Qorvo's 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.
The TGA4861 is manufactured in a reliable high-speed SiGe process that combines excellent performance together with cost-effectiveness.
The TGA4861 complies with the OIF intradyne receiver MSA. The TGA4861 is a dual TIA and thus contains two TIA/AGC circuits on each die. In addition to the many features defined in the OIF MSA, the TGA4861, for example, also includes a versatile bandwidth tuning function.
|Differential Transimpedance Gain(ohm)||250 to 4,800|
|Differential Output Vpp(mV)||200 to 900|
|Equivalent Input Noise(pA/rtHz)||24|
This product appears in the following application block diagrams: