OPA355UA/2K5G4

OPA355UA/2K5G4 – Linear Amplifiers – Instrumentation, Op Amps, Buffer Amps

The OPA355UA/2K5G4 is a low-power, wideband voltage feedback operational amplifier from Texas Instruments. It is a member of their high-performance series OPA xxx and is ideal for use in a wide range of precision and high-dynamic range applications. It offers very low distortion and noise, wide bandwidth, and high input impedance, along with excellent linearity, temperature stability, and low power consumption.

Application Field

The OPA355UA/2K5G4 is well suited for precision input transducer amplifiers in industrial sensor interfaces, control systems, process control, and other precision measurement systems. Its wide bandwidth and low distortion also make it well-suited for general-purpose audio, as well as professional and measurement applications. It can also be used for high voltage divider circuits, boost converters, differential amplifiers, and sample-and-hold circuits. Additionally, the OPA355UA/2K5G4 can be used as a current-to-voltage converter, or as a voltage-to-current converter, as well as for high precision signal conditioning, closed-loop instrumentation, and in power supply controllers.

Working Principle

The OPA355UA/2K5G4 is a two-stage amplifier that features two differential input transistors, a current source, and a precision resistor-capacitor (RC) network connected between the two transistors. It features a voltage feedback architecture, which means that the amplifier’s gain can be controlled by adjusting the input voltage. The gain is determined by the ratio of the input voltage to the resistor-capacitor network, and is typically between 10 and 200. The output voltage is determined by the amount of current produced by the current source, which is then amplified by the input transistors. The overall gain can be adjusted by varying the current through the current source.

The OPA355UA/2K5G4 also incorporates a high-performance power management system that provides a wide operating range and low quiescent current consumption. This system is capable of dynamically adjusting the power drain of the amplifier, so that it can operate in power-save mode. The amplifier also features a slew rate of up to 35V/μs and a wide input voltage range of up to ±14V. In addition, it features an adjustable low-noise and high-voltage gain programmable feedback network (PNF).

Conclusion

Overall, the OPA355UA/2K5G4 is an excellent amplifier for a wide variety of precision and high-dynamic range applications. Its low distortion, wide bandwidth, and high input impedance make it well-suited for audio, process control, and control systems. Its voltage feedback architecture, wide operating range, low quiescent current consumption, and adjustable feedback network make it an ideal choice for instrumentation and signal conditioning. Its adjustable gain and slew rate, as well as its wide input voltage range, make it suitable for a variety of power supply controllers.