MAX4207
Precision Transimpedance Logarithmic Amplifier with Over 5 Decades of Dynamic Range
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Overview
Features and Benefits
- ±2.7V to ±5.5V Dual-Supply Operation
- 5 Decades of Dynamic Range (10nA to 1mA)
- Monotonic Over a 1nA to 1mA Range
- -0.25V/Decade Internally Trimmed Output Scale Factor
- Adjustable Output Scale Factor
- Adjustable Output Offset Voltage
- Internal 10nA to 10µA Reference Current Source
- Input Amplifiers Summing Nodes at Ground
- Small 16-Pin Thin QFN Package (4mm x 4mm x 0.8mm)
- -40°C to +85°C Operating Temperature Range
- Evaluation Kit Available (Order MAX4206EVKIT)
Product Details
The MAX4207 logarithmic amplifier computes the log ratio of an input current relative to a reference current (externally or internally generated) and provides a corresponding voltage output with a default -0.25V/decade scale factor. The device operates 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 MAX4207's uncommitted op amp 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 the MAX4207. The output-offset voltage and the adjustable scale factor are also set using external resistors.
The MAX4207 is available in a space-saving 16-pin thin QFN package (4mm x 4mm x 0.8mm), and is specified for operation over the -40°C to +85°C extended temperature range.
Applications
- Analog Signal Processing
- Medical Instrumentation
- Photodiode Current Monitoring
- Portable Instrumentation
Product Categories
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
Product Recommendations
MAX4207 Companion Parts
Recommended Related Parts
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 |
|---|---|---|---|---|
| MAX4207ETE+ | Material Declaration | Reliability Data | 16-LFCSP-4X4X0.75 | |
| MAX4207ETE+T | Material Declaration | Reliability Data | 16-LFCSP-4X4X0.75 | |
| Wafer Fabrication Data |
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