The OPAx140 family of operational amplifiers is a series of low-power JFET input amplifiers that feature excellent drift performance and low input bias current. The rail-to-rail output swing and input range that includes V– allow designers to use the low-noise characteristics of JFET amplifiers while also interfacing to modern, single-supply, precision analog-to-digital converters (ADCs) and digital-to-analog converters (DACs). The OPAx140 series achieves 11-MHz unity-gain bandwidth and 20-V/μs slew rate, and consumes only 1.8 mA (typical) of quiescent current. These devices operate on a single 4.5-V to 36-V supply or dual ±2.25-V to ±18-V supplies.

Section 7.2 shows the simplified diagram of the OPAx140.