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Ultra Low Noise Precision High Speed Op Amps
Linear Technology Inc.
Description
The LT1028(gain of –1 stable)/LT1128(gain of +1 stable) achieve a new standard of excellence in noise performance with 0.85nV/Rt.Hz 1kHz noise, 1.0nV/Rt.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 50 Ohm 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/rt Hz Max. at 1kHz 0.85nV/rt Hz Typ. at 1kHz 1.0nV/ rtHz Typ. at 10Hz 35nVP-P Typ., 0.1Hz to 10Hz 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. Voltage and Current Noise 100% Tested Available in 8-Pin SO Package
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