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Ultra-Small, +1.8V, µPower, Rail-to-Rail I/O Op Amps

1.8V Op Amps Deliver 120dB Avol and Drive 2-kilohm loads with 0.017% THD+N

Product Details

The MAX4291/MAX4292/MAX4294 family of micropower operational amplifiers operates from a 1.8V to 5.5V single supply or ±0.9V to ±2.75V dual supplies and has Rail-to-Rail input/output capabilities. These amplifiers provide a 500kHz gain-bandwidth product and 120dB open-loop voltage gain while using only 100µA of supply current per amplifier. The combination of low input offset voltage (±200µV) and high open-loop gain makes them ideal for low-power/low-voltage, high-precision portable applications.

The MAX4291/MAX4292/MAX4294 have an input common-mode range that extends to each supply rail, and their outputs swing to within 46mV of the rails with a 2kΩ load. Although the minimum operating voltage is specified at 1.8V, these devices typically operate down to 1.5V. The combination of ultra-low-voltage operation, rail-to-rail inputs/output, and low-power consumption makes these devices ideal for any portable/two-cell battery-powered system.

The single MAX4291 is offered in an ultra-small 5-pin SC70 package. The dual MAX4292 is offered in a space-saving 8-bump, 1.5mm x 1.5mm footprint, ultra chip-scale package (UCSP™).

Key Features

  • Ultra-Low Voltage Operation—Guaranteed Down to 1.8V
  • 100µA Supply Current per Amplifier
  • 500kHz Gain-Bandwidth Product
  • 120dB Open-Loop Voltage Gain (RL = 100kΩ)
  • 0.017% Total Harmonic Distortion Plus Noise (THD + N) at 1kHz
  • Rail-to-Rail Input Common-Mode Range
  • Rail-to-Rail Output Drives 2kΩ Load
  • No Phase Reversal for Overdriven Inputs
  • Unity-Gain Stable for Capacitive Loads up to 100pF
  • 200µV Input Offset Voltage (MAX4292/MAX4294)
  • Single in Small 5-Pin SC70
  • Available in Ultra-Small Packages:
    • 5-Pin SC70 (MAX4291)
    • 8-Bump UCSP (MAX4292)

Applications/Uses

  • 2-Cell Battery-Operated Systems
  • Automotive Sensors
  • Base Station/Wireless Infrastructure
  • Battery-Powered Applications
  • Cell Phones
  • Computers: Desktops, Workstations, and Servers
  • Computers: Motherboards
  • Computers: Notebook
  • Digital Scales/Strain Gauges
  • GPS Solutions
  • MP3 Docking Stations: Mid Level
  • Portable Electronic Equipment
  • Programmable Logic Controllers (PLCs)
  • Sensor Amplifiers
  • Set-Top Boxes
  • Strain Gauges
Parametric specs for Operational Amplifiers (Op Amps)
Unity Gain BW (MHz) (typ) 0.5
Input IBIAS (nA) (max) 55
VOS (µV) (max) 2500
VSUPPLY (Total) (V) (min) 1.8
VSUPPLY (Total) (V) (max) 5.5
# Amplifiers 2
Rail to Rail Input/Output
Package/Pins SOIC (N)/8
UCSP (B)/9
UMAX/8
Budgetary
Price (See Notes)
$1.61 @1k
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Simplified Block Diagram

MAX4291, MAX4292, MAX4294: Pin Configurations MAX4291, MAX4292, MAX4294: Pin Configurations Zoom icon

Technical Docs

Design & Development

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SIMULATION MODELS

MAX4292 Orcad Library

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SIMULATION MODELS

MAX4292SLEW Test Circuit

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SIMULATION MODELS

MAX4292AVOL Test Circuit

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SIMULATION MODELS

MAX4292GBW Test Circuit

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SIMULATION MODELS

MAX4292 Macromodel

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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 (Op Amps)
Unity Gain BW (MHz) (typ) 0.5
Input IBIAS (nA) (max) 55
VOS (µV) (max) 2500
VSUPPLY (Total) (V) (min) 1.8
VSUPPLY (Total) (V) (max) 5.5
# Amplifiers 2
Rail to Rail Input/Output
Package/Pins SOIC (N)/8
UCSP (B)/9
UMAX/8
Budgetary
Price (See Notes)
$1.61 @1k

Key Features

  • Ultra-Low Voltage Operation—Guaranteed Down to 1.8V
  • 100µA Supply Current per Amplifier
  • 500kHz Gain-Bandwidth Product
  • 120dB Open-Loop Voltage Gain (RL = 100kΩ)
  • 0.017% Total Harmonic Distortion Plus Noise (THD + N) at 1kHz
  • Rail-to-Rail Input Common-Mode Range
  • Rail-to-Rail Output Drives 2kΩ Load
  • No Phase Reversal for Overdriven Inputs
  • Unity-Gain Stable for Capacitive Loads up to 100pF
  • 200µV Input Offset Voltage (MAX4292/MAX4294)
  • Single in Small 5-Pin SC70
  • Available in Ultra-Small Packages:
    • 5-Pin SC70 (MAX4291)
    • 8-Bump UCSP (MAX4292)

Applications/Uses

  • 2-Cell Battery-Operated Systems
  • Automotive Sensors
  • Base Station/Wireless Infrastructure
  • Battery-Powered Applications
  • Cell Phones
  • Computers: Desktops, Workstations, and Servers
  • Computers: Motherboards
  • Computers: Notebook
  • Digital Scales/Strain Gauges
  • GPS Solutions
  • MP3 Docking Stations: Mid Level
  • Portable Electronic Equipment
  • Programmable Logic Controllers (PLCs)
  • Sensor Amplifiers
  • Set-Top Boxes
  • Strain Gauges

Description

The MAX4291/MAX4292/MAX4294 family of micropower operational amplifiers operates from a 1.8V to 5.5V single supply or ±0.9V to ±2.75V dual supplies and has Rail-to-Rail input/output capabilities. These amplifiers provide a 500kHz gain-bandwidth product and 120dB open-loop voltage gain while using only 100µA of supply current per amplifier. The combination of low input offset voltage (±200µV) and high open-loop gain makes them ideal for low-power/low-voltage, high-precision portable applications.

The MAX4291/MAX4292/MAX4294 have an input common-mode range that extends to each supply rail, and their outputs swing to within 46mV of the rails with a 2kΩ load. Although the minimum operating voltage is specified at 1.8V, these devices typically operate down to 1.5V. The combination of ultra-low-voltage operation, rail-to-rail inputs/output, and low-power consumption makes these devices ideal for any portable/two-cell battery-powered system.

The single MAX4291 is offered in an ultra-small 5-pin SC70 package. The dual MAX4292 is offered in a space-saving 8-bump, 1.5mm x 1.5mm footprint, ultra chip-scale package (UCSP™).

Simplified Block Diagram

MAX4291, MAX4292, MAX4294: Pin Configurations MAX4291, MAX4292, MAX4294: Pin Configurations 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.