What is the gain bandwidth product of the IC LTC6269/LTC6268 ?

Question

The Datasheet specifies that the GBW is 500MHz but the datasheet also specifies that -3dB bandwidth at A = 1 is 350MHz, and in page number 9 the Gain and Phase vs Frequency graph 
 The frequency at gain = 0dB is about 300MHz and 400MHz respectively So when I am designing a TIA using LTC6268/LTC6269 what should I consider the GBW of this IC as?

GlenBrisebois · Accepted Answer

Hi Agumbe: the 500MHz Gain Bandwidth Product is specified at 10MHz. That means the open loop gain at 10MHz is 50. The number you would use in your calculations depends on what bandwidth you are trying to achieve. If you are trying to achieve medium high bandwidths like 10MHz, then use the higher number. But if you are targeting high bandwidths, use the lower number.)

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What is the gain bandwidth product of the IC LTC6269/LTC6268 ?