MAX4194:Micropower, Single-Supply, Rail-to-Rail, Precision Instrumentation Amplifiers

The MAX4194 is a variable-gain precision instrumentation amplifier that combines Rail-to-Rail; single-supply operation, outstanding precision specifications, and a high gain bandwidth. This amplifier is also offered in three fixed-gain versions: the MAX4195 (G = +1V/V), the MAX4196 (G = +10V/V), and the MAX4197 (G = +100V/V). The fixed-gain instrumentation amplifiers feature a shutdown function that reduces the quiescent current to 8µA. A traditional three operational amplifier configuration is used to achieve maximum DC precision. The MAX4194–MAX4197 have rail-to-rail outputs and inputs that can swing to 200mV below the negative rail and to within 1.1V of the positive rail. All parts draw only 93µA and operate from a single +2.7V to +7.5V supply or from dual ±1.35V to ±3.75V supplies. These amplifiers are offered in 8-pin SO packages and are specified for the extended temperature range (-40°C to +85°C). See the MAX4198/MAX4199 data sheet for single-supply, precision differential amplifiers.

Key Features
  • Low Power Consumption Is Ideal for Remote-Sensing and Battery-Powered Applications
    • +2.7V Single-Supply Operation
    • Low Power Consumption
      • 93µA Supply Current
      • 8µA Shutdown Current (MAX4195/MAX4196/MAX4197)
  • Precision Specifications Maximize Sensor Peformance
    • High Common-Mode Rejection: 115dB (G = +10V/V)
    • Input Common-Mode Range Extends 200mV Below GND
    • Low 50µV Input Offset Voltage (G ≥ +100V/V)
    • Low ±0.01% Gain Error (G = +1V/V)
    • 250kHz -3dB Bandwidth (G = +1V/V, MAX4194)
    • Rail-to-Rail Outputs
MAX4194, MAX4195, MAX4196, MAX4197: Pin Configurations
MAX4194, MAX4195, MAX4196, MAX4197: Pin Configurations
Applications/Uses
  • 4mA to 20mA Loop Transmitters
  • Battery-Powered/Portable Equipment
  • Bridge Amplifier
  • Data Acquisition Systems
  • Medical Equipment
  • Thermocouple Amplifiers
  • Transducer Interface
DataSheet
titleDownload file
MAX4194-MAX4197 Data SheetMAX4194-MAX4197.pdf
Parametrics
Part NumberArchitectureAmps.VCMVRRail to RailAV
(V/V)
VSUPPLY (Total)
(V)
VSUPPLY (Total)
(V)
ICC per Amp.
(mA)
ICC per Amp.
(mA)
VOS
(µV)
CMRR @DC
(dB)
PSRR @DC
(dB)
Input IBIAS
(nA)
Unity Gain BW
(MHz)
Slew Rate
(V/µs)
VCMVR
(V)
en
(nV/√Hz)
in
(pA/√Hz)
Noise Spec'd @Low Pwr. ShutdnOper. Temp.
(°C)
Package/PinsBudgetary
Price
to Neg. Railminmaxtypmaxmaxtyptypmaxtyptyp<See Notes
MAX4194Classic 3 Op. Amp.1NoOutput Only1 to 100002.77.50.0930.11450115120200.250.06VEE+0.2 to VCC-1.1720.110kHzNo-40 to +85SOIC(N)/8$2.31 @1k
MAX41951950.22VEE-0.2 to VCC-1.172SOIC(N)/8$2.74 @1k
MAX4196101150.34VEE+0.2 to VCC-1.131SOIC(N)/8$2.31 @1k
MAX41971001150.003VEE+0.2 to VCC-1.18.7SOIC(N)/8$2.58 @1k
Quality and Environmental Data
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX4194ESANo Longer AvailableMAX4194ESA+SOIC(N),;8 pin;30.9 mm²-40°C to +85°CNo
MAX4194ESA+ActiveSOIC(N),;8 pin;30.9 mm²-40°C to +85°CLead Free
MAX4194ESA+TActiveSOIC(N),;8 pin;30.9 mm²-40°C to +85°CLead Free
MAX4194ESA-G069No Longer AvailableN.SO;-40°C to +85°CSee data sheet
MAX4194ESA-TNo Longer AvailableMAX4194ESA+TSOIC(N),;8 pin;30.9 mm²-40°C to +85°CNo
MAX4194ESA-TG069No Longer AvailableN.SO;-40°C to +85°CSee data sheet
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