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SOT23, Rail-to-Rail, Fixed-Gain GainAmps/Open-Loop Op Amps

Product Details

Key Features

Applications/Uses

Simplified Block Diagram

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Key Features

  • GainAmp Family Provides Internal Precision Gain-Setting Resistors in SOT23 (MAX4174/5)
  • 0.1% Gain Accuracy (RF/RG) (MAX4174/5, MAX4274/5)
  • 54 Standard Gains Available (MAX4174/5, MAX4274/5)
  • Open-Loop Unity-Gain-Stable Op Amps (MAX4281/2/4)
  • Rail-to-Rail Outputs Drive 1kΩ Load
  • Internal VCC/2 Biasing (MAX4175/MAX4275)
  • +2.5V to +5.5V Single Supply
  • 300µA Supply Current
  • Up to 23MHz GBW Product
  • Fault-Protected Inputs Withstand ±17V
  • Stable with Capacitive Loads Up to 470pF with No Isolation Resistor

Applications/Uses

  • Cellular Handsets
  • Digital Cameras (DIGICAMs)
  • Glucose Meters
  • GPS Solutions
  • Infrared Receivers for Remote Controls
  • Instruments, Terminals, and Bar-Code Readers
  • IP Camera
  • Keyless Entry
  • Low-Side Current-Sense Amplifiers
  • MP3 and Portable Media Players
  • Photodiode Preamps
  • Portable Instruments
  • Smart-Card Readers

Description

The MAX4174/MAX4175/MAX4274/MAX4275 GainAmp family combines a low-cost rail-to-rail op amp with precision internal gain-setting resistors and VCC/2 biasing. Factory-trimmed on-chip resistors decrease design size, cost, and layout, and provide 0.1% gain accuracy. Fixed inverting gains from -0.25V/V to -100V/V or noninverting gains from +1.25V/V to +101V/V are available. These devices operate from a single +2.5V to +5.5V supply and consume only 300µA. GainAmp amplifiers are optimally compensated for each gain version, achieving exceptional GBW products up to 23MHz (AV = +25V/V to +101V/V). High-voltage fault protection withstands µ17V at either input without excessive current draw.

Three versions are available in this amplifier family: single/dual/quad open-loop, unity-gain stable (MAX4281/MAX4282/MAX4284); single/dual fixed gain (MAX4174/MAX4274); and single/dual fixed gain plus internal VCC/2 bias at the noninverting input (MAX4175/MAX4275), which simplifies input biasing in single-supply designs. The input common-mode voltage range of the open-loop amplifiers extends from 150mV below the negative supply to within 1.2V of the positive supply. The outputs can swing rail-to-rail and drive a 1kΩ load while maintaining excellent DC accuracy. The amplifier is stable for capacitive loads up to 470pF.

Simplified Block Diagram

MAX4174, MAX4175, MAX4274, MAX4275, MAX4281, MAX4282, MAX4284: Typical Operating Circuit MAX4174, MAX4175, MAX4274, MAX4275, MAX4281, MAX4282, MAX4284: Typical Operating Circuit 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 .