MAX3735AETG+T Maxim Integrated Products, MAX3735AETG+T Datasheet

IC LSR DRVR 2.7GBPS 3.63V 24TQFN

MAX3735AETG+T

Manufacturer Part Number
MAX3735AETG+T
Description
IC LSR DRVR 2.7GBPS 3.63V 24TQFN
Manufacturer
Maxim Integrated Products
Type
Laser Diode Driver (Fiber Optic)r
Datasheet

Specifications of MAX3735AETG+T

Data Rate
2.7Gbps
Number Of Channels
1
Voltage - Supply
2.97 V ~ 3.63 V
Current - Supply
27mA
Current - Modulation
85mA
Current - Bias
100mA
Operating Temperature
-40°C ~ 85°C
Package / Case
24-TQFN Exposed Pad
Mounting Type
Surface Mount
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX3735/MAX3735A are +3.3V laser drivers for
SFP/SFF applications from 155Mbps up to 2.7Gbps.
The devices accept differential input data and provide
bias and modulation currents for driving a laser. DC-
coupling to the laser allows for multirate applications
and reduces the number of external components. The
MAX3735/MAX3735A are fully compliant with the SFP
MSA timing and the SFF-8472 transmit diagnostic
requirements.
An automatic power-control (APC) feedback loop is incor-
porated to maintain a constant average optical power
over temperature and lifetime. The wide modulation cur-
rent range of 10mA to 60mA (up to 85mA AC-coupled)
and bias current of 1mA to 100mA make this product
ideal for driving FP/DFB laser diodes in fiber-optic mod-
ules. The resistor range for the laser current settings is
optimized to interface with the DS1858 SFP controller IC.
The MAX3735/MAX3735A provide transmit-disable con-
trol, a single-point latched transmit-failure monitor out-
put, photocurrent monitoring, and bias-current
monitoring to indicate when the APC loop is unable to
maintain the average optical power. The MAX3735A
also features improved multirate operation.
The MAX3735/MAX3735A come in package and die
form, and operate over the extended temperature
range of -40°C to +85°C.
19-2529; Rev 2; 7/04
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.
Gigabit Ethernet SFP/SFF Transceiver Modules
1G/2G Fibre Channel SFP/SFF Transceiver
Modules
Multirate OC3 to OC48-FEC SFP/SFF Transceiver
Modules
________________________________________________________________ Maxim Integrated Products
2.7Gbps, Low-Power SFP Laser Drivers
SERDES
General Description
DS1858/DS1859
CONTROLLER
IC
Applications
MON1
M0N2
M0N3
H0
H1
0.1µF
0.1µF
IN+
IN-
+3.3V
MAX3735A
MAX3735
REPRESENTS A CONTROLLED-IMPEDANCE TRANSMISSION LINE
C
+3.3V
APC
*Dice are designed to operate from -40°C to +85°C, but are
tested and guaranteed only at T
**EP = Exposed pad.
+Denotes lead-free package.
Pin Configuration appears at end of data sheet.
MAX3735E/D
MAX3735ETG
MAX3735EGG
MAX3735AETG
MAX3735AETG+
SFP Reference Design Available
Fully Compliant with SFP and SFF-8472 MSAs
Programmable Modulation Current from 10mA to
60mA (DC-Coupled)
Programmable Modulation Current from 10mA to
85mA (AC-Coupled)
Programmable Bias Current from 1mA to 100mA
Edge Transition Times <51ps
27mA (typ) Power-Supply Current
Multirate 155Mbps to 2.7Gbps Operation
Automatic Average Power Control
On-Chip Pullup Resistor for TX_DISABLE
24-Pin 4mm × 4mm QFN package
OUT+
OUT+
OUT-
BIAS
OPTIONAL SHUTDOWN
R
R
MD
BC_MON
PC_MON
PART
CIRCUITRY
FERRITE BEAD
15Ω
10Ω
+3.3V
Typical Application Circuit
+3.3V
C
MD
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Ordering Information
0.01µF
A
= +25°C.
PIN-PACKAGE
Dice*
24 Thin QFN-EP**
24 QFN-EP**
24 Thin QFN-EP**
24 Thin QFN-EP**
Features
1

Related parts for MAX3735AETG+T

MAX3735AETG+T Summary of contents

Page 1

... Multirate OC3 to OC48-FEC SFP/SFF Transceiver Modules SERDES DS1858/DS1859 CONTROLLER IC ________________________________________________________________ Maxim Integrated Products 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. SFP Reference Design Available Fully Compliant with SFP and SFF-8472 MSAs Programmable Modulation Current from 10mA to ...

Page 2

Low-Power SFP Laser Drivers ABSOLUTE MAXIMUM RATINGS Supply Voltage, V ..............................................-0.5V to +6.0V CC Current into BIAS, OUT+, OUT- ......................-20mA to +150mA Current into MD.....................................................-5mA to +5mA Voltage at IN+, IN-, TX_DISABLE, TX_FAULT, SHUTDOWN ...........................................-0. Voltage at ...

Page 3

Low-Power SFP Laser Drivers ELECTRICAL CHARACTERISTICS (continued +2.97V to +3.63V -40°C to +85°C. Typical values otherwise noted.) (Note 1) PARAMETER SYM AUTOMATIC POWER-CONTROL LOOP MD Reverse Bias Voltage ...

Page 4

Low-Power SFP Laser Drivers ELECTRICAL CHARACTERISTICS (continued +2.97V to +3.63V -40°C to +85°C. Typical values otherwise noted.) (Note 1) PARAMETER SYM SAFETY FEATURES Excessive Bias-Current Comparator Threshold Range ...

Page 5

Low-Power SFP Laser Drivers VOLTAGE CURRENT I + OUT TIME Figure 1. Required Input Signal and Output Polarity SOURCE NOISE VOLTAGE SUPPLY Figure 3. Supply Filter ...

Page 6

Low-Power SFP Laser Drivers (V = +3.3V 0.01µ 20mA, and I CC APC BIAS OPTICAL EYE E = 8.2dB, 2.7Gbps, 2.3GHz FILTER PRBS, 1310nm FP LASER 54ps/div OPTICAL EYE E ...

Page 7

Low-Power SFP Laser Drivers (V = +3.3V 0.01µ 20mA, and I CC APC BIAS PHOTOCURRENT MONITOR GAIN vs. TEMPERATURE 3.0 2.5 2.0 1.5 1.0 0.5 0 -40 - TEMPERATURE (°C) EDGE TRANSITION ...

Page 8

Low-Power SFP Laser Drivers (V = +3.3V 0.01µ 20mA, and I CC APC BIAS TRANSMITTER DISABLE 3. FAULT LOW LOW TX_DISABLE LASER OUTPUT 40ns/div FAULT RECOVERY TIME V PC_MON EXTERNAL FAULT REMOVED HIGH ...

Page 9

Low-Power SFP Laser Drivers PIN NAME 14 +3.3V Supply Voltage CC 2 IN+ Noninverted Data Input 3 IN- Inverted Data Input Photodiode Current Monitor Output. Current out of this pin develops a ground-referenced voltage ...

Page 10

Low-Power SFP Laser Drivers INPUT BUFFER IN+ 100Ω IN PC_MON R PC_MON V CC X270 I BIAS BC_MON R BC_MON MODSET R MODSET Figure 4. Functional Diagram Laser-Biasing and APC To ...

Page 11

Low-Power SFP Laser Drivers V CC TX_DISABLE PC_MON R PC_MON BC_MON R BC_MON Figure 5. Safety Circuitry Table 1. Typical Fault Conditions If any of the I/O pins is shorted to GND point failure, see Table ...

Page 12

Low-Power SFP Laser Drivers Table 2. Circuit Responses to Various Single-Point Faults CIRCUIT RESPONSE TO OVERVOLTAGE PIN NAME OR SHORT TO V TX_FAULT Does not affect laser power. TX_DISABLE Modulation and bias currents are disabled. The optical average power ...

Page 13

Low-Power SFP Laser Drivers Input Termination Requirements The MAX3735/MAX3735A data inputs are SFP MSA compliant. On-chip 100Ω differential input impedance is provided for optimal termination (Figure 6). Because of the on-chip biasing network, the MAX3735/MAX3735A inputs self-bias to the ...

Page 14

Low-Power SFP Laser Drivers Capacitors Used with MAX3735/MAX3735A SFP Module Designs for more information on choosing C and AC-coupled laser interfaces. Use the following equation to find the C using the MAX3735 4.04 × 10 × ...

Page 15

Low-Power SFP Laser Drivers GND TX_DISABLE IN PC_MON 2 BC_MON INDEX PAD GND GND ______________________________________________________________________________________ MAX3735 Chip Topography 0.079" (2.007mm) APCSET GND APCFILT2 APCFILT1 9 ...

Page 16

Low-Power SFP Laser Drivers Bonding Coordinates Table 5. MAX3735 Bondpad Locations PAD NAME 1* BC_MON 2 PC_MON IN GND 8 TX_DISABLE 9 APCSET 10 GND 11 APCFILT2 12 APCFILT1 ...

Page 17

Low-Power SFP Laser Drivers (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) ______________________________________________________________________________________ Package Information PACKAGE OUTLINE 12,16,20,24L QFN, 4x4x0. 21-0106 E ...

Page 18

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 18 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...

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