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MAX4206
Precision Transimpedance Logarithmic Amplifier with Over 5 Decades of Dynamic Range
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Key Features
Applications/Uses
Parametric specs for Logarithmic Amplifiers
| VSUPPLY (Single) (V) (min) | 2.7 |
| VSUPPLY (Single) (V) (max) | 11 |
| VSUPPLY (Dual) (±V) (min) | 2.7 |
| VSUPPLY (Dual) (±V) (max) | 5.5 |
| ICC (mA) (typ) | 3.9 |
| Log. Slope (mV/ decade) | 250 |
| Dynamic Range (dB) | 100 |
| Package/Pins | TQFN/16 |
| Oper. Temp. (°C) | -40 to +85 |
| Budgetary Price (See Notes) | 4 |
Parametric specs for Transimpedance Amplifiers (TIA)
| Target Oper. Range (Gbps) | <1 |
| Data Rate (Mbps) (min) | 0.005 |
| VSUPPLY (V) | 5 |
| ICC (mA) (typ) | 3.9 |
| Input Noise (nA) (max) | 17000 |
| Bandwidth (MHz) (min) | 5 |
| IIN (µA) (max) | 10 |
| Package/Pins | TQFN/16 |
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Simplified Block Diagram
Technical Docs
| Data Sheet | Precision Transimpedance Logarithmic Amplifier with Over 5 Decades of Dynamic Range | May 19, 2015 |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
Parameters
Parametric specs for Logarithmic Amplifiers
| VSUPPLY (Single) (V) (min) | 2.7 |
| VSUPPLY (Single) (V) (max) | 11 |
| VSUPPLY (Dual) (±V) (min) | 2.7 |
| VSUPPLY (Dual) (±V) (max) | 5.5 |
| ICC (mA) (typ) | 3.9 |
| Log. Slope (mV/ decade) | 250 |
| Dynamic Range (dB) | 100 |
| Package/Pins | TQFN/16 |
| Oper. Temp. (°C) | -40 to +85 |
| Budgetary Price (See Notes) | 4 |
Parametric specs for Transimpedance Amplifiers (TIA)
| Target Oper. Range (Gbps) | <1 |
| Data Rate (Mbps) (min) | 0.005 |
| VSUPPLY (V) | 5 |
| ICC (mA) (typ) | 3.9 |
| Input Noise (nA) (max) | 17000 |
| Bandwidth (MHz) (min) | 5 |
| IIN (µA) (max) | 10 |
| Package/Pins | TQFN/16 |
Key Features
- Single Supply Capability Reduces System Power Supply Requirements
- +2.7V to +11V Single-Supply Operation
- Also Supports ±2.7V to ±5.5V Dual-Supply Operation if Required
- Wide Dynamic Range Supports Most Photodiode Current Measurement Applications
- 5 Decades of Dynamic Range (10nA to 1mA)
- Monotonic Over a 1nA to 1mA Range
- Adjustable Output Scale Factor
- 0.25V/Decade Internally Trimmed Output Scale Factor
- Adjustable Output Offset Voltage
- Internal 10nA to 10µA Reference Current Source
- 0.5V Input Common-Mode Voltage
- Small Package and Few External Components Saves Space and Simplifies Design-In
- 16-Pin TQFN Package (4mm x 4mm x0.8mm)
Applications/Uses
- Analog Signal Processing
- Medical Instrumentation
- Photodiode Current Monitoring
- Portable Instrumentation
Description
The MAX4206 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 a 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 MAX4206'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 MAX4206. The output-offset voltage and the adjustable scale factor are also set using external resistors.
The MAX4206 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.
The MAX4206'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 MAX4206. The output-offset voltage and the adjustable scale factor are also set using external resistors.
The MAX4206 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.
Technical Docs
| Data Sheet | Precision Transimpedance Logarithmic Amplifier with Over 5 Decades of Dynamic Range | May 19, 2015 |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
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