MAX494:Single/Dual/Quad, Micropower, Single-Supply, Rail-to-Rail Op Amps

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.

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)
MAX492, MAX495: Pin Configuration
MAX492, MAX495: Pin Configuration
  • Battery-Powered Applications
  • Data Acquisition
  • Low-Voltage Applications
  • Portable Equipment
  • Signal Conditioning
titleDownload file
MAX492-MAX495 Data SheetMAX492-MAX495.pdf
Part NumberAmps.Rail to RailVSUPPLY (Total)
ICC per Amp.
Unity Gain BW
Slew Rate
minmaxtypmaxtyptypmaxtyptyp<See Notes
$4.17 @1k
$4.52 @1k
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX494CPDNo Longer AvailableMAX494CPD+PDIP(N),;14 pin;158.4 mm²0°C to +70°CNo
MAX494CPD+ActivePDIP(N),;14 pin;158.4 mm²0°C to +70°CLead Free
MAX494CSDNo Longer AvailableMAX494CSD+SOIC(N),;14 pin;54.2 mm²0°C to +70°CNo
MAX494CSD+ActiveSOIC(N),;14 pin;54.2 mm²0°C to +70°CLead Free
MAX494CSD+TActiveSOIC(N),;14 pin;54.2 mm²0°C to +70°CLead Free
MAX494CSD-TNo Longer AvailableMAX494CSD+TSOIC(N),;14 pin;54.2 mm²0°C to +70°CNo
MAX494EPDNo Longer AvailableMAX494EPD+PDIP(N),;14 pin;158.4 mm²-40°C to +85°CNo
MAX494EPD+ActivePDIP(N),;14 pin;158.4 mm²-40°C to +85°CLead Free
MAX494ESDNo Longer AvailableMAX494ESD+SOIC(N),;14 pin;54.2 mm²-40°C to +85°CNo
MAX494ESD+ActiveSOIC(N),;14 pin;54.2 mm²-40°C to +85°CLead Free
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX494ESD+TActiveSOIC(N),;14 pin;54.2 mm²-40°C to +85°CLead Free
MAX494ESD-TNo Longer AvailableMAX494ESD+TN.SO;14 pin-40°C to +85°CSee data sheet
MAX494MJDNo Longer AvailableCDIP(N),;14 pin;162.1 mm²-55°C to +125°CNo
MAX492-MAX495.pdf MAX494
MAX492-MAX495.pdf MAX495