OPA3690IDRG4

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

OPA3690IDRG4 Application Field and Working Principle

OPA3690IDRG4 is a low-power operational amplifier ([Op-Amp][1]) that is capable of providing a wide range of gains and very low offset voltage. It is well-suited for use in highly sensitive analog circuits and can be used for a variety of application requirements. The Op-Amp is available in a variety of packages, including surface-mount and through-hole variants.

Overview

The OPA3690IDRG4 is a high-precision, low-power Op-Amp featuring a very low offset voltage of 50 µV maximum and an input voltage noise density of 8nV/ √Hz. It is widely used in precision applications such as medical equipment, weighing scales, communication systems, and instrumentation. The OPA3690IDRG4 is available in the 8-pin PDIP and the SOIC 8 packages.

Application Field

The OPA3690IDRG4 is typically used in audio circuits and high-end microphones due to its very low voltage offset and low noise. It is also widely used in precision DC measurement circuits and resistive bridge applications as its wide gain range allows for a high input impedance and very precise DC transfer. It provides excellent linearity, high accuracy and low noise, making it suitable for use in medical equipment and remote controls. The low-noise, low-offset characteristics make it a great choice for instrumentation, such as Wheatstone bridge amplifiers, strain gauges and pressure sensors.

In addition, OPA3690IDRG4 is often used as an active filter and an amplifier in temperature-measuring instruments, as well as in voltage-to-frequency and frequency-to-voltage conversion circuits. It is also suitable for use with digital audio circuits and other integrated systems.

Working Principle

The OPA3690IDRG4 is based on the classic voltage follower architecture, wherein the output voltage is mainly determined by the input voltage. The amplifier consists of 4 stages: the input stage, the bias stage, the gain stage and the output stage. The input stage consists of a cascaded pair of pre-amplifier transistors that convert the input signal into a current, which is then regulated by the bias stage. The gain stage consists of another cascaded pair of transistors which set the gain of the amplifier. Finally, the output stage amplifies the current supplied by the gain stage, and the regulated output voltage is then provided.

The output stage is designed to ensure that the output voltage remains free from error even at very high gain levels, providing accurate linearity and low distortion. The OPA3690IDRG4 provides a wide range of gains from 0.1 to 1000, allowing it to be used for precision gain trimming and AC/DC gain adjustment depending on the application requirements. It also features very low bias current and wide common mode input and output voltages, providing excellent dynamic performance.

Conclusion

OPA3690IDRG4 is a low-power operational amplifier primarily used for precision analog applications because of its precision, low voltage offset and low noise. It is typically used in audio circuits and high-end microphones, DC measurement circuits and resistive bridge applications, active filters, temperature-measuring instruments and integrated systems. Its working principle is based on the classic voltage follower architecture, wherein the output voltage is mainly determined by the input voltage. The amplifier consists of four stages, facilitating accurate linearity, low distortion and very wide gain ranging capabilities.

The specific data is subject to PDF, and the above content is for reference