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LF411CN
+BOMIC OPAMP JFET 1 CIRCUIT 8DIP
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ManufacturerTexas Instruments
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Mfr. Part #LF411CN
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In Stock4841
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Specifications
| Attribute | Value |
| Series | BI-FET II™ |
| Part Status | Obsolete |
| Base Product Number | LF411 |
| Amplifier Type | J-FET |
| Number of Circuits | 1 |
| Slew Rate | 15V/µs |
| Gain Bandwidth Product | 4 MHz |
| Current - Input Bias | 50 pA |
| Voltage - Input Offset | 800 µV |
| Current - Supply | 1.8mA |
| Voltage - Supply Span (Min) | 10 V |
| Voltage - Supply Span (Max) | 36 V |
| Operating Temperature | 0°C ~ 70°C |
| Mounting Type | Through Hole |
| Package | 8-DIP (0.300", 7.62mm) |
| Supplier Device Package | 8-PDIP |
| Packaging | Tube |
Overview
Description
Key points:
- Suitable for instrumentation, active filters, integrators, and high-impedance sensor front-ends.
- Not rail-to-rail; typically requires dual supplies (or a properly biased single supply) and care with input/output headroom.
- Implemented in standard op-amp configurations (inverting, non-inverting) with external feedback; benefits from good supply decoupling.
For exact electrical specs (offset, bias current, gain, bandwidth, slew rate, supply voltage range, temperature range) and the precise pinout, consult the official datasheet from the manufacturer or distributors.
Equivalent
- TL081
- TL071
- LF351
For dual substitutes, LF353 is often used. Check the exact pinout and specs in the datasheet to ensure a proper pin-for-pin swap.
Features
- High-speed, low-noise JFET-input operational amplifier
- Very high input impedance (FET input)
- Very low input bias current (tens of pA typical)
- Low input offset voltage (typical ~1 mV; max ~3 mV)
- Gain-bandwidth product around 4 MHz; slew rate about 0.5–0.6 V/µs
- Internally compensated and unity-gain stable
- Wide supply voltage range (≈ ±3 V to ±18 V; 6–36 V total; supports single supply)
- Moderate output drive (~±10–20 mA) with output swing near the rails under light load
- Low noise and good offset drift for precision applications
- Temperature range typical for commercial/industrial grades (e.g., -40 °C to +85 °C)
- Package: 8-pin DIP (CN variant) and related plastic packages
Note: exact specs vary by lot and manufacturer revision.
Pinout
Manufacturer
Texas Instruments is a multinational American semiconductor company that designs, manufactures, and markets integrated circuits and other electronics components.
Application
- Instrumentation amplifiers and sensor conditioning (high input impedance, low bias)
- Active filters and general signal processing (second/third-order filters, notches)
- Data-acquisition front ends (buffering, impedance matching, anti-aliasing)
- Analog computing blocks (integrators, differentiators, summers, subtractors)
- Servo and control loops (error amplifiers, motor/position/velocity control)
- Audio/video preamplification and line-level gain stages
Note: use where high speed, wide bandwidth and low input bias are advantageous.
Package
Frequently Asked Questions
Q: What is the typical application for the LF411CN J-FET amplifier?
A: It is ideal for high-speed integrators, fast D/A converters, and precision sample-and-hold circuits due to its 15V/µs slew rate.
Q: Can this device operate with a single supply voltage?
A: Yes, it supports a supply range from 10V to 36V, allowing single-supply operation when properly biased.
Q: What is the input bias current of the LF411CN?
A: The typical input bias current is only 50 pA, ensuring minimal error in high-impedance signal applications.
Q: Is the LF411CN suitable for low-frequency audio applications?
A: Yes, with a 4 MHz gain bandwidth product and low offset voltage of 800 µV, it works well for precision audio processing.
Q: What package type does the LF411CN use?
A: It comes in a through-hole 8-DIP package (0.300", 7.62mm), compatible with standard breadboards and sockets.
Q: What is the operating temperature range for this component?
A: The LF411CN is rated for commercial operation from 0°C to 70°C, suitable for controlled-environment applications.
Q: Does the LF411CN require external compensation components?
A: No, it is internally compensated, simplifying PCB design and reducing external component count.
