TGA4871
Quad Limiting Transimpedance Amplifier
Qorvo's TGA4871 is four transimpedance amplifiers, each with a single-ended input and a differential output, designed for 100GBASE-LR4/ER4 per IEEE802.3b. The low input referred noise density of 15 pA/ square root Hz combined with the differential transimpedance gain of 6 k-ohms leads to an excellent receiver sensitivity. The amplifiers can handle large input signals of up to 2 mApp. Each TIA in the TGA4871 includes an automatic threshold adjust to cancel DC offsets. This results in output signals with distortion free eye diagrams. An external current source or potentiometer can be used to further optimize the threshold. The differential output voltage of 990 mVpp provides a good match to the next part of the receive chain. The TGA4871 is powered by a single +3.3 V power supply
Key Features
- Quad limiting transimpedance amplifier
- Single ended input / differential output
- Tunable bandwidth response 16-30 GHz
- Input noise current 15pA/square root Hz
- Limiting: 6 k-ohm transimpedance (single ended to differential)
- 900mVpp differential output voltage
- High input current overload of 2 mApp
- On-chip photodetector biasing
- Single supply operation +3.3 V
- Configurable power dissipation 400 to 850 mW for four TIAs
- Die size: 1.56 mm x 3.26 mm x 0.275 mm
Typical Applications
- 100GBASE-LR4/ER4
Parameters
Need more support?
At Qorvo, our customers are a core part of what we do, and we want every experience you have with us to be as reliable as our products. If you have a question or if something isn't working the way you expect, please let us know.
Forum
Engage with the Qorvo community, ask technical questions and share insights.
Support
Get technical, application or customer support plus updates on supply chain and FAQs.
Sales
Connect with our sales team to gain tailored solutions, expert guidance and access to the latest technologies.
