NATIONAL SEMICONDUCTOR LMC7211 Tiny CMOS Comparator with Rail-to-Rail Input and Push-Pull Output
Summary
The LMC7211 is a micropower CMOS comparator engineered for highly compact and battery-powered applications. Featuring a space-saving SOT23-5 package, it provides rail-to-rail input capabilities, making it ideal for direct interfacing with various sensors (optical, magnetic, light). This manual details comprehensive electrical characteristics including low offset voltage, minimal supply current, and high common-mode rejection ratio across operational supplies (2.7V to 15V). It is perfect for designers building portable electronics like pagers, PDAs, mobile phones, and alarm systems where minimal size and optimal power efficiency are critical.
Manual Details
| Brand | National |
|---|---|
| Pages | 15 |
| File Size | 376.08 KB |
| Published | June 15, 2026 |
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Frequently Asked Questions
What applications are ideal for the LMC7211 due to its rail-to-rail input?
It is excellent for sensor interfacing, such as light detector circuits, optical/magnetic sensors, and alarm/status circuits.
How does the physical size of this comparator benefit design?
The Tiny SOT 23-5 package (1.43 mm thick) makes it ideal for space and weight critical designs like mobile phones or PDAs.
What operating voltage range is supported by the LMC7211?
The device operates with a supply voltage (V+) in the range of 2.7V to 15V, with a related negative supply (-V-) between -0.3V and -16V.
What is the typical quiescent supply current at 5V?
The typical supply current is low, clocking around 7 µA at a 5V supply voltage.