OPA2237EA/2K5

OPA2237EA/2K5 is a two-channel instrumentation amplifier used for high-precision signal conditioning, processing, and monitoring. A two-channel instrumentation amplifier typically consists of a pair of amplification stages, typically a differential amplifier and then a high-precision gain adjust amplifier. Designed for the most demanding applications, the OPA2237EA/2K5 combines high-speed performance and excellent linearity with a very low noise floor. It features an improved signal-to-noise ratio of 130 dB and a 0.0002 % total harmonic distortion.

Application Field

The OPA2237EA/2K5 is suitable for applications where low noise performance and signal isolation are critical, such as medical instrumentation, precision gain control in signal conditioners and analyzers, acoustic measurement, and audio or video signal processing. It is a popular choice for signal conditioning in medical instrumentation, such as ECG and EEG machines.

Other common applications include: signal strength measurement; power measurement; automotive systems; noise cancellation; audio signal conditioning; speaker protection circuits; industrial process control; instrumentation; voltage level detection; and instrumentation for aircraft and automobiles.

Working Principle

The OPA2237EA/2K5 amplifies a differential input signal in two stages. The first stage, a differential amplifier, provides the required gain, and the second, a high-precision gain adjust amplifier, further refines the signal. The OPA2237EA/2K5 is designed to minimize noise and distortion in the signal, as well as minimizing any input offset voltage. Its wide gain range allows users to tailor the performance of the amplifier to their precise requirements. Additionally, the OPA2237EA/2K5 has a low supply current requirement, allowing it to be used in low-power applications.

The OPA2237EA/2K5 features a high-speed operation with a slew rate of 80V/µs and a Unity Gain Bandwidth of 4MHz. This makes it suitable for wide-bandwidth applications and provides excellent linearity over a wide range of gains. The device also uses an active output stage for improved distortion and noise filtering, lower output impedance, and better dynamic performance. The low output-stage impedance also improves common-mode rejection ratio and reduces dynamic errors over temperature.

The OPA2237EA/2K5 features adjustable gain, offset voltage and output current. The device also features internal protection circuits, including overload protection and brownout protection, which protect the device from overload and power supply irregularities. The adjustable output stage enables the user to control the gain, offset voltage and output current without the need for external components.

The OPA2237EA/2K5 is an excellent choice for precision signal conditioning and processing applications. It offers excellent linearity, low noise performance, and adjustable gain, offset voltage and output current. The device is a popular choice for medical instrumentation and other demanding applications.