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Supertex ICs drive MEMS in optical networks

Posted: 25 Nov 2002 ?? ?Print Version ?Bookmark and Share

Keywords:supertex? hv256? hv257? amplifier array ic? mems driver?

Supertex Inc. has announced the release of the HV256 and HV257 32-channel, integrated amplifier array ICs that operate from a single 300V voltage supply and are designed to drive microelectromechanical systems (MEMS) in optical networking systems, such as optical cross-connect, switches, and tunable photonic modules.

Each channel of ICs is configured as a non-inverting amplifier with programmable external current limit protection, while the HV257 also features 32 S/H circuits that share a common analog input, which reduces the number of required input DACs.

Output voltage per channel can swing up to 295V providing wide movement for an optical MEMS with a typical slew rate of 2.0V/?s, providing sufficient switching time from one optical fiber line to another.

Available in 17-by23mm 100-lead MQFPs, the ICs also feature integrated high value gain setting resistors for an internal feedback path and have a maximum operating current of 25?A per channel. They also have an integrated diode included to facilitate monitoring of die temperature for external temperature compensation and thermal protection.

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