The LM118, LM218, and LM318 are precision, fast operational amplifiers designed for applications requiring wide bandwidth and high slew rate. They feature a factor-of-ten increase in speed over general-purpose devices without sacrificing dc performance. These operational amplifiers have internal unity-gain frequency compensation. This considerably simplifies their application, since no external components are necessary for operation. However, unlike most internally compensated amplifiers, external frequency compensation may be added for optimum performance. For inverting applications, feed-forward compensation boosts the slew rate to over 150 V/µs and almost double the bandwidth. Overcompensation can be used with the amplifier for greater stability when maximum bandwidth is not needed. Further, a single capacitor may be added to reduce the settling time for 0.1% error band to under 1 µs. The high speed and fast settling time of these operational amplifiers make them useful in A/D converters, oscillators, active filters.
This document provides a technical overview of the Texas Instruments LM118, LM218, and LM318 fast general-purpose operational amplifiers. These devices are designed for applications requiring wide bandwidth and high slew rate, featuring internal unity-gain frequency compensation to simplify circuit design without external components.
The datasheet details three distinct models characterized for different operating temperature ranges: the LM118 (-55°C to 125°C), the LM218 (-25°C to 85°C), and the LM318 (0°C to 70°C). It includes comprehensive electrical specifications, pin configurations for various packages (D, FK, JG, P), and dissipation rating tables.
| Small-Signal Bandwidth (Typ) | 15 MHz |
|---|---|
| Slew Rate (Min) | 50 V/s |
| Bias Current (Max) LM118/LM218 | 250 nA |
| Supply Voltage Range | +5 V to +20 V |
| Operating Temperature LM118 | -55°C to 125°C |
| Operating Temperature LM218 | -25°C to 85°C |
| Operating Temperature LM318 | 0°C to 70°C |
The LM118 operates from -55°C to 125°C, the LM218 from -25°C to 85°C, and the LM318 from 0°C to 70°C.
No, they feature internal unity-gain frequency compensation, though external components can be added for optimum performance.