LF155 Datasheet, PDF (15/23 Pages) National Semiconductor (TI) – JFET Input Operational Amplifiers

Typical Applications (Continued)
Wide BW Low Noise, Low Drift Amplifier
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• Parasitic input capacitance C1 . (3pF for LF155, LF156 and LF357 plus any additional layout capacitance) interacts with
feedback elements and creates undesirable high frequency pole. To compensate add C2 such that: R2 C2 . R1 C1.
Boosting the LF156 with a Current Amplifier
• I_OUT(MAX).150mA (will drive R_L≥ 100Ω)
• No additional phase shift added by the current amplifier
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