The LM7221 is a micropower CMOS comparator available in the space saving 5-Pin SOT23 package. This makes this comparator ideal for space and weight critical designs. The LMC7221 is also available in the 8-Pin SOIC package. The LMC7221 is supplied in two offset voltage grades, 5 mV and 15 mV. The open drain output can be pulled up with a resistor to a voltage which can be higher or lower than the supply voltage—this makes the part useful for mixed voltage sys- tems. For a tiny comparator with a push-pull output, please see the LMC7211 datasheet.
The LMC7221 Tiny CMOS Comparator provides a compact solution for space‑critical designs, featuring a 5‑pin SOT23 package (0.120 × 0.118 in) and an 8‑pin SOIC option. It operates from 2.7 V to 15 V, with typical supply current of 7 µA at 5 V and an input offset voltage of 5 mV or 15 mV depending on grade.
Application information highlights its suitability for mixed‑voltage battery‑powered products, notebooks, PDAs, PCMCIA cards, and sensor interfaces. The open‑drain output can be pulled up to voltages higher or lower than the supply, enabling flexible interfacing with digital logic.
| Supply Voltage Range | 2.7 V – 15 V |
|---|---|
| Typical Supply Current (5 V) | 7 µA |
| Input Offset Voltage | 5 mV or 15 mV (grade dependent) |
| Input Offset Voltage Drift | 1.0 µV/°C |
| Input Current | 0.04 pA |
The typical supply current is about 7 µA at a 5 V supply.
Yes, the open‑drain output can be pulled up to a voltage higher or lower than the supply voltage.
The device is offered in two offset voltage grades: 5 mV and 15 mV.