OPA4353UA

Voltage - Input Offset:	3mV
Base Part Number:	OPA4353
Supplier Device Package:	14-SOIC
Package / Case:	14-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Voltage - Supply, Single/Dual (±):	2.5 V ~ 5.5 V, ±1.25 V ~ 2.75 V
Current - Output / Channel:	40mA
Current - Supply:	5.2mA
Series:	MicroAmplifier™
Current - Input Bias:	0.5pA
Gain Bandwidth Product:	44MHz
Slew Rate:	22 V/µs
Output Type:	Rail-to-Rail
Number of Circuits:	4
Amplifier Type:	General Purpose
Part Status:	Active
Packaging:	Tube

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The OPA4353UA is a high performance instrumentation amplifier that is well suited for various applications in the field of linear amplifiers, OP Amps, Buffer Amps and many other uses. It is designed for use in industrial and medical instrumentation, and has the ability to achieve considerable levels of HIGH CMRR, good input bias currents, and excellent power supply rejection ratios. This amplifier is a low power, low voltage precision monolithic amplifier that offers a low noise performance and a wide bandwidth.The OPA4353UA can be used in various applications, such as signal conditioning, filtering, isolation, and amplification above the noise floor. It is specified over the full temperature range of -40°C to +85°C and is capable of driving high loads with minimal distortion and noise. The amplifier has two power supply pins (V- and V+) that should be used to provide the necessary power supply to the amplifier. The OPA4353UA is also used in applications such as consumer electronics, automotive, medical, and industrial instrumentation.To understand how the OPA4353UA works, let us first look at the amplifiers concept of linearity. Generally, the amplifier must have a linear relationship between its gain and its output voltage. Basically, with a linear amplifier, the gain is equal to the input temperature divided by the output temperature and is usually expressed as a voltage ratio. That is to say, a linear amplifier does not introduce distortion on its output. Next, we will look into the amplifier’s working principle. The OPA4353UA utilizes a differential pair of n-channel JFETs as its input stage, which is followed by an output stage. The input stage is used to create the differential voltage between the two inputs while the output stage is used to provide the gain. The op amp is then used to provide the necessary negative feedback, which is known as the feedback topology.The OPA4353UA also includes integrated input and output offset nulling pins. These pins can be used to adjust the amplifier’s gain and offset voltage to a predetermined value, making it easier to achieve a higher CMRR. The amplifier utilizes a three-terminal control design, which makes it easier to set the output offset voltage and the maximum output voltage.The amplification process of the OPA4353UA is split into two stages. The first stage is the input stage and the second stage is the output stage. The input stage, as explained above, utilizes the differential pair of n-channel JFET transistors to create the differential voltage between the two inputs, which is then passed to the output stage. The output stage is where the gain is set to the desired value using the feedback loop and the control pins.Finally, the OPA4353UA utilizes a power supply voltage of ± 15 V, which is split between the input and output stages. A wide bandwidth response is achieved through the application of optimized feedback compensation techniques. Additionally, the OPA4353UA features high slew rate capabilities, excellent temperature stability, and input offset voltage trimming.In conclusion, the OPA4353UA is a highly versatile amplifier that can be used in various instrumentation applications. It offers a wide bandwidth and excellent power supply rejection ratio. The amplifier is also capable of driving high external loads with a minimal amount of distortion and noise. Its integrated offset nulling pins make it easier to fine-tune the gain and offset voltage and its integrated control design makes it easier to adjust the output voltage and offset voltage. Finally, the amplifier is designed to work over the full temperature range of -40°C to +85°C.

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