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OPA404SG Information
OPA404SG by Texas Instruments is an Operational Amplifier.
Operational Amplifiers are under the broader part category of Amplifier Circuits.
Amplifier circuits use external power to increase the amplitude of an input signal. They can be used to perform linear amplifications or logarithmic functions. Read more about Amplifier Circuits on our Amplifier Circuits part category page.
US Tariff Estimator: OPA404SG by Texas Instruments
Calculations from this tool are estimations only for imports into the United States. Please refer to the distributor or manufacturer and reference official US government sources and authorities to verify any final purchase costs.
This table gives cross-reference parts and alternative options found for OPA404SG. The Form Fit Function (FFF) tab will give you the options that are more likely to serve as direct pin-to-pin alternates or drop-in parts. The Functional Equivalents tab will give you options that are likely to match the same function of OPA404SG, but it may not fit your design. Always verify details of parts you are evaluating, as these parts are offered as suggestions for what you are looking for and are not guaranteed.
The maximum power dissipation of the OPA404SG is 670mW, which is calculated based on the maximum junction temperature (TJ) of 150°C and the thermal resistance (θJA) of 125°C/W.
To ensure stability, it's essential to follow proper PCB layout practices, minimize parasitic capacitance, and use a compensation capacitor (if necessary) as recommended in the datasheet. Additionally, consider using a series resistor (Rs) to isolate the input capacitance and improve stability.
The recommended input impedance for the OPA404SG is ≥1kΩ to ensure optimal performance and minimize input bias current effects. However, the input impedance can be lower if the source impedance is matched to the op-amp's input impedance.
While the OPA404SG can be used as a comparator, it's not the most suitable choice due to its relatively slow slew rate (0.5V/μs) and limited bandwidth (5.5MHz). A dedicated comparator like the LM339 or TLV7031 would be a better option for most applications.
To protect the OPA404SG from overvoltage and ESD, use voltage clamps (e.g., TVS diodes) and ESD protection devices (e.g., ESD arrays) on the input and output pins. Additionally, follow proper PCB layout practices, such as keeping sensitive nodes away from the board edges and using guard rings.
