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LM321MFX SOT-23-5 Single Low-Power Op-Amp IC (10-Pack)
LM321MFX SOT-23-5 Single Low-Power Op-Amp IC (10-Pack)
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LM321MFX SOT-23-5 Single Low-Power Operational Amplifier IC
The LM321MFX is a single-channel, low-power operational amplifier in a compact SOT-23-5 surface-mount package. With a 1MHz gain-bandwidth product and wide supply voltage range (1.8V–26V), it is optimized for portable, battery-powered, and space-constrained applications requiring precision analog signal processing.
Key Specifications
| Parameter | Value |
|---|---|
| Part Number | LM321MFX / LM321 |
| Package | SOT-23-5 (SMD) |
| Supply Voltage | 1.8V – 26V (single) / ±0.9V – ±13V (dual) |
| Gain-Bandwidth Product | 1MHz typical |
| Slew Rate | 1V/μs |
| Input Offset Voltage | 2mV typical |
| Supply Current | 175μA typical |
| Input Common-Mode Range | Includes negative rail |
| Output Swing | Near rail-to-rail |
| Quantity | 10 pieces |
Why Choose LM321MFX?
- Ultra-Low Power — 175μA supply current extends battery life in IoT and wearable designs
- Wide Supply Range — 1.8V–26V covers 3.3V, 5V, 9V, and 12V systems
- SOT-23-5 Package — Minimal PCB footprint for high-density designs
- Single-Supply Operation — Input common-mode range includes ground for single-supply circuits
- LM358/LM741 Upgrade — Lower power, smaller package, better for modern designs
Typical Applications
- Sensor signal conditioning (temperature, pressure, light)
- Comparator circuits with hysteresis
- Active filter design (low-pass, high-pass, band-pass)
- Transimpedance amplifier for photodiode/current sensing
- Battery-powered instrumentation and data loggers
- Audio preamplifier stages in portable devices
Compatible With
Pin-compatible with LM321, LMV321, TS321, MCP6001 in SOT-23-5. Functionally equivalent to one channel of LM358 (DIP-8) or LM324 (DIP-14).
FAQ
Q: What’s the difference between LM321 and LM358?
A: LM321 is a single-channel version of LM358 (dual). LM321MFX adds the SOT-23-5 SMD package and lower power consumption vs. the original LM321 DIP.
Q: Can LM321 be used as a comparator?
A: Yes, though it lacks a push-pull output stage. For open-collector comparator behavior, use LM393 instead.
Package Contents
- 10× LM321MFX SOT-23-5 Single Op-Amp IC
