The OPA145 and OPA2145 (OPAx145) operational amplifiers are part of a family of low-power JFET input amplifiers that feature superior 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 amplifier while also interfacing to modern, single-supply, precision, analog-to-digital converters (ADCs) and digital-to-analog converters (DACs). The OPAx145 achieve 5.5-MHz gain-bandwidth product and 20-V/μs slew rate and consume only 445 µA (typical) of quiescent current, making these devices an excellent choice for low-power applications. These devices operate on a single 4.5-V to 36-V supply or dual ±2.25-V to ±18-V supplies.

The OPAx145 are fully specified from –40°C to +125°C for use in the most challenging environments. The single-channel OPA145 is available in 5-pin SOT-23, 8-pin SOIC, and 8-pin VSSOP packages. The dual-channel OPA2145 is available in 8-pin SOIC and 8-pin VSSOP packages.

Section 7.2 shows the simplified diagram of the OPAx145.