The LTC ®1440/LTC1441/LTC1442 are ultralow power single and dual comparators with built-in references.
The LTC1440, LTC1441, and LTC1442 are ultralow‑power single and dual comparators with built‑in reference voltages. They offer quiescent currents as low as 2.1 µA (typical for LTC1440), a wide supply range (2 V‑11 V single, +1 V‑+5.5 V dual), TTL/CMOS compatible outputs, and up to 40 mA continuous source current. Adjustable hysteresis is available on the LTC1440 and LTC1442, and the reference output can drive a 0.01 µF bypass capacitor without oscillation.
The devices are offered in several package options, including 8‑lead PDIP, SO, MSOP, and a 3 mm × 3 mm × 0.75 mm DFN for the LTC1440. Typical applications include battery‑powered system monitoring, threshold detectors, window comparators, and oscillator circuits. The handbook includes absolute maximum ratings, detailed electrical characteristics, and performance graphs for propagation delay, output voltage, and source/sink currents.
| Supply voltage range (single) | 2 V to 11 V |
|---|---|
| Supply voltage range (dual) | +1 V to +5.5 V |
| Continuous source current | 40 mA |
| Reference output drive capability | 0.01 µF capacitor |
| Adjustable hysteresis | Available on LTC1440/LTC1442 |
| Input voltage range | Includes negative supply |
| Propagation delay (10 mV overdrive) | 12 µs |
| Package (LTC1440 DFN) | 3 mm × 3 mm × 0.75 mm |
They operate from 2 V to 11 V on a single supply, or from +1 V to +5.5 V on a dual supply.
The output can continuously source up to 40 mA.
Yes, the reference output can drive a bypass capacitor up to 0.01 µF without oscillation.