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36V, Precision, Low-Power, 90µA, Single/Quad/Dual Op Amps

Precision, Low-Power Performance in High-Voltage Applications

Product Details

The MAX44244/MAX44245/MAX44248 family of parts provide ultra-precision, low-noise, zero-drift single/quad/ dual operational amplifiers featuring very low-power operation with a wide supply range. The devices incorporate a patented auto-zero circuit that constantly measures and compensates the input offset to eliminate drift over time and temperature as well as the effect of 1/f noise. These devices also feature integrated EMI filters to reduce high-frequency signal demodulation on the output. The op amps operate from either a single 2.7V to 36V supply or dual ±1.35V to ±18V supply. The devices are unity-gain stable with a 1MHz gain-bandwidth product and a low 90µA supply current per amplifier.

The low offset and noise specifications and high supply range make the devices ideal for sensor interfaces and transmitters.

The devices are available in µMAX®, SO, SOT23, and TSSOP packages and are specified over the -40°C to +125°C automotive operating temperature range.

Key Features

  • Reduces Power for Sensitive Precision Applications
    • Low 90µA Quiescent Current per Amplifier
  • Eliminates the Cost of Calibration with Increased Accuracy with Maxim’s Patented Autozero Circuitry
    • Very Low Input Voltage Offset 7.5µV (max)
    • Low 30nV/NC Offset Drift (max)
  • Low Noise Ideal for Sensor Interfaces and Transmitters
    • 50nV/√Hz at 1kHz
    • 0.5µVP-P from 0.1Hz to 10Hz
  • 1MHz Gain-Bandwidth Product
    • EMI Suppression Circuitry
  • Rail-to-Rail Output
  • Wide Supply for High-Voltage Front Ends
    • 2.7V to 36V Supply Range
  • µMAX, SO, SOT23, TSSOP Packages

Applications/Uses

  • 4-20mA and 0 to 10V Transmitters
  • PLC Analog I/O Modules
  • Portable Medical Devices
  • Sensors Interfaces
  • Weight Scales
Parametric specs for Operational Amplifiers
Unity Gain BW (MHz) (typ) 1
Input IBIAS (nA) (max) 0.3
VOS (µV) (max) 7.5
VSUPPLY (Total) (V) (min) 2.7
VSUPPLY (Total) (V) (max) 36
# Amplifiers 1
Rail to Rail Output Only
Package/Pins SOT23/5
UMAX/8
Budgetary
Price (See Notes)
$1.39 @1k
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Simplified Block Diagram

MAX44244: Typical Operating Circuit MAX44244: Typical Operating Circuit Zoom icon

Design & Development

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Description

The MAX44248 evaluation kit (EV kit) provides a proven design to evaluate the MAX44248 low-power, dual op amps in an 8-pin µMAX® package. The EV kit circuit is preconfigured as noninverting amplifiers, but can be adapted to other topologies by changing a few components. The component pads use a 0805 package, making them easy to solder and replace. The EV kit comes with a MAX44248AUA+ installed.

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Features

  • Accommodates Multiple Op-Amp Configurations
  • Component Pads Allow for Sallen-Key Filter
  • Accommodates Easy-to-Use 0805 Components
  • Proven PCB Layout
  • Fully Assembled and Tested

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SIMULATION MODELS

MAX44244 Orcad Library

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Support & Training

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Parameters

Parametric specs for Operational Amplifiers
Unity Gain BW (MHz) (typ) 1
Input IBIAS (nA) (max) 0.3
VOS (µV) (max) 7.5
VSUPPLY (Total) (V) (min) 2.7
VSUPPLY (Total) (V) (max) 36
# Amplifiers 1
Rail to Rail Output Only
Package/Pins SOT23/5
UMAX/8
Budgetary
Price (See Notes)
$1.39 @1k

Key Features

  • Reduces Power for Sensitive Precision Applications
    • Low 90µA Quiescent Current per Amplifier
  • Eliminates the Cost of Calibration with Increased Accuracy with Maxim’s Patented Autozero Circuitry
    • Very Low Input Voltage Offset 7.5µV (max)
    • Low 30nV/NC Offset Drift (max)
  • Low Noise Ideal for Sensor Interfaces and Transmitters
    • 50nV/√Hz at 1kHz
    • 0.5µVP-P from 0.1Hz to 10Hz
  • 1MHz Gain-Bandwidth Product
    • EMI Suppression Circuitry
  • Rail-to-Rail Output
  • Wide Supply for High-Voltage Front Ends
    • 2.7V to 36V Supply Range
  • µMAX, SO, SOT23, TSSOP Packages

Applications/Uses

  • 4-20mA and 0 to 10V Transmitters
  • PLC Analog I/O Modules
  • Portable Medical Devices
  • Sensors Interfaces
  • Weight Scales

Description

The MAX44244/MAX44245/MAX44248 family of parts provide ultra-precision, low-noise, zero-drift single/quad/ dual operational amplifiers featuring very low-power operation with a wide supply range. The devices incorporate a patented auto-zero circuit that constantly measures and compensates the input offset to eliminate drift over time and temperature as well as the effect of 1/f noise. These devices also feature integrated EMI filters to reduce high-frequency signal demodulation on the output. The op amps operate from either a single 2.7V to 36V supply or dual ±1.35V to ±18V supply. The devices are unity-gain stable with a 1MHz gain-bandwidth product and a low 90µA supply current per amplifier.

The low offset and noise specifications and high supply range make the devices ideal for sensor interfaces and transmitters.

The devices are available in µMAX®, SO, SOT23, and TSSOP packages and are specified over the -40°C to +125°C automotive operating temperature range.

Simplified Block Diagram

MAX44244: Typical Operating Circuit MAX44244: Typical Operating Circuit Zoom icon

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