PHY1078
FTTx Burst Mode Laser Driver / Postamplifier
The PHY1078 is a combined burst mode laser driver and limiting amplifier for use within fiber optic modules for FTTx applications. Used with the PHY1095 or PHY1097 transimpedance amplifiers and a low cost serial EEPROM it forms a complete PON diplexer silicon solution. The transmit block includes a high frequency modulator and a bias current generator. The bias current can be controlled either by a fast settling APC loop or in open loop mode which uses a temperature lookup table. The receiver includes a limiting amplifier with programmable bandwidth. A Signal Detect/Loss Of Signal function is implemented using the input signal modulation amplitude with user selectable threshold and hysteresis. Operating with a 3.3V supply and rated from -40 to +85°C ambient, the PHY1078 is housed in a 32pin, 5x5mm, RoHS compliant, QFN package.
Key features
- Burst-Mode common anode laser driver with up to 80mA modulation and 90mA bias current
- 7ns output switching in Burst Mode
- Closed or open loop bias mode with temperature lookup table
- Temperature compensated modulation current
- Limiting amplifier with programmable low pass filter and output swing
- Device settings stored in external 2k EEPROM
Applications
- GEPON
- BPON
