Overview
The LF411CP is a JFET-input operational amplifier produced by Texas Instruments. It is a low-cost, high-speed device known for its very low input offset voltage and guaranteed input offset voltage drift. The LF411CP is designed to operate with low supply current while maintaining a large gain-bandwidth product and a fast slew rate. It is pin-compatible with the standard LM741, allowing designers to upgrade the performance of existing designs easily.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC+) | 3.5 | 18 | V | |
| Supply Voltage (VCC-) | -3.5 | -18 | V | |
| Operating Free-Air Temperature (TA) | 0 | 70 | °C | |
| Input Offset Voltage (VIO) | 0.8 | 2 | mV | |
| Average Temperature Coefficient of Input Offset Voltage (αVIO) | 10 | 20 | µV/°C | |
| Input Offset Current (IIO) | 25 | 100 | pA | |
| Input Bias Current (IIB) | 50 | 200 | pA | |
| Slew Rate (SR) | 8 | 13 | V/µs | |
| Unity-Gain Bandwidth (B1) | 2.7 | 3 | MHz | |
| Equivalent Input Noise Voltage (Vn) | 18 | nV/√Hz | ||
| Equivalent Input Noise Current (In) | 0.01 | pA/√Hz |
Key Features
- Low input offset voltage: 0.8 mV (typ), 2 mV (max)
- Low input offset voltage drift: 10 µV/°C (typ), 20 µV/°C (max)
- Low input bias current: 50 pA (typ)
- Low input noise current: 0.01 pA/√Hz (typ)
- High input impedance: 10^12 Ω (typ)
- Wide gain-bandwidth product: 2.7 MHz (min)
- High slew rate: 8 V/µs (min), 13 V/µs (typ)
- Low supply current: 1.8 mA (typ)
- Pin-compatible with LM741
Applications
The LF411CP is suitable for a variety of high-performance applications, including:
- High-speed integrators
- Fast digital-to-analog converters
- Sample and hold circuits
- Other circuits requiring low input offset voltage and drift, low input bias current, high input impedance, high slew rate, and wide bandwidth.
Q & A
- What is the typical input offset voltage of the LF411CP?
The typical input offset voltage is 0.8 mV.
- What is the maximum input offset voltage drift for the LF411CP?
The maximum input offset voltage drift is 20 µV/°C.
- What is the typical input bias current of the LF411CP?
The typical input bias current is 50 pA.
- What is the slew rate of the LF411CP?
The slew rate is 8 V/µs (min) and 13 V/µs (typ).
- What is the unity-gain bandwidth of the LF411CP?
The unity-gain bandwidth is 2.7 MHz (min).
- Is the LF411CP pin-compatible with other operational amplifiers?
Yes, it is pin-compatible with the LM741.
- What are the operating temperature ranges for the LF411CP?
The operating temperature ranges are 0°C to 70°C for the LF411C and –40°C to 85°C for the LF411I.
- What is the maximum supply voltage for the LF411CP?
The maximum supply voltage is ±18 V.
- What is the typical supply current of the LF411CP?
The typical supply current is 1.8 mA.
- What are some common applications of the LF411CP?
Common applications include high-speed integrators, fast digital-to-analog converters, sample and hold circuits, and other high-performance circuits.
