Rainbow-electronics MAX44252 User Manual download pdf

MAX44251/MAX44252

20V, Ultra-Precision, Low-Noise Op Amps

�� Maxim Integrated Products 1

Typical Operating Circuit

19-6000; Rev 0; 10/11

Ordering Information appears at end of data sheet.

For related parts and recommended products to use with this part,

refer to www.maxim-ic.com/MAX44251.related.

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

Functional Diagrams appear at end of data sheet.

General Description

The MAX44251/MAX44252 are 20V, ultra-precision, low-

noise, low-drift amplifiers that offer near-zero DC offset

and drift through the use of patented autocorrelating

zeroing techniques. This method constantly measures

and compensates the input offset, eliminating drift over

time and temperature and the effect of 1/f noise. These

dual and quad devices feature rail-to-rail outputs, oper-

ate from a single 2.7V to 20V supply, and consume only

1.15mA per channel, while providing 5.9nV/√Hz input-

referred voltage noise. The ICs are unity-gain stable with

a gain-bandwidth product of 10MHz.

With excellent specifications such as offset voltage of

6µV (max), drift of 19nV/°C (max), and 123nV

P-P

noise in

0.1Hz to 10Hz, the ICs are ideally suited for applications

requiring ultra-low noise and DC precision such as inter-

facing with pressure sensors, strain gauges, precision

weight scales, and medical instrumentation.

The ICs are available in 8-pin SOT23, 8-pin µMAX

and 14-pin SOIC packages and are rated over the

-40°C to +125°C temperature range.

Benefits and Features

S 2.7V to 20V Power-Supply Range

S Integrated EMI Filter

S 6µV Input Offset Voltage (max) at Room

Temperature

S TCV

of 19nV/°C (max)

S Low 5.9nV/√Hz Input-Referred Voltage Noise

S 123nV

P-P

in 0.1Hz to 10Hz

S Fast 400ns Settling Time

S 10MHz Gain-Bandwidth Product

S Rail-to-Rail Output

S High Accuracy Enables Precision Signal Chain

Acquisition

Applications

Strain Gauges

Pressure Transducers

Medical Instrumentation

Precision Instrumentation

Load Cell and Bridge Transducer Amplification

20V

3.3V

MICRO-

PROCESSOR

OUT

50R

REF

IN-

IN+

BUFFER

MAX44251

MAX11211

MAX6126

MAX44251

20V

1.5V

BUFFER

OUTPUT

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

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MAX44251/MAX44252 1

Summary of Contents

Page 1 - MAX44251/MAX44252

MAX44251/MAX4425220V, Ultra-Precision, Low-Noise Op Amps �� Maxim Integrated Products

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Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are

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Rainbow-electronics MAX44252 User Manual

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Summary of Contents

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