Rainbow-electronics MAX3737 Uživatelský manuál

Procházejte online nebo si stáhněte Uživatelský manuál pro Komunikace Rainbow-electronics MAX3737. Rainbow Electronics MAX3737 User Manual Uživatelská příručka

  • Stažení
  • Přidat do mých příruček
  • Tisk
  • Strana
    / 17
  • Tabulka s obsahem
  • KNIHY
  • Hodnocené. / 5. Na základě hodnocení zákazníků
Zobrazit stránku 0
General Description
The MAX3737 is a +3.3V laser driver designed for
multirate transceiver modules with data rates from
155Mbps to 2.7Gbps. Lasers can be DC-coupled to the
MAX3737 for reduced component count and ease of
multirate operation.
Laser extinction ratio control (ERC) combines the features
of automatic power control (APC), modulation compensa-
tion, and built-in thermal compensation. The APC loop
maintains constant average optical power. Modulation
compensation increases the modulation current in pro-
portion to the bias current. These control loops combined
with thermal compensation maintain a constant optical
extinction ratio over temperature and lifetime.
The MAX3737 accepts differential data input signals.
The wide 5mA to 60mA (up to 85mA AC-coupled) mod-
ulation current range and up to 100mA bias current
range makes the MAX3737 ideal for driving FP/DFB
lasers in fiber-optic modules. External resistors set the
required laser current levels. The MAX3737 provides
transmit disable control (TX_DISABLE), single-point
fault tolerance, bias-current monitoring, modulation-cur-
rent monitoring, and photocurrent monitoring. The
device also offers a latched failure output (TX_FAULT)
to indicate faults, such as when the APC loop is no
longer able to maintain the average optical power at the
required level. The MAX3737 is compliant with the SFF-
8472 transmitter diagnostic and SFP MSA timing
requirements.
The MAX3737 is offered in a 5mm x 5mm 32-pin thin QFN
and QFN package and operates over the -40°C to +85°C
extended temperature range.
Applications
Multirate OC-3 to OC-48 FEC Transceivers
Gigabit Ethernet SFF/SFP and GBIC
Transceivers
1Gbps/2Gbps Fibre Channel SFF/SFP and GBIC
Transceivers
Features
Single +3.3V Power Supply
47mA Power-Supply Current
85mA Modulation Current
100mA Bias Current
Automatic Power Control (APC)
Modulation Compensation
On-Chip Temperature Compensation
Self-Biased Inputs for AC-Coupling
Ground-Referenced Current Monitors
Laser Safety, Shutdown, and Alarm Outputs
MAX3737
Multirate Laser Driver with Extinction
Ratio Control
________________________________________________________________ Maxim Integrated Products 1
32
31
30
29
28
27
26
MODTCOMP
TH_TEMP
MODBCOMP
MODSET
APCSET
APCFILT2
APCFILT1
25 VMD
9
10
11
12
13
14
15
MC_MON
GND
V
CC
TX_FAULT
SHUTDOWN
VBS
GND
16GND
17
18
19
20
21
22
23
BIAS
*THE EXPOSED PADDLE MUST BE SOLDERED TO SUPPLY GROUND
TO ACHIEVE SPECIFIED PERFORMANCE.
V
CC
OUT-
OUT-
OUT+
OUT+
V
CC
8
7
6
5
4
3
2
BC_MON
PC_MON
V
CC
IN-
IN+
V
CC
TX_DISABLE
MAX3737EGJ
1GND
24 MD
TOP VIEW
5mm x 5mm
QFN
Pin Configurations
Ordering Information
19-2818; Rev 0; 4/03
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.
EVALUATION KIT
AVAILABLE
PART TEMP RANGE PIN-PACKAGE
MAX3737ETJ -40°C to +85°C 32 Thin QFN
MAX3737EGJ -40°C to +85°C 32 QFN
Functional Diagram and Typical Application Circuit appear
at end of data sheet.
Pin Configurations continued at end of data sheet.
Zobrazit stránku 0
1 2 3 4 5 6 ... 16 17

Shrnutí obsahu

Strany 1 - Ratio Control

General DescriptionThe MAX3737 is a +3.3V laser driver designed for multirate transceiver modules with data rates from155Mbps to 2.7Gbps. Lasers can b

Strany 2

MAX3737Safety Circuitry Current MonitorsThe MAX3737 features monitors (MC_MON, BC_MON,PC_MON) for modulation current (IMOD), bias current(IBIAS), and

Strany 3

100Ω resistor to ground at each monitor output gives thefollowing relationships:VMC_MON= (IMOD/ 268) ✕ 100ΩVBC_MON= (IBIAS/ 82) ✕ 100ΩVPC_MON= IMD✕ 10

Strany 4

MAX3737An external resistor at the MODBCOMP pin sets currentproportional to IBIAS. Open circuiting the MODBCOMPpin can turn off the interaction betwee

Strany 5

Layout ConsiderationsTo minimize loss and crosstalk, keep the connectionsbetween the MAX3737 output and the laser diode asshort as possible. Use good

Strany 6

MAX3737Exposed-Pad (EP) PackageThe exposed-pad on the 32-pin QFN provides a very lowthermal resistance path for heat removal from the IC. Thepad is al

Strany 7

MAX3737Multirate Laser Driver with Extinction Ratio Control______________________________________________________________________________________ 15IN

Strany 8

Package Information(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline informat

Strany 9

MAX3737Multirate Laser Driver with Extinction Ratio ControlMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely e

Strany 10

MAX3737Multirate Laser Driver with Extinction Ratio Control2 _______________________________________________________________________________________AB

Strany 11

MAX3737Multirate Laser Driver with Extinction Ratio ControlELECTRICAL CHARACTERISTICS (continued)(VCC= +2.97V to +3.63V, TA = -40°C to +85°C. Typical

Strany 12

MAX3737Multirate Laser Driver with Extinction Ratio Control4 _______________________________________________________________________________________Ty

Strany 13

MAX3737Multirate Laser Driver with Extinction Ratio Control200230220210240250260270280290300-40 10-15 35 60 85MODULATION-CURRENT MONITOR GAINvs. TEMPE

Strany 14

MAX3737Multirate Laser Driver with Extinction Ratio Control6 _______________________________________________________________________________________Ty

Strany 15

MAX3737Multirate Laser Driver with Extinction Ratio ControlPin DescriptionPIN NAME FUNCTION1, 10, 15, 16 GND Ground2 TX_DISABLETransmitter Disable, TT

Strany 16

MAX3737Detailed DescriptionThe MAX3737 laser driver consists of three main parts: ahigh-speed modulation driver, biasing block with ERC,and safety cir

Strany 17 - QFN THIN.EPS

Modulation compensation from bias increases the mod-ulation current by a user-selected proportion (K) need-ed to maintain peak-to-peak laser power as

Komentáře k této Příručce

Žádné komentáře