MAX4206ETE+

The MAX4206ETE+ is a precision transimpedance logarithmic amplifier with over 5 decades of dynamic range in 16 pin TQFN package. It computes log ratio of an input current relative to a reference current (externally or internally generated) and provides a corresponding voltage output with default 0.25V/decade scale factor. The device operates from single 2.7V to 11V supply or from dual ±2.7V to ±5.5V supplies and is capable of measuring five decades of input current across a 10nA to 1mA range. The uncommitted op-amp of MAX4206 can be used for a variety of functions including filtering noise, adding offset and adding additional gain. A 0.5V reference is also included to generate an optional precision current reference using an external resistor which adjusts the log intercept of MAX4206. The output offset voltage and adjustable scale factor are also set using external resistors. The MAX4206 is used in photodiode current monitoring applications.

• Single supply capability reduces system power supply requirements
• Operating temperature range from -40°C to 85°C
• Supply current of 3.9mA at TA = +25°C with single supply operation
• Monotonic over 1nA to 1mA range and input offset voltage of 1mV
• Adjustable output scale factor and adjustable output offset voltage
• Log conformity error of ±2mV at TA = +25°C with single supply operation
• Common mode voltage input range from 0.5V to 1V
• Unity gain bandwidth of 5MHz and slew rate of 12V/µs (LOGV2 BUFFER) with single supply operation
• Small package and few external components saves space and simplifies design
• Internal 10nA to 10µA reference current source

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Signal Processing, Portable Devices, Medical

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