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LT1457 - Dual, Precision JFET Input Op Amp

The LT1457 is a dual, JFET input op amp optimized for handling large capacitive loads in combination with precision performance. Precision specifications include 220µV offset voltage in plastic and surface mount packages. At 70°C input bias current is 50pA, input offset current is 20pA. Channel separation is 130dB. Other dual JFET input op amps from Linear Technology include the LT1057, which is three times faster than the LT1457 but at the expense of significantly lower capacitive load handling capability; and the LT1113 with 4.5nV/rt Hz voltage noise.

Features Handles 10,000pF Capacitive Load 450µV Max Offset Voltage 1200µV Max Offset Voltage in S8 Package 50pA Bias Current at 70°C 13nV/ rt Hz Voltage Noise 4V/µs Slew Rate 4µV/°C Drift 130dB Channel Separation Typical Application

Applications Sample-and-Hold (Drives Large Hold Capacitors) A/D and D/A Converters Photodiode Amplifiers Voltage-to-Frequency Converters Packaging