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THS3091: Sensitivity from Opamps

Part Number: THS3091
Other Parts Discussed in Thread: THS3061, , THS3491, TINA-TI

Good day,

Busy with a design to use THS versions of IC, I come across contradiction in the data sheet

On hand have the THS3091 and the THS3061, real live measuring and comparing with the data sheet I found that the parameters for input offset are not valid for selecting parts and not useful.

The case:

Opamps both with +12V and -12V power supply

Input signal: 60 MHz 17mV

1) THS3091 give 8.6 mV with a gain 5 means reduction in signal although in the data sheet is mentioned 3 mV offset voltage

2)THS3061 give 53.2 mV with a gain of 10 the data sheet give +/- 4.4 mV

My question is: how to select opamps from TI who are sensitive enough to start with a very low input signal

Greetings,

Ronald