Overview
The LF412ACN/NOPB is a low offset, low drift dual JFET input operational amplifier produced by Texas Instruments. This device is part of the BI-FET II™ series, known for its very low input offset voltages and high input impedance. The LF412ACN/NOPB is designed to operate with a wide range of supply voltages and is suitable for various high-performance applications requiring low noise and high stability.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Input Offset Voltage | 0.5 mV (Typ), 2 mV (Max) | V_S = ±15V, T_A = 25°C |
| Input Offset Voltage Drift | 7 µV/°C (Typ) | V_S = ±15V |
| Input Bias Current | 50 pA (Typ), 200 pA (Max) | V_S = ±15V, T_A = 25°C |
| Supply Voltage Range | ±5V to ±22V | |
| Bandwidth | 3 MHz (Typ) | V_S = ±15V, A_V = 1 |
| Slew Rate | 15 V/µs (Typ) | V_S = ±15V |
| Operating Temperature Range | 0°C to 70°C (Commercial), -55°C to 125°C (Military) | |
| Package Type | DIP8 |
Key Features
- Very low input offset voltage and drift, making it suitable for high-precision applications.
- High input impedance due to JFET input stage.
- Wide supply voltage range from ±5V to ±22V.
- High slew rate of 15 V/µs and bandwidth of 3 MHz.
- Low input bias current, approximately doubling for every 10°C increase in junction temperature.
- Internally trimmed for low offset voltage.
- Large reverse breakdown voltages from gate to source and drain, eliminating the need for clamps across the inputs.
Applications
- High-speed integrators and differentiators.
- Fast D/A converters and sample-and-hold circuits.
- Audio and video processing circuits requiring low noise and high stability.
- Medical and scientific instrumentation where precision and low drift are critical.
- Industrial control systems and automation.
Q & A
- What is the typical input offset voltage of the LF412ACN/NOPB?
The typical input offset voltage is 0.5 mV.
- What is the input offset voltage drift of the LF412ACN/NOPB?
The input offset voltage drift is typically 7 µV/°C.
- What is the supply voltage range for the LF412ACN/NOPB?
The supply voltage range is from ±5V to ±22V.
- What is the slew rate of the LF412ACN/NOPB?
The slew rate is typically 15 V/µs.
- What is the bandwidth of the LF412ACN/NOPB?
The bandwidth is typically 3 MHz.
- What are the operating temperature ranges for the LF412ACN/NOPB?
The operating temperature ranges are 0°C to 70°C for commercial and -55°C to 125°C for military grades.
- What type of package is the LF412ACN/NOPB available in?
The LF412ACN/NOPB is available in a DIP8 package.
- Why is the LF412ACN/NOPB suitable for high-precision applications?
It is suitable due to its very low input offset voltage and drift, high input impedance, and low input bias current.
- What precautions should be taken when using the LF412ACN/NOPB?
Precautions include ensuring proper power supply decoupling, careful lead dress and component placement, and avoiding reversed polarity power supply.
- What are some common applications of the LF412ACN/NOPB?
Common applications include high-speed integrators, fast D/A converters, sample-and-hold circuits, audio and video processing, and medical instrumentation.
