1. Products
  2. Optical Communications and Sensing
  3. Fiber Optic Data
  4. Fiber Photodiode Current Monitors
  5. MAX4004


Features and Benefits

  • Wide Reference Current Dynamic Range
    • Guaranteed 250nA to 2.5mA with 5% Accuracy
    • Extended 10nA to 10mA with 10% Monitor Accuracy
  • Current (MAX4004) or Voltage (MAX4006) Monitor Output
  • Reference Current-Limit Protection (20mA, typ)
  • Voltage Clamp Protects Subsequent Output Circuitry
  • +2.7V to +22V Wide Voltage Range Operation
  • 6-Pin SOT23 Packages

Product Details

The MAX4004/MAX4006 precision, high-side, current monitors are specifically designed for monitoring photodiode current in fiber applications. They offer a connection point for the reference current and a monitor output that produces a signal proportional to the reference current. The monitor output of the MAX4004 is a current proportional to the reference current. The monitor output of the MAX4006 is a voltage proportional to the reference current. The current monitors have six decades of dynamic range and monitor reference current of 250nA to 2.5mA with better than 5% accuracy. The photodiode current can be monitored from 10nA to 10mA with reduced accuracy.

The MAX4004/MAX4006 accept a +2.7V to +22V supply voltage, suitable for PIN photodiode applications. (For higher voltage applications, refer to the MAX4007/MAX4008 data sheet.) Internal current limiting (20mA, typ) protects the device against short-circuit-to-ground or excessive current conditions. A clamp diode protects the monitor output from overvoltage. Additionally, these devices feature thermal shutdown if the die temperature reaches +150°C.

The MAX4004/MAX4006 are available in tiny, space-saving 6-pin SOT23 packages, and operate over the extended temperature range of -40°C to +85°C.


  • Consumer Electronics
  • Current-to-Voltage Conversion
  • Laboratory Instrumentation
  • Level Translation
  • Medical Instrumentation
  • Photodiode Current-Monitoring Systems
  • Portable Instrumentation

Product Lifecycle icon-recommended 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.

Tools & Simulations


Design 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.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
MAX4004EUT+ Material Declaration Reliability Data Small-Outline Transistor Package
MAX4004EUT+T Material Declaration Reliability Data Small-Outline Transistor Package
Wafer Fabrication Data MAX4004 Reliability Data

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