ADM12914 is a quad undervoltage/overvoltage (UV/OV) positive/negative voltage supervisor with ±0.8% accuracy. It can monitor up to two negative rails. The product features adjustable UV and OV input thresholds, industry-leading threshold accuracy, 1V buffered reference output, adjustable reset timeout with disable option, etc.
The ADM12914 quad voltage supervisor monitors up to four power rails for undervoltage (UV) and overvoltage (OV) conditions. Each rail uses a pair of pins (VHx and VLx) and the device provides a 1 V buffered reference output for negative‑voltage monitoring. The SEL pin selects the polarity for the third and fourth inputs, enabling both positive and negative supply supervision.
Key features include adjustable UV/OV thresholds, a low‑power shunt regulator for operation up to 6 V (or higher with a dropper resistor), open‑drain UV/OV outputs, and glitch immunity. The device operates from –40 °C to +125 °C and is supplied in a 16‑lead QSOP package.
| Supply voltage (VCC) range | 2.3 V to 6.0 V |
|---|---|
| Supply current (ICC) typical | 62 µA |
| Reference output voltage | 1.0 V |
| Undervoltage/Overvoltage threshold (VUOT) | 496 mV – 504 mV |
An external dropper resistor is placed between the supply rail and the VCC pin to limit current to less than 10 mA, enabling the internal shunt regulator to operate with higher voltages.
The typical supply current is 62 µA at 25 °C.