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Hi， 1MHz signal, G=100, so the GBW is at least 100Mhz. As we don't know what other electric characters are, for example, power supply range, Vos, input noise.etc, below link are the results of low noise, 1000M<GBW<100M, one channel amplifiers. You could select it according to your detailed need: www.ti.com/.../products.html
