Product News: Electronic Components & Devices

Dual Op Amp extends maintenance system uptime.

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Press Release Summary:

November 15, 2011 - With autozero technology, 20 V Model MAX44251 offers continuous self-calibration, ensuring system accuracy over time, temperature, and power supply variations. Less than 6 µV initial offset over 2.7-20 V operating range minimizes errors during signal conditioning. Unit's 1.15 mA current consumption per channel offers 10 MHz gain bandwidth and 5.9 nV/rt-Hz input referred voltage noise. Operating from -40 to +125°C, op amp is suited for pressure sensors, strain gauges, and medical instrumentation.

Original Press Release

High-Voltage and Lowest Noise, Autozero Op Amp

Press release date: November 14, 2011

Extends System Uptime and Improves Sensor Performance

SUNNYVALE, Calif., -- Maxim Integrated Products (Nasdaq:MXIM) introduces the MAX44251 a 20V, 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 (< 6uv="" initial="" offset)="" over="" the="" wide="" 2.7v="" to="" 20v="" 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="" 1.15ma="" current="" consumption="" per="" channel="" offers="" excellent="" 10mhz="" gain="" bandwidth="" and="" the="" industry's="" lowest="" noise="" (5.9nv/rt-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="">

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 6uV (max) and voltage temperature drift of 19nV/degree Celsius (max) offer precision across -40 degrees C to +125 degrees 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 135dB at +25 degrees 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 degrees C to +125 degrees C temperature range and is available in 8-pin SOT23 and uMAX(R) packages.

Pricing starts at $1.48 (1000-up, FOB USA). For more information on Maxim's industrial signal-chain solutions please visit:

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

uMAX is a registered trademark of Maxim Integrated Products, Inc.

Drew Ehrlich
Public Relations

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