Texas Instruments LF257
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 input bias and offset currents/low offset voltage and offset voltage drift, coupled with offset adjust, which does not degrade drift or common-mode rejection.| Part No. | LF257 |
|---|---|
| Datasheet | LF257 Download |
| Manufacturer |  Texas Instruments |
| Description | JFET Input Operational Amplifiers |
| Buy | Stock & Price |
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 NoiseAPPLICATIONS
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 B...
