LF155
Overview
The LFx5x devices are the first monolithic JFET input operational amplifiers to incorporate well-matched, high-voltage JFETs on the same chip with standard bipolar transistors (BI-FET™ Technology). These amplifiers feature low.
- 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)
