MAX3669 is a 3.3V laser driver with automatic power control (APC) circuitry from MAXIM company. It is suitable for SDH/SONET applications with a bandwidth of up to 622Mbps. The device uses differential PECL inputs, provides bias and modulation currents, and operates over a temperature range of -40°C to +85°C. The built-in APC feedback loop maintains a constant average optical power over temperature and lifetime. This device has a wide modulation current range from 5mA to 75mA and a bias current of 1mA to 80mA, which are easy to program, making it ideal for use in various SDH/SONET applications. MAX3669 also provides enable control and a failure-monitor output to indicate when the APC loop is unable to maintain the average optical power. The device is available in a 5mm 32-pin TQFP package as well as in dice.
The MAX3669 laser driver provides a complete +3.3 V solution with automatic power control (APC) for SDH/SONET applications up to 622 Mbps. It accepts differential PECL inputs, offers programmable bias (1 mA‑80 mA) and modulation (5 mA‑75 mA) currents, and includes BIASMON and MODMON pins for current monitoring.
The device is supplied in a 32‑pin 5 mm × 5 mm TQFP package (or dice) and operates from –40 °C to +85 °C. Key features include single‑supply operation, 200 ps rise/fall time, enable control, and an APC failure monitor.
| Supply Voltage (Voc) | +3.14 V to +5.5 V |
|---|---|
| Supply Current (typical) | 40 mA |
| Rise/Fall Time | 200 ps |
| Package | 32‑pin TQFP (5 mm × 5 mm) |
| Operating Temperature Range | -40 °C to +85 °C |
The supply voltage (Voc) ranges from +3.14 V to +5.5 V.
Typical supply current is 40 mA.