Maxim intros SFP+ optical module controller for optical video
JUNE 10, 2010 --Maxim Integrated Products (NASDAQ: MXIM) has introduced the DS1876, an SFP+ video controller with a dual laser diode driver (LDD) interface. The device is designed to control and monitor all transmitter functions for SFP+ MSA optical modules and fully support the SFF-8472 specification.
The DS1876 controls two laser drivers to enable low-cost implementation of modules supporting SDI digital video and other optical video applications. The chip gives customers all necessary control and monitoring functionality in a single device, thus saving the expense of two microcontrollers as well as complex software development, Maxim says.
Automatic power control (APC) and laser modulation are controlled through four temperature-driven look-up tables (LUTs) featuring 10-bit delta-sigma DAC outputs with an independent 72-entry LUT for each output. The DS1876 monitors six analog channels: temperature, Vcc, and transmit power and bias current for each of the two laser drivers. It also provides an I2C-compliant interface to the host system.
The DS1876 is fully specified over the -40 degrees Celsius to +95 degrees Celsius temperature range, says Maxim, and is available in a 5x5-mm 28-pin TQFN package. Pricing begins at $1.75 (1000-up, FOB USA).
A data sheet for the device can be found on the company’s site.
