MAX4080/MAX4081 high-side current-sense amplifiers are high-voltage current-sense amplifiers with an input voltage range that extends from 4.5V to 76V making them ideal for telecom, automotive, backplane, and other systems where high-voltage cur- rent monitoring is critical
The MAX4080/MAX4081 are high‑side current‑sense amplifiers that operate from 4.5 V to 76 V, making them suitable for automotive, telecom, backplane and other high‑voltage systems. The MAX4080 provides unidirectional sensing, while the MAX4081 adds bidirectional capability with an external reference for zero‑current output.
Key features include three gain versions (5 V/V, 20 V/V, 60 V/V), ±0.1 % full‑scale accuracy, 100 pV input offset voltage, low 75 µA supply current, and availability in compact 8‑pin UMAX or SO packages. The devices operate over an automotive temperature range of –40 °C to +125 °C.
| Input voltage range | 4.5 V to 76 V |
|---|---|
| Supply current | 75 µA |
| Gain options | 5 V/V (F), 20 V/V (T), 60 V/V (S) |
| Full‑scale accuracy | ±0.1 % |
| Input offset voltage | 100 pV |
| Operating temperature range | –40 °C to +125 °C |
| Package types | 8‑pin UMAX or 8‑pin SO |
| Common‑mode range | 4.5 V to 76 V |
The MAX4080 draws only about 75 µA of supply current.
Three gain versions are offered: 5 V/V (F), 20 V/V (T), and 60 V/V (S).
They operate from 4.5 V up to 76 V.
Both devices are available in 8‑pin UMAX and 8‑pin SO packages.