The SX1125A is an integrated limiting amplifier for high frequency fiber optic applications. The device interfaces directly to the trans–impedance amplifier of a typical optical to electrical conversion portion of a fiber optic link. With data rate capabilities in the 622Mb/s range, the high gain limiting amplification of the SX1125A is ideal for high speed fiber optic applications like SONET/SDM, ATM, FDDI, Fibre Channel or Serial Hippi. The device is functionally and pin compatible to the Signetics SA5225 with a significantly higher bandwidth. The CAZP and CAZN inputs to the limiting amplifier provide an auto-zero function to effectively cancel any input offset voltage present in the amplifier.

• Wideband Operation: 20kHz to 550MHz
• Programmable Input Signal Level Detection
• Operation with single +5V or standard ECL supply
• Standard 16-lead SOIC Package
• Fully Differential Design to Minimize Noise Affects
• 10KH Compatible