A low noise amplifier for radio frequency integrated circuits having an adaptive input and operating mode selection. The low noise amplifier comprises two inputs which can be operated in different configurations. The operating mode may be chosen in such way that the inputs are used respectively one at the time for single-ended configuration or both inputs are used for differential configuration. Additionally, in single-ended operation, inputs can be matched to different frequencies. The information regarding the operating mode is obtained from an external component. The operating mode to be used may be determined when the device using a particular radio frequency integrated circuit is designed or it can be determined dynamically by the device using the radio frequency integrated circuit.