The LF155H/883 is a precision JFET-input operational amplifier manufactured by National Semiconductor (now Texas Instruments). This op-amp is designed for applications requiring high input impedance, low input bias current, and wide bandwidth. The /883 designation indicates that it is processed to meet stringent military standards for reliability and performance over an extended temperature range.

Applications

• Precision instrumentation amplifiers
• High-impedance buffers
• Sample-and-hold circuits
• Integrators
• Photodiode amplifiers

Features

• Low input bias current
• High input impedance
• Wide bandwidth
• Low noise
• High slew rate
• Internal trimming for low input offset voltage
• Military temperature range operation

Benefits

• Accurate signal amplification with minimal loading of the source
• High-speed performance for demanding applications
• Low noise for high signal-to-noise ratio
• Stable operation over a wide temperature range
• Enhanced reliability for critical applications

Additional Details

The LF155H/883 op-amp is characterized by its JFET-input stage, which provides extremely high input impedance, typically in the teraohm range, and very low input bias current, typically in the picoampere range. This makes it ideal for amplifying signals from high-impedance sources without significantly loading them. The wide bandwidth and high slew rate enable the amplifier to accurately process high-frequency signals and rapidly changing waveforms. The internal trimming ensures low input offset voltage, minimizing errors in precision applications. The /883 processing includes additional testing and screening to ensure compliance with military standards for temperature range, shock, vibration, and other environmental factors. Detailed specifications can be found in the National Semiconductor/Texas Instruments datasheets, including parameters such as input offset voltage, input bias current, bandwidth, slew rate, and power supply requirements. The device is available in various package options suitable for military and aerospace applications.