The TIA provides linear, low noise amplification from 0. The trans-impedance is controlled from 150 to 4k via an external pad and the gain is automatically adjusted to provide a constant output voltage swing. The MATA-05819B Linear TIA is intended for 50G, 100G, 200G and 400G receivers using multilevel modulation such as PAM4. More data per optical symbol compared to older technologies Powering the fastest networks on. TeraSignal, has launched the TS9801/02, which it claims is the world's first quad 200G PAM-4 linear Transimpedance Amplifier (TIA) with TSLink TM Digital Eye Monitoring (DEM) and adaptive equalisation. The single ended input stage is required for applica-tions where the current source is inherently grounded externally.