Semtech Corporation GN25L95
The GN25L95 is a combined burst mode laser driver and limiting post amplifier designed for fiber optic transceiver modules. The GN25L95 features on-chip digital diagnostic monitoring and digital set-up. This enables a complete solution for SFP/SFF optical transceiver modules.FEATURES
● 100 mA bias current and 90 mA modulation current output drive capability● On-chip Digital Diagnostic Monitoring (DDMI)
● Automatic Mean Power and Automatic Extinction Ratio control
● Fast burst-mode loop settling time
● Current DAC output for APD bias control
● TX_SD and rogue ONU alarm function
● True average Tx burst power monitor
● Tx fault detection and safety logic
● Power down and sleep mode support
● CSFP I2C addressing support
APPLICATIONS
● EPON & GPON FTTh ONU/ONT● BOSA-on-Board ONU
● SFF/SFP & CSFP modules
GENERAL DESCRIPTION
A fully compliant SFF-8472 digital diagnostic monitoring solution can be realised by connecting an external 8k EEPROM. The GN25L95 features automatic mean power and automatic extinction ratio control functions for robust and reliable control of laser operating conditions over temperature. Auto-ranging A/D converters with digitized monitoring, an internal temperature sensor and an on-chip DAC for controlling an external APD bias circuit are also included.