The RH1028 (gain of -1 stable) /RH1128 (gain of +1 stable) achieve a new standard of excellence in noise performance with 0.9nV/√Hz 1kHz noise, 1.0nV/√Hz 10Hz noise. This ultralow noise is combined with excellent high speed speci?cations (gain-bandwidth product is 75MHz for RH1028, 20MHz for RH1128), distortion-free output, and true precision parameters (0.25ΜV/°C drift, 20ΜV offset voltage, 25 million voltage gain). Although the RH1028/RH1128 input stage operates at nearly 1mA of collector current to achieve low voltage noise, input bias current is only 50nA. The RH1028/RH1128's voltage noise is less than the noise of a 50O resistor. Therefore, even in very low source impedance transducer or audio amplifier applications, the RH1028/RH1128's contribution to total system noise will be negligible.
