ltc6268

I'm using LTC6268-10 to build a ~200MHz TIA (Transimpedance amplifier) Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/626810f.pdf Here is the schematic: The frequency response I get: I expect the bandwidth to only roll off at 250MHz, why does it fall to -3dB...

edit: I'm trying to study about a transimpedance amplifier (TIA). I'm using LTC6268-10 op-amp configured as TIA. I'm using it to get power readings from a 1310nm photodiode, which I'm reverse biasing it in TIA. Datasheet of op-amp I'm using: link...