Overview
The LM318PSR, produced by Texas Instruments, is a high-performance operational amplifier designed for applications requiring wide bandwidth and high slew rates. This device is part of the LM318 series, which includes the LM118 and LM218, although the LM118 and LM218 are now obsolete. The LM318PSR is a single, 40-V operational amplifier that offers a significant increase in speed over general-purpose operational amplifiers without compromising DC performance.
It features internal unity-gain frequency compensation, which simplifies its application by eliminating the need for external components. However, external frequency compensation can be added for optimum performance. The LM318PSR is available in several package options, including SOIC-8 and PDIP-8, making it versatile for various design needs.
Key Specifications
| Parameter | Typical Value | Minimum Value | Maximum Value | Unit |
|---|---|---|---|---|
| Supply Voltage Range | ±15 V | ±5 V | ±20 V | V |
| Input Offset Voltage | 2 mV | 0 mV | 10 mV | mV |
| Input Offset Current | 50 nA | 6 nA | 200 nA | nA |
| Input Bias Current | 250 nA | 120 nA | 500 nA | nA |
| Unity-Gain Bandwidth | 15 MHz | 15 MHz | - | MHz |
| Slew Rate at Unity Gain | 70 V/µs | 50 V/µs | - | V/µs |
| Common-Mode Input Voltage Range | ±11.5 V | - | - | V |
| Maximum Peak Output Voltage Swing | ±12 V | - | - | V |
| Supply Current | 8 mA | 5 mA | 10 mA | mA |
Key Features
- High Speed and Bandwidth: The LM318PSR offers a unity-gain bandwidth of 15 MHz and a slew rate of up to 70 V/µs, making it suitable for high-speed applications.
- Internal Frequency Compensation: The amplifier has internal unity-gain frequency compensation, simplifying its use without the need for external components.
- External Frequency Compensation Option: For optimal performance, external frequency compensation can be added.
- Input and Output Overload Protection: The device includes input and output overload protection features.
- Low Input Offset Voltage and Current: The LM318PSR has a low input offset voltage and current, ensuring high accuracy in applications.
- Wide Supply Voltage Range: It operates over a supply voltage range of ±5 V to ±20 V.
Applications
- A/D Converters: The high speed and fast settling time make the LM318PSR useful in analog-to-digital converters.
- Oscillators: It is suitable for oscillator circuits due to its high bandwidth and slew rate.
- Active Filters: The LM318PSR can be used in active filter designs requiring high frequency response.
- Sample-and-Hold Circuits: Its fast settling time is beneficial in sample-and-hold circuits.
- General-Purpose Amplifiers: It can be used in various general-purpose amplifier applications where high speed and accuracy are required.
Q & A
- What is the typical unity-gain bandwidth of the LM318PSR?
The typical unity-gain bandwidth of the LM318PSR is 15 MHz.
- What is the slew rate of the LM318PSR at unity gain?
The slew rate of the LM318PSR at unity gain is typically 70 V/µs, with a minimum of 50 V/µs.
- What is the input offset voltage of the LM318PSR?
The input offset voltage of the LM318PSR is typically 2 mV, with a maximum of 10 mV.
- What is the supply voltage range for the LM318PSR?
The LM318PSR operates over a supply voltage range of ±5 V to ±20 V.
- Does the LM318PSR have internal frequency compensation?
Yes, the LM318PSR has internal unity-gain frequency compensation, but external compensation can also be added for optimal performance.
- What are some common applications of the LM318PSR?
The LM318PSR is commonly used in A/D converters, oscillators, active filters, sample-and-hold circuits, and general-purpose amplifiers.
- What package options are available for the LM318PSR?
The LM318PSR is available in SOIC-8 and PDIP-8 package options.
- What is the maximum peak output voltage swing of the LM318PSR?
The maximum peak output voltage swing of the LM318PSR is ±12 V when the supply voltage is ±15 V and the load resistance is 2 kΩ.
- Does the LM318PSR have input and output overload protection?
Yes, the LM318PSR includes input and output overload protection features.
- What is the common-mode input voltage range for the LM318PSR?
The common-mode input voltage range for the LM318PSR is ±11.5 V when the supply voltage is ±15 V.
