Other Parts Discussed in Thread: OPA857, LMH13000, THS6222
Tool/software:
Dear Texas Instruments Team,
I hope you are doing well.
We are developing a LiFi communication system and currently use the OPA857 as the transimpedance amplifier in our receiver, paired with the SFH2400Z photodiode. The receiver side works reliably for data rates up to 10 Mbps and we aim to scale this to 100 Mbps in the next phase.
On the transmitter side, we are using an FPGA to generate an OOK-modulated digital signal. Initially, we interfaced this signal through a Bias-T circuit to drive an IR LED. However, we are observing signal drooping and distortion at the receiver side, indicating that the LED is not being driven optimally at high speed.
We are now looking for a suitable **high-speed LED driver or amplifier IC** that:
- Accepts single-ended logic-level signals (preferably 3.3V CMOS from the FPGA)
- Can support frequencies of at least 100 MHz
- Is optimized for IR LED driving and OOK modulation
- Works well in a LiFi system with OPA857-based receivers
We would appreciate your recommendation for:
1. Suitable TI ICs for this application
2. Reference designs or evaluation boards for such LED drivers
3. Design guidance on matching impedance and minimizing signal distortion
Thank you for your support, and we look forward to integrating a TI solution in our high-speed optical communication system.
Best regards,
Chirag Chauhan
Sr. Hardware Engineer
