OP491

Category: Amplifiers, Analog Devices Inc, Electronics

The Analog Devices OP191, OP291, and OP491 micropower op-amps are designed for single-supply operations and are characterized by their rail-to-rail input and output capabilities. These amplifiers are fabricated on the CBCMOS process and are notable for their ability to handle inputs that extend well beyond the power supply levels without phase inversion or latch-up. Additionally, they feature a low offset voltage of 700 µV and a low supply current requirement of 300 µA per amplifier.

Key Features

Supply Voltage Range: The devices can be operated with supply voltages ranging from 2.7 V to 12V.

Rail-to-Rail Output Swing: This feature ensures that the output voltage reaches very close to the supply rails, hence maximizing the dynamic range.

Low Supply Current: The amplifiers consume just 300 µA per amplifier, making them suitable for battery-powered applications.

Wide Bandwidth: They have a 3 MHz bandwidth, suitable for a variety of signal processing tasks.

Slew Rate: These devices have a 0.5 V/µs slew rate, facilitating good transient response.

Applications

The OP191, OP291, and OP491 are particularly useful in areas such as industrial process control, battery-powered instrumentation, power supply control and protection, telecommunications, remote sensors, low voltage strain gage amplifiers, and DAC output amplifiers.

Variants and Packaging

The OP191, OP291, and OP491 family includes single (OP191), dual (OP291), and quad (OP491) amplifier configurations. The OP191 and OP291 are available in 8-lead plastic SOIC surface-mount packages. The OP491 quad version comes in three package options: a 14-lead PDIP, a narrow 14-lead SOIC, and a 14-lead TSSOP.

Performance and Reliability

These devices are designed for extended industrial temperature range operation, from -40°C to +125°C. The amplifiers offer reliable performance, and the provided specifications cover the complete temperature range.

Disclaimer: While the information is deemed reliable, Analog Devices does not assume responsibility for its use or for any patent or other rights infringements that might arise from its application. Specifications are subject to change without notice, and no license is implicitly or otherwise granted under any patent rights of Analog Devices.