High-Accuracy, 76V, High-Side Current Monitors in SOT23

High-Voltage, 76V, High-Side Current Monitors Sense Currents from 10nA to 10mA

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The MAX4007/MAX4008 precision, high-side, high-voltage 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 MAX4007 is a current proportional to the reference current. The monitor output of the MAX4008 is a voltage proportional to the reference current. The current monitors have six decades of dynamic range and monitor reference currents of 250nA to 2.5mA with better than 5% accuracy. The photodiode current can be monitored from 10nA to 10mA with reduced accuracy.

The MAX4007/MAX4008 accept a supply voltage of +2.7V to +76V, suitable for APD or PIN photodiode applications. Internal current limiting (20mA, typ) protects the devices against short circuit to ground. A clamp diode protects the monitor output from overvoltage. Additionally, these devices feature thermal shutdown if the die temperature reaches +150°C.

The MAX4007/MAX4008 are available in tiny, spacesaving 6-pin SOT23 packages, and operate over the extended temperature range of -40°C to +85°C.
MAX4007, MAX4008: Typical Application Circuit MAX4007, MAX4008: Typical Application Circuit Enlarge+

Key Features

  • Wide Reference Current Dynamic Range
      Guaranteed 250nA to 2.5mA with 5% Monitor Accuracy
    • Extended 10nA to 10mA with 10% Monitor Accuracy
  • Current (MAX4007) or Voltage (MAX4008) Monitor Outputs
  • Reference Current-Limit Protection (20mA, typ)
  • Voltage Clamp Protects Subsequent Output Circuitry
  • +2.7V to +76V Wide Voltage Range Operation
  • 6-Pin SOT23 Packages


  • Consumer Electronics
  • Current-to-Voltage Conversion
  • Laboratory Instrumentation
  • Level Translation
  • Medical Instrumentation
  • Photodiode Current-Monitoring Systems
  • Portable Instrumentation
Part NumberPhoto Diode Appl.IDIODEIDIODEVBIAS
Package/PinsOper. Temp.
minmaxminmaxtypto 10kHzto 10kHzSee Notes
10nA (-113dBm)10mA (+7dBm)2.77690-9.2
-40 to +85$1.80 @1k
MAX4008 1.3-
See All Fiber Photodiode Current Monitors (9)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Technical Documents

Reference Schematic 4122 Simple Regulator Provides Constant Voltage for High-Side Current Monitors

Quality and Environmental Data

Product Reliability Reports: MAX4008.pdf 
Lead-Free Package Tin (Sn) Whisker Reports
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >


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