![]() If the design does not use this property, then replacement is probably not hard. In the context of this thread, if you want to replace a LM324 in an existing design, you have to keep in mind that the designer of the original design may be using the LM324's overvoltage capability. If you do not have overvoltage, you just have to make different design choices. ![]() In many supply designs, they get around this problem by using a reverse-biased diode that goes from the load output back to the supplies power rail which means that if the supply is off, and you attach a 12V battery, the battery is actually powering the power supply. With almost all other opamps, I would have to add a series resistor, and the schottky diodes, and they would load the battery. This means that I can have a 12V battery on the output, and switch off the power supply, and the LM324's can cope with the 12V from the battery fine without loading the battery. As another example, I used LM324s in my power supply project. With the LT1491, a 1K series resistor with the input means it is safe for positive and negative overvoltages. With a LM324, you do not have to worry about this for positive overvoltages. What this means is that if you use conventional opamps in a circuit with multiple supply rails, and assume the supplies power up at different rates, you have to make sure that on power up, an opamp input can never go above or below the supply rails. You cannot rely on the inherent IC diode junctions as it it those junctions that cause the latchup in the first place. So if your opamp circuit does connect to an externally power circuit that under some circumstances (eg power up) can drag an input more then 0.3V above the positive rail or 0.3V below the negative rail, then you do have to add a series resistor and a pair of external schottky diodes. If the inputs exceed the specified maximums, the opamp IC can latch that usually means it self destructs. For example, the LM324-N-MIL device can directly operate off of the standard 5-V power supply voltage which is used in digital systems and easily provides the required interface electronics without requiring the additional ☑5 V power supplies.Yes. Operation from split-power supplies is also possible and the low-power supply current drain is independent of the magnitude of the power supply voltage.Īpplication areas include transducer amplifiers, DC gain blocks and all the conventional op amp circuits which now can be more easily implemented in single power supply systems. The LM324-N-MIL device consists of four independent, high-gain, internally frequency compensated operational amplifiers designed to operate from a single power supply over a wide range of voltages. Input Bias Current is Also Temperature Compensated.Unity Gain Cross Frequency is Temperature Compensated.Can Swing to Ground, Even Though Operated from Only a Single Power Supply Voltage.In the Linear Mode the Input Common-Mode, Voltage Range Includes Ground and the Output Voltage.Power Drain Suitable for Battery Operation.Allows Direct Sensing Near GND and V OUT also Goes to GND.Four Internally Compensated Op Amps in a Single Package.Large Output Voltage Swing 0 V to V + − 1.5 V.Differential Input Voltage Range Equal to the Power Supply Voltage.Input Common-Mode Voltage Range Includes Ground.Essentially Independent of Supply Voltage Internally Frequency Compensated for Unity Gain.parametric-filter Precision op amps (Vosparametric-filter High-speed op amps (GBW ≥ 50 MHz).parametric-filter General-purpose op amps.parametric-filter Special function amplifiers.parametric-filter Programmable & variable gain amplifiers (PGAs & VGAs).parametric-filter Operational amplifiers (op amps).parametric-filter Instrumentation amplifiers.parametric-filter Fully differential amplifiers.parametric-filter Difference amplifiers.parametric-filter Current-sense amplifiers.parametric-filter Wireless connectivity.parametric-filter Switches & multiplexers.parametric-filter Microcontrollers (MCUs) & processors.parametric-filter Logic & voltage translation.
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