Product Overview
Dual Op Amp That Runs On One Supply And Swings To Ground
Condition
New. Unused stock from our Idaho shelves. The 8-pin plastic DIP body is clean and unmarked apart from the factory printing: the National Semiconductor stylized N logo with M81AD on the top line, then LM and 358AN on the lines below. The pin 1 dimple and the end notch are both crisp. All eight leads are present, straight, bright, and factory formed for through-hole insertion, with no solder on the tips and no sign of a part that has been in and out of a board. The underside carries a molded circular AI mark and light mold texture.
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Product Overview
The National Semiconductor LM358AN is a dual operational amplifier in an 8-pin plastic DIP, holding two internally compensated op amps in one package. Its defining trick is that it eliminates the need for dual supplies: it allows direct sensing near GND, and VOUT also goes to GND, so a designer can build a working amplifier stage from a single rail instead of a split positive and negative pair. Power drain is low enough to suit battery operation, and the outputs are compatible with all forms of logic, which is why the part shows up constantly between a sensor and a microcontroller. The listing name carries the familiar headline numbers for this family, 100 dB and 1 MHz. The A suffix denotes the tighter-specified version of the LM358, and the N suffix is National's code for the plastic dual in-line package you see in the photographs. Piece marking on these units reads LM358AN under the National N logo.
Key Features
- Two internally compensated op amps in one package
- Eliminates need for dual supplies
- Allows direct sensing near GND, and VOUT also goes to GND
- Compatible with all forms of logic
- Power drain suitable for battery operation
- 100 dB and 1 MHz as listed for this part family
- 8-pin plastic DIP, through-hole leads, confirmed by photograph
- Marked LM358AN with the National Semiconductor N logo and M81AD lot line
Applications
- Instrumentation builder conditioning a bridge or thermistor signal on a single 5V rail before it reaches an ADC input
- Hobbyist restoring a battery powered field meter who needs a low drain amplifier that will not demand a negative supply
- Controls technician repairing a legacy board where the original 8-pin DIP op amp has failed and the socket must be filled exactly
- Student or prototyper breadboarding an active filter or comparator-style stage and wanting a forgiving, well documented dual amplifier
Frequently Asked Questions
Is this the plastic DIP version or a surface mount part?
Plastic DIP. The photographs show an 8-pin dual in-line package with straight through-hole leads and a pin 1 dimple. The N in LM358AN is National's plastic DIP suffix.
Can I run it from a single supply?
Yes, that is the core reason this part exists. It eliminates the need for dual supplies and allows direct sensing near GND, with VOUT also going to GND. Specific supply voltage and swing limits are not confirmed here, so verify against the LM358A datasheet before use.
What does the M81AD marking mean?
It is the factory lot and coding line printed above the part number on these units. We have not decoded it and make no claim about a manufacturing date. What is confirmed is the part marking itself: LM358AN under the National Semiconductor logo.
Are these tested?
These are sold as new, unused stock and are graded visually rather than electrically. Leads are straight and bright and the packages are clean. If your application depends on the tighter A-grade offset specification, verify against the datasheet and confirm on the bench.
Why buy one or two of these instead of a bulk lot from a marketplace?
Because a repair or a prototype usually needs two op amps, not fifty. We sell the exact quantity you want, down to a single piece. Shipping is $8 flat rate and free over $28, so a handful of parts still costs less than a forced-quantity lot, and it leaves Idaho the same or next business day.
Before single supply design was simply how things were done, the LM358 is the part that let an amplifier live on one battery and still read all the way down to ground. Drop it into your board, give it a clean rail, and let it do the quiet work between the sensor and everything downstream.
