LF356N/NOPB: JFET input operational amplifier, 5MHz, ±15V, low noise
Texas Instruments

The LF356N/NOPB is a monolithic JFET input operational amplifier that integrates well-matched, high-voltage JFETs and standard bipolar transistors on the same chip. This operational amplifier is designed for low input bias and offset currents, coupled with low offset voltage and offset voltage drift. It also features internal compensation and a large differential input voltage capability, making it suitable for a wide range of applications.

The LF356N/NOPB offers a slew rate of 12 V/µs and a gain bandwidth product of 5 MHz, making it ideal for high-speed integrators, fast D/A and A/D converters, and other precision applications. Its high input impedance (10¹² Ω) and low noise characteristics make it excellent for low noise applications, whether using high or low source impedance. Additionally, the new output stage allows the use of large capacitive loads (5,000 pF) without stability problems.

Key Specifications and Features

  • Supply Voltage (VS): ±15 V
  • Slew Rate (SR): 12 V/µs
  • Gain Bandwidth Product (GBW): 5 MHz
  • Input Bias Current: 30 pA
  • Input Offset Current: 3 pA
  • Input Noise Voltage: 12 nV/√Hz
  • High Input Impedance: 10¹² Ω
  • Large DC Voltage Gain: 106 dB
  • High Common-Mode Rejection Ratio (CMRR): 100 dB

LF356N/NOPB Datasheet

LF356N/NOPB datasheet (PDF)

LF356N/NOPB Substitutes
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Applications

  • Precision High-Speed Integrators
  • Fast D/A and A/D Converters
  • High Impedance Buffers
  • Wideband, Low Noise, Low Drift Amplifiers
  • Logarithmic Amplifiers
  • Photocell Amplifiers
  • Sample and Hold Circuits

Category

Operational Amplifier

General information

Operational amplifiers (op-amps) are fundamental components in modern electronic circuits, used extensively for signal conditioning, filtering, and performing mathematical operations such as addition, subtraction, integration, and differentiation. The JFET input operational amplifiers, such as the LF356N/NOPB, offer high input impedance and low noise, making them particularly suitable for high fidelity and precision applications.

When selecting an op-amp, engineers should consider factors such as gain bandwidth product, slew rate, input impedance, and noise characteristics. These parameters determine the op-amp's ability to amplify signals without distortion or loss of information. For applications requiring high-speed signal processing, op-amps with high slew rates and gain bandwidth products are preferred. Low noise is crucial for applications where signal integrity is paramount.

The LF356N/NOPB stands out due to its integration of JFETs and bipolar transistors, offering advantages in terms of noise performance and input impedance. Its ability to handle large capacitive loads without stability issues further broadens its application scope. This op-amp is an excellent choice for designers looking for a balance between speed, precision, and noise performance.

In summary, the selection of an op-amp is a critical step in the design process, influencing the overall performance and efficiency of electronic circuits. The LF356N/NOPB, with its specific set of characteristics, caters to a wide range of applications, from precision analog processing to high-speed digital conversion.

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