX3996CGP MAX3996CTP+ + Denotes Lead-Free Package 4mm, ✕ Applications 0.01µF 0.01µF C PORDLY ...

Page 2

VCSEL and Laser Driver ABSOLUTE MAXIMUM RATINGS Supply Voltage at V ...........................................-0.5V to +7.0V CC Voltage at TX_DISABLE, PORDLY, MON1, COMP, IN+, IN-, MD, BIAS, MODSET, TC..........-0. Voltage between COMP and MON2 .....................................2.3V Voltage ...

Page 3

ELECTRICAL CHARACTERISTICS (continued 3.0V to 5.5V 0°C to +70°C, unless otherwise noted. Typical values are +25°C.) (Figure 1) PARAMETER SYMBOL Minimum Modulation Current Maximum Modulation Current Accuracy of Modulation Current (Part-to-Part Variation) ...

Page 4

VCSEL and Laser Driver (V = 3.3V +25°C, unless otherwise noted ELECTRICAL EYE DIAGRAM 30mA PRBS, 2.5Gbps) MOD 25Ω LOAD 120mV/ div 64ps/div OPTICAL EYE DIAGRAM ...

Page 5

T = +25°C, unless otherwise noted HOT PLUG WITH TX_DISABLE LOW 3. LOW FAULT LOW t_init = 23mS TX_DISABLE LASER OUPUT 10.0ms/div TRANSMITTER DISABLE 3. t_off = 60ns LOW FAULT ...

Page 6

VCSEL and Laser Driver PIN NAME Temperature Compensation Set. The resistor at TC programs the temperature-increasing component the laser-modulation current. 2 FAULT Fault Indicator. See Table GND Ground Transmit Disable. ...

Page 7

TO 5. MAX3996 R OUT 0.01µF IN 0.01µF IN- MODULATION CURRENT GENERATOR TC MODSET R *MURATA MOD BLM11HA102SG Figure 1. Output Load for AC Specification Detailed Description The MAX3996 ...

Page 8

VCSEL and Laser Driver Table 1. Typical Fault Conditions PIN FAULT CONDITION MON2 V > 400mV MON2 BIAS V < 400mV BIAS TC, MODSET MODSET TC During startup, the laser does not emit ...

Page 9

Table 2. R and R Selection Table TC MOD i = 30mA TEMPCO MOD (ppm/°C) R (kΩ) MOD 3500 17.1 3000 8.04 2500 5.20 2000 3.81 1500 2.98 1000 2.44 500 2.05 Table 3. Circuit Responses to Various Single-Point Faults ...

Page 10

VCSEL and Laser Driver V PORDLY CC STARTUP DELAY V BG BIAS ENABLE TX_DISABLE MODULATOR ENABLE FAULT LATCH BIAS FAULT 1 BIAS FAULT 2 TC FAULT MODSET FAULT Figure 7. Safety Circuitry Functional Diagram Latched Fault ...

Page 11

R = 25Ω Ω MOD Figure 8. R vs. R for Various Conditions TC MOD OPTIONAL SHUTDOWN CIRCUITRY V 1.8kΩ SHDNDRV CC TX_DISABLE ...

Page 12

VCSEL and Laser Driver V SMOOTH CC MONITOR DIODE SET D *FERRITE BEAD Figure 11. APC Loop monitor photodiode current is set by I Determine the desired monitor current (I select R = ...

Page 13

The compensation components (R easily determined by experimentation. For interfacing with edge-emitting lasers, refer to application note HFAN-2.0, Interfacing Maxim Laser Drivers with Laser Diodes. Begin with R = 50Ω and until the desired transmitter response is ...

Page 14

VCSEL and Laser Driver Figure 14. SHDNDRV Output PACKAGE OUT- 1.1nH 0.15pF 1pF Figure 15. Modulator Outputs 14 ______________________________________________________________________________________ V CC MAX3996 10kΩ 550Ω 60Ω 50Ω 50Ω MAX3996 SHDNDRV PACKAGE OUT+ 1.1nH ...

Page 15

MAX3996 PACKAGE V CC IN+ 1.1nH 0.15pF 1pF V CC IN- 1.1nH 0.15pF 1pF Figure 16. Data Inputs TOP VIEW FAULT 2 GND 3 MAX3996 TX_DISABLE 4 PORDLY QFN (4mm ...

Page 16

... Maxim reserves the right to change the circuitry and specifications without notice at any time. 16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2004 Maxim Integrated Products For the latest package outline information www.maxim-ic.com/packages. PART MAX3996CGP MAX3996CTP + Printed USA is a registered trademark of Maxim Integrated Products. Package Information PACKAGE PACKAGE ...

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