Logarithmic Amplifiers

A Iogarithmic amplifier is a type of amplifier- an electronic device that increases the amount of electrical signals. It converts an input current into an output voltage (a flow of electrical current). Typically, the source of this current is a photodiode.

Why are logarithmic amplifiers used?

Logarithmic amplifiers are not only used to create voltage, they're also used to regulate gain (the ratio of two quantities). In the case of a logarithmic amplifier, this is the measurement of the output of a circuit or component in relation to its input.

By using a logarithmic amplifier you can also compress the range of signals in an electronic system because they provide an effective means of dealing with wide dynamic range signals. For example, a system with wide dynamic range may have poor signal-to-noise.

Where are logarithmic amplifiers used?

Logarithmic amplifiers are commonly used in high-speed electronic circuits. Because of their ability to compress signals, they remain a key component in many video, fibre, medical (blood analysis equipment), scientific (material analysers) and wireless systems.


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Description Price Power Supply Type Typical Single Supply Voltage Typical Dual Supply Voltage Maximum Input Offset Voltage Maximum Input Resistance Rail to Rail Output Type Mounting Type Package Type Pin Count Dimensions Height Length Maximum Operating Temperature
RS Stock No. 165-9523
Mfr. Part No.MAX2015EUA+
BrandMaxim
PHP565.43
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Single 2.7 → 5.25 V - - 0.02MΩ - Single Ended Surface Mount μMAX 8 3.05 x 3.05 x 0.95mm 0.95mm 3.05mm +85 °C
RS Stock No. 461-8302
Mfr. Part No.LOG104AID
PHP779.61
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Dual - ±12 V, ±15 V, ±5 V, ±9 V 1.5mV - - - Surface Mount SOIC 8 4.9 x 3.91 x 1.58mm 1.58mm 4.9mm +85 °C
RS Stock No. 799-2805
Mfr. Part No.MAX2015EUA+
BrandMaxim
PHP678.50
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Single 2.7 → 5.25 V - - 0.02MΩ - Single Ended Surface Mount μMAX 8 3.05 x 3.05 x 0.95mm 0.95mm 3.05mm +85 °C
RS Stock No. 100-3852
Mfr. Part No.LOG104AID
PHP686.985
Each (In a Tube of 75)
units
Dual - ±12 V, ±15 V, ±5 V, ±9 V 1.5mV - - - Surface Mount SOIC 8 4.9 x 3.91 x 1.58mm 1.58mm 4.9mm +85 °C
RS Stock No. 523-7847
Mfr. Part No.AD8307ARZ
PHP646.02
Each
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Single 3 V, 5 V - 0.5mV 0.001MΩ Rail to Rail Output Rail to Rail Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm +85 °C
RS Stock No. 912-8882
Mfr. Part No.AD8304ARUZ
PHP1,047.392
Each (In a Tube of 96)
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Single 5 V - 20mV 35MΩ Rail to Rail Output Rail to Rail Surface Mount TSSOP 14 5 x 4.4 x 1mm 1mm 5mm +85 °C
RS Stock No. 100-3853
Mfr. Part No.LOG112AID
PHP780.887
Each (In a Tube of 50)
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Dual - ±12 V, ±15 V, ±5 V, ±9 V 1mV - - - Surface Mount SOIC 14 8.65 x 3.91 x 1.58mm 1.58mm 8.65mm +85 °C
New
RS Stock No. 190-4319
Mfr. Part No.MAX4206ETE+
BrandMaxim
PHP288.333
Each (In a Tube of 75)
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Dual, Single 2.7 → 11 V ±2.7 to ±5.5V 5mV - - - Surface Mount TQFN 16 4.1 x 4.1 x 0.75mm 0.75mm 4.1mm +85 °C
RS Stock No. 523-7853
Mfr. Part No.AD8313ARMZ
PHP1,086.51
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Single 3 V, 5 V - - 0.001MΩ Rail to Rail Output Rail to Rail Surface Mount MSOP 8 3 x 3 x 0.85mm 0.85mm 3mm +85 °C
RS Stock No. 108-303
Mfr. Part No.AD8364ACPZ-R2
PHP608.18
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Single 5 V - - 0.001MΩ - - Surface Mount LFCSP VQ 16 4 x 4 x 0.83mm 0.83mm 4mm +85 °C
New
RS Stock No. 190-6350
Mfr. Part No.MAX4206ETE+
BrandMaxim
PHP333.00
Each (In a Pack of 2)
units
Dual, Single 2.7 → 11 V ±2.7 to ±5.5V 5mV - - - Surface Mount TQFN 16 4.1 x 4.1 x 0.75mm 0.75mm 4.1mm +85 °C
RS Stock No. 912-7476
Mfr. Part No.AD8310ARMZ
PHP376.692
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Single 3 V, 5 V - 1.5mV 0.001MΩ Rail to Rail Input - Surface Mount MSOP 8 3 x 3 x 0.85mm 0.85mm 3mm +85 °C
RS Stock No. 912-7472
Mfr. Part No.AD8313ARMZ
PHP892.516
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Single 3 V, 5 V - - 0.001MΩ Rail to Rail Output Rail to Rail Surface Mount MSOP 8 3 x 3 x 0.85mm 0.85mm 3mm +85 °C
RS Stock No. 111-1182
Mfr. Part No.AD8307ARZ
PHP514.296
Each (In a Tube of 98)
units
Single 3 V, 5 V - 0.5mV 0.001MΩ Rail to Rail Output Rail to Rail Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm +85 °C
RS Stock No. 709-6049
Mfr. Part No.AD606JNZ
PHP2,564.67
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Single 5 V - - 0.003MΩ - Differential Through Hole PDIP 16 20.07 x 6.35 x 3.3mm 3.3mm 20.07mm +70 °C
RS Stock No. 523-8137
Mfr. Part No.AD8310ARMZ
PHP481.01
Each
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Single 3 V, 5 V - 1.5mV 0.001MΩ Rail to Rail Input - Surface Mount MSOP 8 3 x 3 x 0.85mm 0.85mm 3mm +85 °C
RS Stock No. 121-9042
Mfr. Part No.LOG101AID
PHP680.095
Each (In a Tube of 75)
units
Dual - ±12 V, ±15 V, ±5 V, ±9 V 1.5mV - - - Surface Mount SOIC 8 4.9 x 3.91 x 1.58mm 1.58mm 4.9mm +75 °C
RS Stock No. 709-5389
Mfr. Part No.AD8307ANZ
PHP646.02
Each
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Single 3 V, 5 V - 0.5mV 0.001MΩ Rail to Rail Output Rail to Rail Through Hole PDIP 8 9.27 x 7.24 x 3.43mm 3.43mm 9.27mm +85 °C
RS Stock No. 160-9966
Mfr. Part No.AD8364ACPZ-R2
PHP534.32
Each (On a Reel of 250)
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Single 5 V - - 0.001MΩ - - Surface Mount LFCSP VQ 16 4 x 4 x 0.83mm 0.83mm 4mm +85 °C
RS Stock No. 497-1316
Mfr. Part No.AD8304ARUZ
PHP1,195.43
Each
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Single 5 V - 20mV 35MΩ Rail to Rail Output Rail to Rail Surface Mount TSSOP 14 5 x 4.4 x 1mm 1mm 5mm +85 °C
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