Maxim MAX44251 op amp

Maxim has introduced the MAX44251, a 20 V, ultra-precise, low-noise, dual op amp that extends maintenance system uptime and maximises sensor performance.

Autozero technology enables continuous self-calibration that ensures system accuracy over time, temperature and power supply variations.

The (<6 µV initial offset) is over the wide 2.7 to 20 V operating range.

The device provides good RF immunity filters that remove the unwanted RF signals often found in industrial and medical applications.

The 1.15 mA consumption per channel offers good 10 MHz gain bandwidth and noise at 5.9 nV/√Hz input referred voltage. The op amp is suitable for high-voltage application that require ultra-low noise and ultra-high DC precision, such as interfacing with pressure sensors, strain gauges, precision weight scales and medical instrumentation.

The device has near-zero DC offset and drift through a autocorrelating, zeroing technique. Autozeroing constantly measures and compensates the input offset, thus eliminating drift over time and temperature. The low-input offset voltage of 6 µV (max) and temperature drift of 19 nV/°C (max) offer precision across -40 to 125°C. Autozero offset calibration also eliminates the effects of power supply variations and even common-mode variations.