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Logarithmic potentiometer

A logarithmic taper potentiometer has a resistive element that either 'tapers' in from one end to the other, or is made from a material whose resistivity varies from one end to the other. This results in a device where output voltage is a logarithmic function of the slider position.
Most (cheaper) "log" potentiometers are not accurately logarithmic, but use two regions of different resistance (but constant resistivity) to approximate a logarithmic law. The two resistive tracks overlap at approximately 50% of the potentiometer rotation, this gives a stepwise logarithmic taper.[3] A logarithmic potentiometer can also be simulated (not very accurately) with a linear one and an external resistor. True logarithmic potentiometers are significantly more expensive.
Logarithmic taper potentiometers are often used in connection with audio amplifiers as human perception of audio volume is logarithmic.

Logarithmic potentiometer Part List

AD7111
LC2MOS LOGDAC Logarithmic Converter
Analog Devices
AD7111A
LC2MOS LOGDAC Logarithmic Converter
Analog Devices
AD7111ABN
LC2MOS LOGDAC Logarithmic Converter
Analog Devices
AD7111ABR
LC2MOS LOGDAC Logarithmic Converter
Analog Devices
AD7111ACN
LC2MOS LOGDAC Logarithmic Converter
Analog Devices
AD7111ACR
LC2MOS LOGDAC Logarithmic Converter
Analog Devices
AD7111BQ
LC2MOS LOGDAC Logarithmic Converter
Analog Devices
AD7111CQ
LC2MOS LOGDAC Logarithmic Converter
Analog Devices
AD7111KN
LC2MOS LOGDAC Logarithmic Converter
Analog Devices
AD7111LN
LC2MOS LOGDAC Logarithmic Converter
Analog Devices
AD7112
LC2MOS LOGDAC Dual Logarithmic Converter
Analog Devices
AD7112BN
LC2MOS LOGDAC Dual Logarithmic Converter
Analog Devices
AD7112BR
LC2MOS LOGDAC Dual Logarithmic Converter
Analog Devices
AD7112CN
LC2MOS LOGDAC Dual Logarithmic Converter
Analog Devices
AD7112CR
LC2MOS LOGDAC Dual Logarithmic Converter
Analog Devices
AD7118
LOGDAC CMOS Logarithmic Converter
Analog Devices
AD7118BQ
LOGDAC CMOS Logarithmic Converter
Analog Devices
AD7118CQ
LOGDAC CMOS Logarithmic Converter
Analog Devices
AD7118KN
LOGDAC CMOS Logarithmic Converter
Analog Devices
AD7118LN
LOGDAC CMOS Logarithmic Converter
Analog Devices
AD7118TQ2
LOGDAC CMOS Logarithmic Converter
Analog Devices
AD7118UQ2
LOGDAC CMOS Logarithmic Converter
Analog Devices
ML2009CP
Compatible Logarithmic Gain/Attenuator
Micro Linear Corporation
ML2009CQ
Compatible Logarithmic Gain/Attenuator
Micro Linear Corporation
ML2009IP
Compatible Logarithmic Gain/Attenuator
Micro Linear Corporation
ML2009IQ
Compatible Logarithmic Gain/Attenuator
Micro Linear Corporation
MAX2015
0.1GHz 2.5GHz, 75dB Logarithmic Detector/Controller
Maxim Integrated Products
MAX2015EUA-T
0.1GHz 2.5GHz, 75dB Logarithmic Detector/Controller
Maxim Integrated Products
AD606JCHIPS
Demodulating Logarithmic Amplifier with Limiter Output
Analog Devices
AD606JN
Demodulating Logarithmic Amplifier with Limiter Output
Analog Devices
AD606JR-REEL
Demodulating Logarithmic Amplifier with Limiter Output
Analog Devices
AD606JR-REEL7
Demodulating Logarithmic Amplifier with Limiter Output
Analog Devices
AD640J
DC-Coupled Demodulating Logarithmic Amplifier
Analog Devices
AD640JN
DC-Coupled Demodulating Logarithmic Amplifier
Analog Devices
AD640JP
DC-Coupled Demodulating Logarithmic Amplifier
Analog Devices
AD640JP-REEL
DC-Coupled Demodulating Logarithmic Amplifier
Analog Devices
AD640JP-REEL7
DC-Coupled Demodulating Logarithmic Amplifier
Analog Devices
AD8307
Cost DC-500 Logarithmic Amplifier
Analog Devices
AD8307AN
Cost DC-500 Logarithmic Amplifier
Analog Devices
AD8307AR
Cost DC-500 Logarithmic Amplifier
Analog Devices
AD8307AR-REEL
Cost DC-500 Logarithmic Amplifier
Analog Devices
AD8307AR-REEL7
Cost DC-500 Logarithmic Amplifier
Analog Devices
AD8307-EB
Cost DC-500 Logarithmic Amplifier
Analog Devices
ML2003
Logarithmic Gain/Attenuator
Fairchild Semiconductor
ML2003CP
Logarithmic Gain/Attenuator
Micro Linear Corporation
ML2003CQ
Logarithmic Gain/Attenuator
Micro Linear Corporation
ML2003IP
Logarithmic Gain/Attenuator
Micro Linear Corporation
ML2003IQ
Logarithmic Gain/Attenuator
Micro Linear Corporation
ML2004
Logarithmic Gain/Attenuator
Fairchild Semiconductor
ML2004CP
Logarithmic Gain/Attenuator
Micro Linear Corporation
ML2004IP
Logarithmic Gain/Attenuator
Micro Linear Corporation
LOG100
Precision LOGARITHMIC RATIO AMPLIFIER
Burr-Brown Corporation
LOG100JP
Precision LOGARITHMIC RATIO AMPLIFIER
Burr-Brown Corporation
TDA8780M
True logarithmic amplifier
Philips Semiconductors
MAX4206
Precision Transimpedance Logarithmic Amplifier with Over Decades Dynamic Range
Maxim
AD641
Demodulating Logarithmic Amplifier
Analog Devices
AD641A
Demodulating Logarithmic Amplifier
Analog Devices
AD641AN
Demodulating Logarithmic Amplifier
Analog Devices
AD641AP
Demodulating Logarithmic Amplifier
Analog Devices
AD641-EB
Demodulating Logarithmic Amplifier
Analog Devices
AD641S
Demodulating Logarithmic Amplifier
Analog Devices
MAX5407
32-Tap Audio Logarithmic Taper Digital Potentiometer
Maxim Integrated Products
MAX5407EKA
32-Tap Audio Logarithmic Taper Digital Potentiometer
Maxim Integrated Products
AD8309ARU
MHz.500 Demodulating Logarithmic Amplifier with Limiter Output
Analog Devices
AD8309ARU-REEL
MHz.500 Demodulating Logarithmic Amplifier with Limiter Output
Analog Devices
AD8309ARU-REEL7
MHz.500 Demodulating Logarithmic Amplifier with Limiter Output
Analog Devices
AD640BE
DC-Coupled Demodulating Logarithmic Amplifier
Analog Devices
AD640T
DC-Coupled Demodulating Logarithmic Amplifier
Analog Devices
AD640TCHIPS
DC-Coupled Demodulating Logarithmic Amplifier
Analog Devices
AD640TD
DC-Coupled Demodulating Logarithmic Amplifier
Analog Devices
AD640TE
DC-Coupled Demodulating Logarithmic Amplifier
Analog Devices
AD8313-EVAL
GHz-2.5 Logarithmic Detector/Controller
Analog Devices
AD8306ACHIPS
MHz-400 High Precision Limiting-Logarithmic Amplifier
Analog Devices
AD8306AR-REEL
MHz-400 High Precision Limiting-Logarithmic Amplifier
Analog Devices
AD8306AR-REEL7
MHz-400 High Precision Limiting-Logarithmic Amplifier
Analog Devices
AD640BD
DC-Coupled Demodulating Logarithmic Amplifier
Analog Devices
AD8304
Range Logarithmic Converter
Analog Devices
AD8304ARU
Range Logarithmic Converter
Analog Devices
AD8304ARU-REEL
Range Logarithmic Converter
Analog Devices
AD8304ARU-REEL7
Range Logarithmic Converter
Analog Devices