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Part Number: MAX4206
Description: The MAX4206 logarithmic amplifier computes the log ratio of an input current relative to a reference c...
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MAX4206
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DataSheet
General Description
MAX4206 General 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 purposes, 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.
MAX4206 Maximum Ratings
(All voltages referenced to GND, unless otherwise noted.)
VCC.........................................................................-0.3V to +12V
VEE............................................................................-6V to +0.3V
Supply Voltage (VCC to VEE) ............................................... +12V
REFVOUT......................................................(VEE - 0.3V) to +3.0V
OSADJ, SCALE, REFISET ..............................(VEE - 0.3V) to +5.5V
REFIIN, LOGIIN ........................................(VEE - 0.3V) to VCMVIN
LOGV1, LOGV2, CMVOUT,
REFIOUT ..........................................(VEE - 0.3V) to (VCC + 0.3V)
CMVIN...........................................................(VEE - 0.3V) to +1V
Continuous Current (REFIIN, LOGIIN) ..............................10mA
Continuous Power Dissipation (TA = +70°C)
16-Pin Thin QFN (derate 16.9mW/°C above +70°C) .1349mW
Operating Temperature Range ......................-40°C to +85°C
Junction Temperature ..................................................+150°C
Storage Temperature Range .......................-65°C to +150°C
Lead Temperature (soldering, 10s) .............................+300°C
MAX4206 Features
+2.7V to +11V Single-Supply Operation
±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
0.5V Input Common-Mode Voltage
Small 16-Pin Thin QFN Package (4mm x 4mm x 0.8mm)
-40°C to +85°C Operating Temperature Range
Evaluation Kit Available
±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
0.5V Input Common-Mode Voltage
Small 16-Pin Thin QFN Package (4mm x 4mm x 0.8mm)
-40°C to +85°C Operating Temperature Range
Evaluation Kit Available
MAX4206 Typical Application
Photodiode Current Monitoring
Portable Instrumentation
Medical Instrumentation
Analog Signal Processing
Portable Instrumentation
Medical Instrumentation
Analog Signal Processing
MAX4206 Connection Diagram
MAX4206
PDF/DataSheet Download
- Datasheet: MAX4206
- File Size: 393216 KB
- Manufacturer: MAXIM
- Click here to Download
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