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using LTC6268 as a TIA, but has a sinusoidal waveform which is 300Mhz in the output port

Category: Hardware
Product Number: LTC6268

Dear Sir,

   Using LTC6268 as a transimpedance amplifier (photodiode mode), with V+ as the 5V power supply, V- as GND, the non-inverting input connected to a 1.25V reference source, and the inverting input connected to the positive terminal of the photodiode. Rf is 9.09MΩ. Currently, a sinusoidal waveform of around 300MHz with an amplitude of 100mVpp is measured at the output. Below is the schematic and oscilloscope waveform could you help for analysing why this happened?