LF356

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LF155, LF156, LF256, LF257 LF355, LF356, LF357 SNOSBH0D – MAY 2000 – REVISED NOVEMBER 2015 LFx5x JFET Input Operational Amplifiers 1 Features 1 Advantages – Replace Expensive Hybrid and Module FET Op Amps – Rugged JFETs Allow Blow-Out Free Handling Compared With MOSFET Input Devices – Excellent for Low Noise Applications Using Either High or Low Source Impedance—Very Low 1/f Corner – Offset Adjust Does Not Degrade Drift or Common-Mode Rejection as in Most Monolithic Amplifiers – New Output Stage Allows Use of Large Capacitive Loads (5,000 pF) Without Stability Problems – Internal Compensation and Large Differential Input Voltage Capability Common Features – Low Input Bias Current: 30 pA – Low Input Offset Current: 3 pA – High Input Impedance: 1012 Ω – Low Input Noise Current: 0.01 pA/√Hz – High Common-Mode Rejection Ratio: 100 dB – Large DC Voltage Gain: 106 dB Uncommon Features – Extremely Fast Settling Time to 0.01%: – 4 μs for the LFx55 devices – 1.5 μs for the LFx56 – 1.5 μs for the LFx57 (AV = 5) – Fast Slew Rate: – 5 V/µs for the LFx55 – 12 V/µs for the LFx56 – 50 V/µs for the LFx57 (AV = 5) – Wide Gain Bandwidth: – 2.5 MHz for the LFx55 devices – 5 MHz for the LFx56 – 20 MHz for the LFx57 (AV = 5) – Low Input Noise Voltage: – 20 nV/√Hz for the LFx55 – 12 nV/√Hz for the LFx56 – 12 nV/√Hz for the LFx57 (AV = 5) 2 Applications Precision High-Speed Integrators Fast D/A and ...