Product Overview
Vintage Unused National Semiconductor LM307N Precision Operational Amplifier in DIP-8 Format
This amplifier supports legacy analog instrumentation and signal-conditioning circuits that depend on low input bias current and stable offset behavior. It offers internally compensated performance suitable for unity-gain work, and the standard op amp/linear synonym pairing aligns with typical vintage documentation. Its DIP-8 format fits many period-correct boards.
Product Condition
Unused, New Old Stock.
Product Overview
The National Semiconductor LM307N is the plastic DIP-8 version of the LM107/LM207/LM307 op amp family, known for improved offset, low input bias current, and a 3 MHz gain-bandwidth product. It was widely used in instrumentation, active filters, and precision analog control assemblies. The device includes offset-null pins for fine trimming and supports both single and dual supply configurations common to 1970s commercial systems.
Key Features
- Low input bias current, typically in the tens of nanoamps
- Input offset voltage around 1–3 mV depending on conditions
- Internally compensated for unity-gain stability
- Gain-bandwidth product near 3 MHz
- Slew rate of approximately 0.5 V/µs
- ±4 V to ±18 V supply capability for legacy designs
- Offset-null adjustment via pins 1 and 5
- Standard DIP-8 footprint for direct installation
Applications
- Restoration of precision analog instrumentation
- Active filter stages in legacy control systems
- Transducer signal conditioning
- Vintage audio and measurement equipment repairs
- General-purpose analog prototyping on DIP-8 boards
- Educational work referencing classic op amp architectures
Frequently Asked Questions
How does the LM307N compare to a 741-type op amp?
The LM307N offers lower input bias current, better offset characteristics, and higher bandwidth, making it suitable for more precision-focused analog tasks.
Is the device internally compensated?
Yes. The LM307N is unity-gain stable without external capacitors, which simplifies its use in many restoration scenarios.
Does the LM307N support both single and dual supplies?
Yes. It can operate from ±4 V to ±18 V rails or an equivalent single-supply configuration when the circuit design allows.
What do the offset-null pins do?
Pins 1 and 5 allow fine trimming of offset voltage using an external potentiometer when precision alignment is required.
Use this op amp to rebuild precision analog instrumentation by applying its offset-null capability and low input bias current while installing it into the existing DIP-8 socket on your board.
