Machine Manufacturing

Maxim Intros Low-Noise Op Amp

November 15, 2011

High-voltage and lowest noise, continuously self-calibrating op amp extends system uptime and improves sensor performance.

SUNNYVALE, CA (GLOBE NEWSWIRE) -- Maxim Integrated Products (Nasdaq:MXIM) introduces the MAX44251 a 20 V, ultra-precise, low-noise dual op amp that extends maintenance system uptime and maximizes sensor performance. Proprietary autozero technology enables continuous self-calibration which, in turn, ensures system accuracy over time, temperature, and power-supply variations. The precision (<6 µV initial offset) over the wide 2.7 V to 20 V operating range is unmatched by the competition. This excellent precision improves system accuracy and minimizes errors during signal conditioning. The accuracy over the extended voltage range also makes the op amp more flexible for a range of designs and applications. The MAX44251 provides excellent RF immunity filters that remove the unwanted RF signals often found in industrial and medical applications. Superior efficiency and power savings come with no sacrifice in performance. The low 1.15 mA current consumption per channel offers excellent 10 MHz gain bandwidth and the industry's lowest noise (5.9 nV/√Hz input referred voltage) for a high-voltage autozero op amp. The MAX44251 is ideally suited for high-voltage applications 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 MAX44251 has near-zero DC offset and drift through the use of a proprietary autocorrelating, zeroing technique. Autozeroing constantly measures and compensates the input offset, thus eliminating drift over time and temperature and the effect of 1/f noise. The low-input offset voltage of 6µV (max) and voltage temperature drift of 19 nV/°C (max.) offer precision across –40°C to 125°C. Autozero offset calibration also eliminates the effects of power-supply variations and even common-mode variations.

Along with the lowest noise in its class, the MAX44251 high-speed (10MHz) autozero op amp adds high-precision capabilities. The device's power-supply rejection ratio (PSRR), common-mode rejection ratio (CMRR), and large-signal voltage gain (AVOL) exceed 135 dB at 25°C. This accuracy over its wide voltage range increases the flexibility of the design and minimizes the errors during signal conditioning.

The MAX44521 is rated over the –40°C to 125°C temperature range and is available in 8-pin SOT23 and uMAX packages. Pricing starts at $1.48 (1000-up, FOB USA).

About Maxim Integrated Products
Maxim makes highly integrated analog and mixed-signal semiconductors. Maxim reported revenue of approximately $2.5 billion for fiscal 2011.

Add Comment




Twitter Feed

Find It Fix It Forum

Sensors invites you to join the Findit-Fixit Forum, where you can get answers to your sensing questions—concerning technologies, products, methods, applications, and services--and also offer help to your fellow engineers. The Forum covers all kinds of topics, from the basics to the extraordinary.

Join the discussion!

© Copyright 2016 Questex, LLC. All Rights Reserved. Sensorsmag. Privacy Policy | Terms of Use

If you are having technical difficulties or considerations, please contact the webmaster.