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Privately-held communications IC maker Ensphere Solutions today announced the availability of a power-optimized 10G transceiver IC (ESI-1002) and laser diode shunt driver IC (ESI-1010). The pairing minimizes power dissipation in 10G optical modules for 10G Ethernet, 4G phone, and 8G Fiber Channel devices.
The ESI 1002 device includes elaborate circuitry to monitor key parameters such as system supply voltage, temperature, laser bias and modulation currents, transmit power levels, and many other key parameters. The device can also be used to drive FP/DFB lasers in conjunction with an external driver such as ESI-1010. ESI-1002 can drive VCSELs with up to 28mA modulation current. A complete system will have a power dissipation of less than 800mW, including the laser current.
ESI-1010 is a single channel 10G laser diode driver (LDD) able to support a wide variety of laser RC time constants. It is capable of supplying up to 100 mA of bias and 50 mA of modulation currents. In a shunt configuration, ESI-1010 assumes the heavy burden of driving a low impedance laser diode while presenting a 50Ω load to the preceding driver which is far easier to drive. This configuration reduces the overall power dissipation of the system dramatically. ESI-1010 is implemented in a low power CMOS technology and has a power dissipation of only 50 mW. This device is available in die form and can be installed in constricted spaces adjacent to the actual FP/DFB laser.
Hessam Mohajeri, Ensphere’s CEO, said the 10G pair were “defined and developed in close cooperation with leading optical module vendors and are being shipped in volume.”
“Aside from low power dissipation, their key differentiation is the fact that they have been part of real live networks and have passed the test of time with flying colors,” he added.
These two products are in volume production and are priced at $5 in high volumes.
Based in Silicon Valley, Ensphere Solutions Inc., is a fabless semiconductor company specializing in the development of standard and custom mixed signal transceivers and RF chips. The company’s standard products are targeted for high-speed optical data communications.