OPA128 is a low bias current monolithic operational amplifier produced by Burr-Brown. It features ultra-low bias current, low input offset voltage, low drift, etc. It is suitable for electrometers, mass spectrometers, chromatographs, ion gauges, photodetectors, and radiation-hardened equipment.
The OPA128 is an ultra-low bias current monolithic operational amplifier utilizing advanced geometry dielectrically-isolated FET (Difet) inputs. It is designed to achieve performance levels exceeding even the best hybrid electrometer amplifiers, making it suitable for high-precision applications such as electrometers, mass spectrometers, and chromatographs. The device features laser-trimmed thin-film resistors for outstanding voltage offset and drift performance.
| Input Bias Current (Max) | 75 fA |
|---|---|
| Input Offset Voltage (Max) | 500 uV |
| Input Offset Voltage Drift (Max) | 5 uV/°C |
| Open-Loop Gain (Min) | 110 dB |
| Common-Mode Rejection (Min) | 90 dB |
The OPA128 is an improved pin-for-pin replacement for the AD515 and AD549.
It uses advanced geometry dielectrically-isolated FET (Difet) inputs.
Applications include electrometers, mass spectrometers, chromatographs, ion gauges, and photodetectors.