High-Accuracy, High-Side Current Monitors
The MAX4004/MAX4006 precision, high-side, current
monitors are specifically designed for monitoring photo-
diode 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 propor-
tional to the reference current. The monitor output of the
MAX4006 is a voltage proportional to the reference cur-
rent. 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 sup-
ply 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
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.
●● Photodiode Current-Monitoring Systems
●● Portable Instrumentation
●● Medical Instrumentation
●● Laboratory Instrumentation
●● Consumer Electronics
●● Current-to-Voltage Conversion
●● Level Translation
●● Wide Reference Current Dynamic Range
• Guaranteed 250nA to 2.5mA with 5% Accuracy
• Extended 10nA to 10mA with 10% Monitor
●● Current (MAX4004) or Voltage (MAX4006) Monitor
●● Reference Current-Limit Protection (20mA, typ)
●● Voltage Clamp Protects Subsequent Output Circuitry
●● +2.7V to +22V Wide Voltage Range Operation
●● 6-Pin SOT23 Packages
Note: All devices are specified over the -40°C to +85°C operat-
ing temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
GND 2 MAX4006 5 N.C.
Typical Operating Circuit appears at end of data sheet.
19-2742; Rev 3; 6/15