Quad current-sense amplifier for multi-rail monitoring
The MAX4378TAUD+ is a quad current-sense amplifier from Analog Devices in a 14-TSSOP package. It integrates four independent current-sense amplifiers, each with a 2 MHz bandwidth and 10V/µs slew rate, operating from a single 3 V to 28 V supply. The -40°C to 125°C temperature range suits it for industrial motor drives, automotive battery monitoring, and telecom power-supply current sensing where multiple rails need simultaneous measurement.
Supply range and bandwidth — what they mean for your design
The 3 V to 28 V supply span covers common rails. The 2 MHz bandwidth tracks switching frequencies up to several hundred kHz. The 10V/µs slew rate keeps the output responsive to fast load transients.
Temperature grade and environment
Rated for -40°C to 125°C, this part fits under-hood automotive electronics, outdoor telecom base stations, and factory-floor motor drives. The 14-TSSOP package is a standard surface-mount footprint, compatible with automated pick-and-place. The 1 mA per-channel supply current (4 mA total) keeps the thermal contribution low in a densely populated board.