DESCRIPTION
The LT®1028(gain of –1 stable)/LT1128(gain of +1 stable) achieve a new standard of excellence in noise performance with 0.85nV/√Hz 1kHz noise, 1.0nV/√Hz 10Hz noise. This ultralow noise is combined with excellent high speed specifications (gain-bandwidth product is 75MHz for LT1028, 20MHz for LT1128), distortion-free output, and true precision parameters (0.1µV/°C drift, 10µV offset voltage, 30 million voltage gain). Although the LT1028/LT1128 input stage operates at nearly 1mA of collector current to achieve low voltage noise, input bias current is only 25nA.
The LT1028/LT1128’s voltage noise is less than the noise of a 50Ω resistor. Therefore, even in very low source impedance transducer or audio amplifier applications, the LT1028/LT1128’s contribution to total system noise will be negligible.

FEATURES
■ Voltage Noise
   1.1nV/√Hz Max at 1kHz
   0.85nV/√Hz Typ at 1kHz
   1.0nV/√Hz Typ at 10Hz
   35nVP-P Typ, 0.1Hz to 10Hz
■ Voltage and Current Noise 100% Tested
■ Gain-Bandwidth Product
   LT1028: 50MHz Min
   LT1128: 13MHz Min
■ Slew Rate
   LT1028: 11V/µs Min
   LT1128: 5V/µs Min
■ Offset Voltage: 40µV Max
■ Drift with Temperature: 0.8µV/°C Max
■ Voltage Gain: 7 Million Min
■ Available in 8-Pin SO Package

APPLICATIONS
■ Low Noise Frequency Synthesizers
■ High Quality Audio
■ Infrared Detectors
■ Accelerometer and Gyro Amplifiers
■ 350Ω Bridge Signal Conditioning
■ Magnetic Search Coil Amplifiers
■ Hydrophone Amplfiers