Analog Devices / Maxim Integrated DS1878 SFP+ Controllers
Analog Devices DS1878 Controllers are small form factor pluggable (SFP+) controllers with a digital laser diode driver (LDD) interface. The state machine-based device implements SFF-8472 without software development. The DS1878 Controller from Analog Devices monitors six analog channels: temperature, VCC, and MON1 to MON4, with MON3 being differential with support for the common mode to VCC.
Features
- Meets all SFF-8472 control and monitoring requirements
- Laser bias controlled by APC loop and temperature LUT to compensate for tracking error
- Laser modulation controlled by temperature LUT
- Six analog monitor channels: temperature, VCC, MON1-MON4
- MON1-MON4 Support internal and external calibration
- Scalable dynamic range
- Internal direct-to-digital temperature sensor
- Alarm and warning flags for all monitored channels
- Two 9-bit delta-sigma outputs with 36 entry temperature LUTs
- Digital I/O pins: five inputs, four outputs
- Comprehensive fault-measurement system with maskable laser shutdown capability
- Flexible, two-level password scheme provides three levels of security
- 256 Additional bytes located at A0h slave address
- I²C-Compatible interface
- 3-Wire master at communicating with a maxim laser driver/limiting amplifier
- +2.85V to +5.5V Operating voltage range
- -40°C to +95°C Operating temperature range
- 28-Pin TQFN (5mm x 5mm x 0.75mm) package
Publié le: 2012-01-18
| Mis à jour le: 2023-04-13