Overview
The LF356MX/NOPB is a high-performance JFET input operational amplifier produced by Texas Instruments. This device is part of the LFx5x series, which integrates well-matched, high-voltage JFETs with standard bipolar transistors using BI-FET™ Technology. The LF356 is known for its low input bias and offset currents, low offset voltage, and low offset voltage drift. It also features an offset adjust mechanism that does not degrade drift or common-mode rejection. The amplifier is designed for high slew rate, wide bandwidth, extremely fast settling time, and low noise characteristics, making it suitable for a variety of high-speed and precision applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | ±15 to ±20 | V |
| Differential Input Voltage | ±30 | V |
| Input Bias Current | 30 pA | pA |
| Input Offset Current | 3 pA | pA |
| Input Noise Current | 0.01 pA/√Hz | pA/√Hz |
| Common-Mode Rejection Ratio | 100 dB | dB |
| Large Signal Voltage Gain | 106 dB | dB |
| Slew Rate | 12 V/μs | V/μs |
| Gain Bandwidth | 5 MHz | MHz |
| Settling Time to 0.01% | 1.5 μs | μs |
| Operating Temperature Range | 0 to 70 | °C |
| Package Type | SOIC (D) with 8 pins |
Key Features
- Low Input Bias Current: 30 pA, making it suitable for low noise applications.
- High Input Impedance: 10^12 Ω, ensuring minimal signal loss.
- High Common-Mode Rejection Ratio: 100 dB, providing excellent common-mode noise rejection.
- Large DC Voltage Gain: 106 dB, offering high amplification capabilities.
- Fast Slew Rate: 12 V/μs, enabling rapid response to input changes.
- Wide Gain Bandwidth: 5 MHz, supporting high-frequency applications.
- Low Input Noise Voltage: 12 nV/√Hz, minimizing noise in the output signal.
- Internal Compensation and Large Differential Input Voltage Capability: Allows for large capacitive loads without stability issues.
- Offset Adjust Mechanism: Does not degrade drift or common-mode rejection.
Applications
- Precision High-Speed Integrators: The LF356's fast settling time and high slew rate make it ideal for integration in high-speed circuits.
- Fast D/A and A/D Converters: Its low noise and high bandwidth characteristics are beneficial in data conversion applications.
- High Impedance Buffers: The high input impedance of the LF356 makes it suitable for buffering high-impedance sources.
- Replace Expensive Hybrid and Module FET Op Amps: The LF356 offers a cost-effective alternative to more expensive hybrid and module FET operational amplifiers.
- Low Drift Adjustable Voltage References: The device's low drift and offset characteristics make it suitable for precision voltage reference applications.
Q & A
- What is the supply voltage range for the LF356MX/NOPB?
The supply voltage range is ±15 to ±20 V.
- What is the slew rate of the LF356MX/NOPB?
The slew rate is 12 V/μs.
- What is the gain bandwidth of the LF356MX/NOPB?
The gain bandwidth is 5 MHz.
- What is the input bias current of the LF356MX/NOPB?
The input bias current is 30 pA.
- What is the common-mode rejection ratio (CMRR) of the LF356MX/NOPB?
The CMRR is 100 dB.
- What is the operating temperature range for the LF356MX/NOPB?
The operating temperature range is 0 to 70°C.
- What type of package does the LF356MX/NOPB come in?
The device comes in an SOIC (D) package with 8 pins.
- What are some typical applications of the LF356MX/NOPB?
Typical applications include precision high-speed integrators, fast D/A and A/D converters, high impedance buffers, and low drift adjustable voltage references.
- How does the offset adjust mechanism work in the LF356MX/NOPB?
The offset adjust mechanism does not degrade drift or common-mode rejection, ensuring precise and stable operation.
- What are the advantages of using JFET input devices in the LF356MX/NOPB?
The JFET input devices provide low input bias current, high input impedance, and low noise, making them ideal for low noise applications.
