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Part: MAX3289
Category:
Communication
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Description: 3.0V to 5.5V, 1.25Gbps/2.5Gbps Lan Laser Drivers
Company: Maxim Integrated Products
Datasheet: Download MAX3289 datasheet File size : 317 kB
Request For quote: Find where to buy MAX3289
Datasheet text preview:
19-1550; Rev 4; 12/02
3.0V to 5.5V, 1.25Gbps/2.5Gbps LAN Laser Drivers
General Description
The MAX3286/MAX3296 series of products are highspeed laser drivers for fiber optic LAN transmitters optimized for Gigabit Ethernet applications. Each device contains a bias generator, laser modulator, and comprehensive safety features. Automatic power control (APC) adjusts the laser bias current to maintain average optical power at a constant level, regardless of changes in temperature or laser properties. For lasers without a monitor photodiode, these products offer a constant-current mode. The circuit can be configured for use with conventional shortwave (780nm to 850nm) or longwave (1300nm) laser diodes, as well as verticalcavity surface-emitting lasers (VCSELs). T h e MAX3286 series (MAX3286MAX3289) is optimized for operation at 1.25Gbps, and the MAX3296 series (MAX3296MAX3299) is optimized for 2.5Gbps operation. Each device can switch 30mA of laser modulation current at the specified data rate. Adjustable temperature compensation is provided to keep the optical extinction ratio within specifications over the operati n g temperature range. This series of devices is optimized to drive lasers packaged in low-cost TO-46 headers. Deterministic jitter (DJ) for the MAX3286 is t y p i c a l l y 22ps, allowing a 72% margin to Gigabit Ethernet DJ specifications. These laser drivers provide extensive safety features to guarantee single-point fault tolerance. Safety features include dual enable inputs, dual shutdown circuits, and a laser-power monitor. The safety circuit detects faults that could cause dangerous light output levels. A programmable power-on reset pulse initializes the laser driver at startup. The MAX3286/MAX3296 are available in a compact, 5mm 5mm, 28-pin QFN package; a 5mm 5mm, 32-pin TQFP package; or in die form. The MAX3287/MAX3288/ MAX3289 and MAX3297/MAX3298/MAX3299 are available in a 16-pin TSSOP-EP package. o 7ps Deterministic Jitter (MAX3296) 22ps Deterministic Jitter (MAX3286) o +3.0V to +5.5V Supply Voltage o Selectable Laser Pinning (Common Cathode or Common Anode) (MAX3286/MAX3296) o 30mA Laser Modulation Current o Temperature Compensation of Modulation Current o Automatic Laser Power Control or Constant Bias Current o Integrated Safety Circuits o Power-On Reset Signal o QFN Package Available
Features
MAX3286MAX3289/MAX3296MAX3299
Ordering Information
PART MAX3286CGI MAX3286CHJ TEMP RANGE 0°C to +70°C 0°C to +70°C PIN-PACKAGE 28 QFN (5mm x 5mm)** 32 TQFP (5mm x 5mm)
MAX3286C/D 0°C to +70°C Dice* Ordering Information continued at end of data sheet. *Dice are designed to operate from TJ = 0°C to +110°C, but are tested and guaranteed only at TA = +25°C. **Exposed pad.
Pin Configurations
OUT+ OUTVCC VCC
28
TC
27
26
25
24
23
FAULT FAULT POR GND EN EN PORDLY
1 2 3 4 5 6 7
22 21 20 19
VCC
TOP VIEW
MODSET
BIASDRV SHDNDRV GND MON MD POL POL
Applications
Gigabit Ethernet Optical Transmitter Fibre Channel Optical Transmitter ATM LAN Optical Transmitter
MAX3286 MAX3296
18 17 16 15
10
11
12
13
GND
FLTDLY
LV
V CC
IN+
IN-
Typical Application Circuits and Selector Guide appear at end of data sheet.
QFN*
*Exposed pad is connected to GND. Pin Configurations continued at end of data sheet. 1
________________________________________________________________ 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.
REF
14
8
9
3.0V to 5.5V, 1.25Gbps/2.5Gbps LAN Laser Drivers MAX3286MAX3289/MAX3296MAX3299
ABSOLUTE MAXIMUM RATINGS
Supply Voltage at VCC .........-0.5V to +7.0V Voltage at EN, EN, PORDLY, FLTDLY, LV, IN+, IN-, REF, POL, POL, MD, MON, BIASDRV, MODSET, TC.......-0.5V to (VCC + 0.5V) Voltage at OUT+, OUT- .......(VCC - 2V) to (VCC + 2V) Current into FAULT, FAULT, POR, SHDNDRV....-1mA to +25mA Current into OUT+, OUT- ....60mA Continuous Power Dissipation (TA = +70°C) 32-Pin TQFP (derate 14.3mW/°C above +70°C).........1100mW 28-Pin QFN (derate 28.7mW/°C above +70°C) ..........2300mW 16-Pin TSSOP (derate 27mW/°C above +70°C) .........2162mW Operating Temperature Range.......0°C to +70°C Operating Junction Temperature Range .....0°C to +150°C Processing Temperature (die) ........+400°C Storage Temperature Range .....-55°C to +150°C Lead Temperature (soldering, 10s) .........+300°C
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.
ELECTRICAL CHARACTERISTICS
(VCC = +3.0V to +5.5V, TA = 0°C to +70°C, unless otherwise noted. Typical values are at VCC = +3.3V, RTC = open and TA = +25°C; see Figure 1a.) PARAMETER Supply Current Data Input Voltage Swing TTL Input Current TTL Input High Voltage TTL Input Low Voltage FAULT, FAULT Output High Voltage FAULT, FAULT Output Low Voltage BIAS GENERATOR (Note 1) BIASDRV Current, Shutdown BIASDRV Current Sink BIASDRV Current Source REF Voltage MD Nominal Voltage MD Voltage During Fault MD Input Current MON Input Current POWER-ON RESET POR Threshold POR Hysteresis FAULT DETECTION REF Fault Threshold MD High Fault Threshold MD Low Fault Threshold MON Fault Threshold MODSET, TC Fault Threshold 2 _______________________________________________________________________________________ MAX3286/MAX3288/MAX3296/MAX3298 VMD + 5% VMD - 20% VCC 600 2.95 VMD + 20% VMD - 5% VCC 480 0.9 V LV = GND LV = open 3.9 2.65 150 4.5 3.00 V mV VMD EN = GND FAULT = low, VBIASDRV 0.6V FAULT = low, VBIASDRV VCC - 1V IREF 2mA, MON = VCC APC loop is closed Common-cathode configuration Common-anode configuration Normal operation (FAULT = low) VMON = VCC 2 -2 -1 0.8 0.8 2.45 1.55 2.65 1.7 0.4 VCC - 0.8 +0.16 0.44 +2 6 2.85 1.85 1.2 +1 µA mA mA V V V µA µA VIH VIL VOH VOL IOH = -100µA IOL = 1mA 2.4 0.4 SYMBOL ICC VID CONDITIONS Figure 1a, RMOD = 1.82k Total differential signal, peak-to-peak, Figure 1a 0 VPIN VCC 200 -100 2 0.8 MIN TYP 52 MAX 75 1660 +100 UNITS mA mV µA V V V V
mV V
3.0V to 5.5V, 1.25Gbps/2.5Gbps LAN Laser Drivers
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +3.0V to +5.5V, TA = 0°C to +70°C, unless otherwise noted. Typical values are at VCC = +3.3V, RTC = open and TA = +25°C; see Figure 1a.) PARAMETER SHUTDOWN ISHDNDRV = 10µA, FAULT asserted Voltage at SHDNDRV LASER MODULATOR Data Rate Minimum Laser Modulation Current Maximum Laser Modulation Current Tolerance of Modulation Current Modulation-Current Edge Speed RL 25 RMOD = 1.9k (IMOD = 30mA) RMOD = 13k (IMOD = 5mA) 20% to 80% MAX3286 series MAX3296 series RMOD = 13k (IMOD = 5mA) MAX3286 series RMOD = 4.1k (IMOD = 15mA) RMOD = 1.9k (IMOD = 30mA) RMOD = 13k (IMOD = 5mA) MAX3296 series RMOD = 4.1k (IMOD = 15mA) RMOD = 1.9k (IMOD = 30mA) Random Jitter (Note 3) Shutdown Modulation Current Modulation-Current Temperature Coefficient Differential Input Resistance Output Resistance Input Bias Voltage LASER SAFETY CIRCUIT PORDLY = open POR Delay Fault Time Glitch Rejection at MD tPORDLY tFAULT CPORDLY = 0.01µF, MAX3286/MAX3296 only (Note 4) 10 0.3 3 1.25 5.5 22 20 µs ms µs µs 3 Single ended Tempco = max, RMOD = open; Figure 5 Tempco = min, RTC = open; Figure 5 620 42 RMS MAX3286 series MAX3296 series 30 -10 -15 130 90 46 29 22 14 8 7 2 2 15 4000 50 800 50 VCC - 0.3 980 58 +10 +15 220 150 65 45 35 ps 35 22 20 8 4 200 ps µA ppm/°C V MAX3286 series MAX3296 series 1.25 2.5 Gbps ISHDNDRV = 15mA, FAULT not asserted ISHDNDRV = 1mA, FAULT not asserted VCC - 0.4 0 0 VCC - 1.2 VCC - 2.4 V SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX3286MAX3289/MAX3296MAX3299
2
mA mA % ps
Deterministic Jitter (Note 2)
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