Voltage - Input Offset:	1mV
Base Part Number:	OPA549
Supplier Device Package:	TO-220-11
Package / Case:	TO-220-11 (Formed Leads)
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 85°C
Voltage - Supply, Single/Dual (±):	8 V ~ 60 V, ±4 V ~ 30 V
Current - Output / Channel:	10A
Current - Supply:	26mA
Series:	--
Current - Input Bias:	100nA
Gain Bandwidth Product:	900kHz
Slew Rate:	9 V/µs
Output Type:	--
Number of Circuits:	1
Amplifier Type:	Power
Part Status:	Active
Packaging:	Tube

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OPA549TG3 Application Field and Working Principle

Introduction

The OPA549TG3 is a monolithic, precision voltage feedback operational amplifier featuring the highest available open-loop bandwidth, excellent small signal bandwidth, low distortion and low noise. The amplifier is well-suited for a variety of instrumentation, linear control and buffer amplification applications.

Application Field

The OPA549TG3 has a wide range of applications, ranging from basic linear and buffer amplifiers to more diverse applications, such as active filters and instrumentation amplifiers. One of its primary applications is as a general-purpose amplifier and buffer. The low noise and high open loop gain of the OPA549TG3 makes it an ideal choice for this application, as it is capable of amplifying and buffering low level signals with minimal distortion and noise. The OPA549TG3 can also be used as an active filter. The high open-loop gain, low noise and wide bandwidth of the amplifier enable it to accurately reproduce signals in a range of frequency bands. This makes it an ideal choice for audio applications such as equalizers and bass boosters. The OPA549TG3 is also commonly used in instrumentation amplifiers. The high open-loop gain, low noise and wide bandwidth of the amplifier allow it to accurately measure low-level signals with minimal error. This makes it an ideal choice for applications such as strain gauges, bio-potential measurement systems, and other precision instrumentation.

Working Principle

The OPA549TG3 is a voltage feedback operational amplifier and operates on a differential input. The basic circuit of the amplifier consists of an input stage, a gain stage, a voltage feedback stage and an output stage, where all the stages are connected in series. The input stage is the heart of the amplifier and provides the input signals to the amplifier. The input signals are applied to the differential input, which consists of two transistors, one p-channel, and one n-channel transistor. The input signals are amplified by the gain stage which consists of three transistors and increases the input signals to the necessary level to drive the output stage. The output stage also consists of three transistors and serves to deliver the amplified and buffered signals to the output. The output stage is also connected to the voltage feedback stage, which provides the necessary feedback to the gain stage. This ensures that the amplifier is able to maintain a constant gain, regardless of the input voltage.

Conclusion

The OPA549TG3 is a versatile and reliable operational amplifier that can be used in a variety of applications. Its high open-loop gain, low noise, and wide bandwidth make it an ideal choice for applications such as linear amplifiers, buffer amplifiers, active filters, and instrumentation amplifiers.

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