Maxim > Products > Amplifiers > MAX492, MAX494, MAX495

MAX492, MAX494, MAX495

Single/Dual/Quad, Micropower, Single-Supply, Rail-to-Rail Op Amps

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Status Explanations for product status codes

Part Number Status
MAX492 Active: In Production. But some versions of the family are Not Recommended for New Designs. See Ordering Information.
MAX494 Active: In Production.
MAX495 This product is No Longer Available. See Ordering Information for recommended replacements.


The dual MAX492, quad MAX494, and single MAX495 operational amplifiers combine excellent DC accuracy with rail-to-rail operation at the input and output. Since the common-mode voltage extends from VCC to VEE, the devices can operate from either a single supply (+2.7V to +6V) or split supplies (±1.35V to ±3V). Each op amp requires less than 150µA supply current. Even with this low current, the op amps are capable of driving a 1kΩ load, and the input referred voltage noise is only 25nV/√Hz. In addition, these op amps can drive loads in excess of 1nF.

The precision performance of the MAX492/MAX494/MAX495, combined with their wide input and output dynamic range, low-voltage single-supply operation, and very low supply current, makes them an ideal choice for battery-operated equipment and other low-voltage applications. The MAX492/MAX494/MAX495 are available in DIP and SO packages in the industry-standard op-amp pin configurations. The MAX495 is also available in the smallest 8-pin SO: the µMAX® package.

Data Sheet

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Key Features

  • Low-Voltage Single-Supply Operation (+2.7V to +6V)
  • Rail-to-Rail Input Common-Mode Voltage Range
  • Rail-to-Rail Output Swing
  • 500kHz Gain-Bandwidth Product
  • Unity-Gain Stable
  • 150µA Max Quiescent Current per Op Amp
  • No Phase Reversal for Overdriven Inputs
  • 200µV Offset Voltage
  • High Voltage Gain (108dB)
  • High CMRR (90dB) and PSRR (110dB)
  • Drives 1kΩ Load
  • Drives Large Capacitive Loads
  • MAX495 Available in µMAX Package-8-Pin SO
  • Dual, precision, rail-to-rail input and output (MAX492)
  • Quad, precision, rail-to-rail input and output (MAX494)
  • Single, precision, rail-to-rail input and output (MAX495)


  • Battery-Powered Applications
  • Data Acquisition
  • Low-Voltage Applications
  • Portable Equipment
  • Signal Conditioning

Key Specifications:

Operational Amplifiers
Part Number Amps. Rail to Rail VSUPPLY (Total)
ICC per Amp.
Unity Gain BW
Slew Rate
min max typ max typ typ max typ typ < See Notes
MAX492  2 Input/Output 2.7 6 150 500 90 110 60 0.5 0.2 25 $4.17 @1k
MAX494  4 $4.52 @1k
See All Operational Amplifiers (163)

Pricing Notes:

This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX492, MAX495: Pin Configuration
Pin Configuration

MAX494: Pin Configuration
Pin Configuration

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Document Ref.: 19-0265 Rev 2; 1996-09-01
This page last modified: 2009-11-10