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MAX3296 Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX3296 Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 11 page General Description The MAX3286/MAX3296 series of products are high- speed laser drivers for fiber optic LAN transmitters opti- mized for Gigabit Ethernet applications. Each device contains a bias generator, laser modulator, and com- prehensive safety features. Automatic power control (APC) adjusts the laser bias current to maintain aver- age 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 vertical- cavity surface-emitting lasers (VCSELs). The MAX3286 series (MAX3286–MAX3289) is opti- mized for operation at 1.25Gbps, and the MAX3296 series (MAX3296–MAX3299) is optimized for 2.5Gbps operation. Each device can switch 30mA of laser mod- ulation current at the specified data rate. Adjustable temperature compensation is provided to keep the opti- cal extinction ratio within specifications over the operat- ing 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 typically 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 pro- grammable power-on reset pulse initializes the laser driver at startup. The MAX3286/MAX3296 are available in a compact, 5mm ✕ 5mm, 28-pin QFN or thin 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. Applications Gigabit Ethernet Optical Transmitter Fibre Channel Optical Transmitter ATM LAN Optical Transmitter Features ♦ 7ps Deterministic Jitter (MAX3296) 22ps Deterministic Jitter (MAX3286) ♦ +3.0V to +5.5V Supply Voltage ♦ Selectable Laser Pinning (Common Cathode or Common Anode) (MAX3286/MAX3296) ♦ 30mA Laser Modulation Current ♦ Temperature Compensation of Modulation Current ♦ Automatic Laser Power Control or Constant Bias Current ♦ Integrated Safety Circuits ♦ Power-On Reset Signal ♦ QFN and Thin QFN Packages Available 3.0V to 5.5V, 1.25Gbps/2.5Gbps LAN Laser Drivers ________________________________________________________________ Maxim Integrated Products 1 19-1550; Rev 6; 11/04 Ordering Information continued at end of data sheet. Ordering Information Typical Application Circuits and Selector Guide appear at end of data sheet. *Exposed pad is connected to GND. Pin Configurations continued at end of data sheet. PART TEMP RANGE PIN-PACKAGE MAX3286CTI+ 0°C to +70°C 28 Thin QFN (5mm x 5mm)**** MAX3286CGI 0°C to +70°C 28 QFN (5mm x 5mm)*** MAX3286CHJ 0°C to +70°C 32 TQFP (5mm x 5mm) 15 16 17 18 19 20 21 POL POL MD MON GND SHDNDRV BIASDRV 7 6 5 4 3 2 1 PORDLY EN EN GND POR FAULT FAULT MAX3286 MAX3296 THIN QFN* TOP VIEW + Pin Configurations 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. *Dice are designed to operate from TJ = 0°C to +110°C, but are tested and guaranteed only at TA = +25°C. **Exposed pad. ***Package Code: G2855-1 ****Package Code: T2855-7 +Denotes Lead-Free Package. |
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