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Optical module controller boasts dual digital LDD interface

Thu, 06/10/2010 - 9:31am

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MAXDS1876Maxim Integrated Products introduces the DS1876, an SFP+ video controller with a dual laser diode driver (LDD) interface. This device controls and monitors all transmitter functions for SFP+ optical modules and fully supports 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. This solution gives customers all necessary control and monitoring functionality in a single chip, thus saving the expense of two microcontrollers as well as complex software development

Automatic power control (APC) and laser modulation is 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, and is available in a 5mm x 5mm 28-pin TQFN package. Pricing begins at $1.75 (1000-up, FOB USA).

Maxim Integrated Products is a publicly traded company that designs, manufactures, and sells high-performance semiconductor products. The Company was founded over 25 years ago with the mission to deliver innovative analog and mixed-signal engineering solutions that add value to its customers' products. To date, it has developed over 6300 products serving the industrial, communications, consumer, and computing markets.

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