OPA4140AIPW

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The OPA4140AIPW is a precision, low-noise, rail-to-rail, single-channel operational amplifier (op-amp) that is suitable for wide range of linear applications. It is specifically designed for high-precision, audio instrumentation, medical, low-noise and general-purpose applications. The device features guaranteed low-noise performance, rail-to-rail common-mode voltage range, rail-to-rail output swing, low supply current and low offset voltage. This makes it suitable for high-precision voltage preamplifier, current sensing, servo control and portable instrumentation applications.

The OPA4140AIPW can operate from +2 V to +36 V dual supply, as well as from a single supply of +1.8 V to +36 V. The device is specified with -3 dB bandwidth up to 370 kHz, and has open-loop gain of 130 dB with 1 nV/√Hz input voltage noise. The device also provides very low 1.8 μV of typical offset voltage (with no external compensation required) and 0.2 μV/°C offset drift. It is able to source 22 mA and sink 19 mA of output current, with output power up to 96 mW.

The OPA4140AIPW op-amp is constructed using silicon wafer process. This process provides very tight matching between units even after long-term operation in extreme temperature and voltages. The device also features high-reliability layers to reduce is stress on the silicon die and maintain stability after long periods of operation. These features make it an excellent choice for precision Instrumentation, medical, low-noise and general-purpose applications.

Working Principle

The OPA4140AIPW is a precision, single-channel operational amplifier. It is designed to amplify low-level signals and provides a rail-to-rail output swing. The device has an open-loop gain of 130 dB and noise of 1 nV/√Hz input voltage noise. It operates from a dual power supply of +2 V to +36 V and from a single supply of +1.8 V to +36 V. The device is capable of producing 96 mW of output power.

The OPA4140AIPW operates on four basic principles; input bias current, input offset current, gain and bandwidth. The input bias current is the main factor that influences the input voltage range, as well as the power consumption of the op-amp. The offset current is the current required to be introduced to the output of the device in order for its quiescent output voltage to reach 0 V. The device has a very low input offset current of 1 μA. The OPA4140AIPW has a very high open-loop gain of 130 dB and an impressive -3 dB bandwidth of 370 kHz. This ensures that the device is suitable for high-precision voltage preamplifier, current sensing and servo control applications.

The OPA4140AIPW has a rail-to-rail common-mode voltage range, which means that its amplifier can operate from negative or positive supply voltages. It also features a very low offset voltage of 1.8 μV, with no external compensation required. This enables the device to be used in precision Instrumentation and medical applications, such as portable spectrometers and jet-injectors.

The OPA4140AIPW is capable of sourcing 22 mA and sinking 19 mA of output current, with excellent stability. This makes the device suitable for low-current applications such as motion control, audio preamplifiers and automation.

The OPA4140AIPW op-amp also offers high-reliability layers to reduce the stress on the silicon die and maintain stability after long periods of operation. This makes it a great choice for applications that require low noise and high reliability.

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