DS1875 Description
The DS1875 controls and monitors all functions for burstmode transmitters, APD receivers, and video receivers. It also includes a power-supply controller for APD bias generation, and provides all SFF-8472 diagnostic and monitoring functionality. The bined solution of the DS1875 and the MAX3643 laser driver provides APC loop, modulation current control, and eye safety functionality.
DS1875 Key Features
- Meets All PON Burst-Timing Requirements for Burst-Mode Operation
- Laser Bias Controlled by APC Loop and Temperature Lookup Table (LUT)
- Laser Modulation Controlled by Temperature LUT
- Six Total DACs: Four External, Two Internal
- Two 8-Bit DACs, One of Which is Optionally Controlled by MON4 Voltage
- Internal 8-Bit DAC Controlled by a TemperatureIndexed LUT
- PWM Controller
- Boost or Buck Mode
- Boost Mode: Uses Optional External ponents, Up to 90V Bias Generation
- 131kHz, 262kHz, 525kHz, or 1050kHz SelectableSwitching Frequency