Features and Benefits
- 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
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.
- 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
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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