The document describes the features and characteristics of high precision, low noise operational amplifiers, including low noise, wide bandwidth, fast settling time, high CMRR, high open-loop gain, low input bias current, low offset voltage, wide supply range, etc. The OPA227 and OPA228 series op amps are suitable for applications such as data acquisition, telecom equipment, geophysical analysis, vibration analysis, spectral analysis, professional audio equipment, active filters, and power supply control.