TGA4861

TGA4861 13 Gb/s Linear Transimpedance Amplifier with AGC Applications  40G DP-QPSK (Dual Polarization QPSK)  TIA with AGC for long-haul or metro optical receiver modules  Coherent systems with a baud rate of up to 44.6Gbps Product Features  Excellent linearity and low total harmonic distortion of <1% for Vout,se<350mVpp  Able to handle large DC input currents  Tunable frequency response of 8.5-13.5 GHz  Large dynamic range of 26dB typical  Manual gain or AGC mode selectable  Multiple amplifier stages to achieve high gain  Output shutdown function  Peak level detection  Input signal strength indicator (optional)  Dual TIA die with +3.3V single supply voltage  Compliant with OIF intradyne receiver MSA  SiGe technology with ƒT/ƒmax of 170/250 GHz General Description The TGA4861 is a state of the art TIA with integrated AGC designed for coherent DP-QPSK receivers with baud rates up to 44.6Gbps. It features a very low total harmonic distortion which is not only crucial for DP-QPSK, but also enables higher-level QAM applications. In addition, the TGA4861 features two compensating circuits that allow it to handle large DC input currents as well as large offsets between these currents. This is, among others, important for colorless applications. 1.4 x 1.6 mm2 die Block Diagram (one channel) THD The TGA4861 is manufactured in a reliable highspeed SiGe process that combines excellent performance together with cost-effectiveness. The TGA4861 complies with the OIF intra...