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MAX9945
Analog Amplifiers MAX9945
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MAX9945

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38V, Low-Noise, MOS-Input, Low-Power Op Amp

Great Combination of Low Power and Low Noise in a Small Package

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Product Details

See parametric specs for Operational Amplifiers

Key Features

See parametric specs for Operational Amplifiers
Parametric specs for Operational Amplifiers
Unity Gain BW (MHz) (typ) 3
Input IBIAS (nA) (max) 0.00015
VOS (µV) (max) 5000
VSUPPLY (Total) (V) (min) 4.75
VSUPPLY (Total) (V) (max) 38
# Amplifiers 1
Rail to Rail Output Only
Package/Pins TDFN/6
UMAX/8
Budgetary
Price (See Notes) 		1.04
See parametric specs for Operational Amplifiers
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Simplified Block Diagram

Technical Docs

Data Sheet 38V, Low-Noise, MOS-Input, Low-Power Op Amp Dec 17, 2010
App Note Stabilize Transimpedance Amplifier Circuit Design | Maxim Integrated
Tutorial Overview of Sensor Signal Paths
Tutorial Tutorial: Improve Sensor Performance and SNR in Pulse Oximeter Designs | Maxim Integrated

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 .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.

Parameters

Parametric specs for Operational Amplifiers
Unity Gain BW (MHz) (typ) 3
Input IBIAS (nA) (max) 0.00015
VOS (µV) (max) 5000
VSUPPLY (Total) (V) (min) 4.75
VSUPPLY (Total) (V) (max) 38
# Amplifiers 1
Rail to Rail Output Only
Package/Pins TDFN/6
UMAX/8
Budgetary
Price (See Notes) 		1.04
See parametric specs for Operational Amplifiers

Key Features

  • +4.75V to +38V Single-Supply Voltage Range
  • ±2.4V to ±19V Dual-Supply Voltage Range
  • Rail-to-Rail Output Voltage Swing
  • 400µA Low Quiescent Current
  • 50fA Low Input Bias Current
  • 1fA/ Low Input Current Noise
  • 15nV/ Low Noise
  • 3MHz Unity-Gain Bandwidth
  • Wide Temperature Range from -40°C to +125°C
  • Available in Space-Saving, 6-Pin TDFN Package (3mm x 3mm)

Applications/Uses

  • Active Filters and Signal Processing
  • Automatic Test Equipment (ATE)
  • Chemical Sensor Interface
  • Displays: Industrial, Front Panel, and Instrumentation
  • High-Performance Audio Line Out
  • Industrial Sensors and Instrumentation
  • Industrial: Process Measurement and Control
  • Medical Pulse Oximetry
  • Panel Meters
  • Photodiode Sensor Interface
  • Power Meters
  • Programmable Logic Controllers (PLCs)

Description

The MAX9945 operational amplifier features an excellent combination of low operating power and low input voltage noise. In addition, MOS inputs enable the MAX9945 to feature low input bias currents and low input current noise. The device accepts a wide supply voltage range from 4.75V to 38V and draws a low 400µA quiescent current. The MAX9945 is unity-gain stable and is capable of rail-to-rail output voltage swing.

The MAX9945 is ideal for portable medical and industrial applications that require low noise analog front-ends for performance applications such as photodiode transimpedance and chemical sensor interface circuits.

The MAX9945 is available in both an 8-pin µMAX® and a space-saving, 6-pin TDFN package, and is specified over the automotive operating temperature range (-40°C to +125°C).

Simplified Block Diagram

MAX9945: Typical Operating Circuit MAX9945: Typical Operating Circuit Zoom icon

Technical Docs

Data Sheet 38V, Low-Noise, MOS-Input, Low-Power Op Amp Dec 17, 2010
App Note Stabilize Transimpedance Amplifier Circuit Design | Maxim Integrated
Tutorial Overview of Sensor Signal Paths
Tutorial Tutorial: Improve Sensor Performance and SNR in Pulse Oximeter Designs | Maxim Integrated

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 .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.