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

Innovative Combination of High Voltage (2.7V to 20V) Capability, Industry's Lowest Noise, and Autozero Precision in a SOT23 Package

Product Details

The MAX44250/MAX44251/MAX44252 are 20V, ultra-precision, low-noise, low-drift amplifiers that offer nearzero DC offset and drift through the use of patented auto-correlating 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 single, dual, and quad devices feature rail-to-rail outputs, operate from a single 2.7V to 20V supply or dual ±1.35V to ±10V supplies and consume only 1.15mA per channel, while providing 5.9nV/ 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 123nVP-P noise in 0.1Hz to 10Hz, the ICs are ideally suited for applications requiring ultra-low noise and DC precision such as interfacing with pressure sensors, strain gauges, precision weight scales, and medical instrumentation.

The ICs are available in 5-pin SOT23, 8-pin SOT23, 8-pin µMAX®, and 14-pin SO packages and are rated over the -40°C to +125°C temperature range.

Key Features

  • High Accuracy Enables Precision Signal Chain Acquisition
    • 6µV Input Offset Voltage (max) at Room Temperature
    • TCVOS of 19nV/°C (max)
    • Low 5.9nV/ Input-Referred Voltage Noise
    • 123nVP-P in 0.1Hz to 10Hz
    • 10MHz Gain-Bandwidth Product
    • Rail-to-Rail Output
    • Fast 400ns Settling Time
  • 2.7V to 20V Power-Supply Range Supports Wide Range of Sensors
  • Integrated EMI Filter Reduces Impact of Radio Frequency Interference on Signal Chain Performance

Applications/Uses

  • Load Cell and Bridge Transducer Amplification
  • Medical Instrumentation
  • Precision Instrumentation
  • Pressure Transducers
  • Strain Gauges
Parametric specs for Operational Amplifiers
Unity Gain BW (MHz) (typ) 10
Input IBIAS (nA) (max) 1.3
VOS (µV) (max) 6
VSUPPLY (Total) (V) (min) 2.7
VSUPPLY (Total) (V) (max) 20
# Amplifiers 4
Rail to Rail Output Only
Package/Pins SOIC (N) HYBRID/14
Budgetary
Price (See Notes)
$2.39 @1k
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Simplified Block Diagram

MAX44251, MAX44252: Typical Operating Circuit MAX44251, MAX44252: Typical Operating Circuit Zoom icon

Technical Docs

Design & Development

Click any title below to view the detail page where available.

Description

The MAX44251 evaluation kit (EV kit) provides a proven design to evaluate the MAX44251 dual low-power, low-drift operational amplifier (op amp) in an 8-pin SOT23 package. The EV kit circuit is preconfigured as noninverting amplifiers, but can be adapted to other topologies by changing a few components. Low power, low drift, input offset voltage, and rail-to-rail input/output stages make this device ideal for applications requiring ultra-low noise and DC precision. The component pads accommodate 0805 packages, making them easy to solder and replace. The EV kit comes with a MAX44251AKA+ installed.

View Details

Features

  • Accommodates Multiple Op-Amp Configurations
  • Rail-to-Rail Inputs/Outputs
  • Accomodates Easy-to-Use 0805 Components
  • 2.7V to 20V Power-Supply Range
  • Proven PCB Layout
  • Fully Assembled and Tested

Description

The MAX44250 evaluation kit (EV kit) provides a proven design to evaluate the MAX44250 low-power, low-drift operational amplifier (op amp) in a 5-pin SOT23 package. The EV kit circuit is preconfigured as noninverting amplifiers, but can be adapted to other topologies by changing a few components. Low power, low-drift input offset voltage, and rail-to-rail input/output stages make this device ideal for applications requiring ultra-low noise and DC precision. The component pads accommodate 0805 packages, making them easy to solder and replace. The EV kit comes with a MAX44250AUK+ installed.

View Details

Features

  • Accommodates Multiple Op-Amp Configurations
  • Rail-to-Rail Inputs/Output
  • Accommodates Easy-to-Use 0805 Components
  • Proven PCB Layout
  • Fully Assembled and Tested

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Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal

Parameters

Parametric specs for Operational Amplifiers
Unity Gain BW (MHz) (typ) 10
Input IBIAS (nA) (max) 1.3
VOS (µV) (max) 6
VSUPPLY (Total) (V) (min) 2.7
VSUPPLY (Total) (V) (max) 20
# Amplifiers 4
Rail to Rail Output Only
Package/Pins SOIC (N) HYBRID/14
Budgetary
Price (See Notes)
$2.39 @1k

Key Features

  • High Accuracy Enables Precision Signal Chain Acquisition
    • 6µV Input Offset Voltage (max) at Room Temperature
    • TCVOS of 19nV/°C (max)
    • Low 5.9nV/ Input-Referred Voltage Noise
    • 123nVP-P in 0.1Hz to 10Hz
    • 10MHz Gain-Bandwidth Product
    • Rail-to-Rail Output
    • Fast 400ns Settling Time
  • 2.7V to 20V Power-Supply Range Supports Wide Range of Sensors
  • Integrated EMI Filter Reduces Impact of Radio Frequency Interference on Signal Chain Performance

Applications/Uses

  • Load Cell and Bridge Transducer Amplification
  • Medical Instrumentation
  • Precision Instrumentation
  • Pressure Transducers
  • Strain Gauges

Description

The MAX44250/MAX44251/MAX44252 are 20V, ultra-precision, low-noise, low-drift amplifiers that offer nearzero DC offset and drift through the use of patented auto-correlating 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 single, dual, and quad devices feature rail-to-rail outputs, operate from a single 2.7V to 20V supply or dual ±1.35V to ±10V supplies and consume only 1.15mA per channel, while providing 5.9nV/ 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 123nVP-P noise in 0.1Hz to 10Hz, the ICs are ideally suited for applications requiring ultra-low noise and DC precision such as interfacing with pressure sensors, strain gauges, precision weight scales, and medical instrumentation.

The ICs are available in 5-pin SOT23, 8-pin SOT23, 8-pin µMAX®, and 14-pin SO packages and are rated over the -40°C to +125°C temperature range.

Simplified Block Diagram

MAX44251, MAX44252: Typical Operating Circuit MAX44251, MAX44252: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal