Precision High-Speed Logarithmic Amplifier With 2.5V Reference And Uncommitted Output Op Amps

The LOG114 is specifically designed for measuring low-level and wide dynamic range currents in Communications lasers, medical, and industrial systems. The device computes the logarithm or log-ratio of an input current or voltage relative to a reference current or voltage (logarithmic transimpedance amplifier). High precision is ensured over a wide dynamic range of input signals on either bipolar (5V) or single (+5V) supply. Special temperature drift compensation circuitry is included on-chip. In log-ratio applications, the signal current may be from a high impedance source such as a Photodiode or resistor in series with a low impedance voltage source. The reference current is provided by a resistor in series with a precision internal Voltage Reference photo Diode or active current source. The output signal at VLOGOUT has a scale factor of 0.375V out per decade of input current, which limits the output so that it fits within a 5V or 10V range. The output CAN be scaled and offset with one of the available additional Amplifiers so it matches a wide variety of ADC input ranges. Stable dc performance allows accurate measurement of low-level signals over a wide temperature range. The LOG114 is specified over a -5C to +75C temperature range and CAN operate from -40C to +85C. By Texas Instruments
Part Manufacturer Description Datasheet Samples
LOG114AIRGVR Texas Instruments Precision High-Speed Logarithmic Amplifier with 2.5V Reference and Uncommitted Output Op Amps 16-VQFN 0 to 70
LOG114AIRGVRG4 Texas Instruments Precision High-Speed Logarithmic Amplifier with 2.5V Reference and Uncommitted Output Op Amps 16-VQFN 0 to 70
LOG114AIRGVT Texas Instruments Precision High-Speed Logarithmic Amplifier with 2.5V Reference and Uncommitted Output Op Amps 16-VQFN 0 to 70
LOG114AIRGVTG4 Texas Instruments Precision High-Speed Logarithmic Amplifier with 2.5V Reference and Uncommitted Output Op Amps 16-VQFN 0 to 70
LOG114 's PackagesLOG114 's pdf datasheet
LOG114AIRGVR QFN
LOG114AIRGVRG4 QFN
LOG114AIRGVT QFN
LOG114AIRGVTG4 QFN




LOG114 Pinout, Pinouts
LOG114 pinout,Pin out
This is one package pinout of LOG114,If you need more pinouts please download LOG114's pdf datasheet.

LOG114 Application circuits
LOG114 circuits
This is one application circuit of LOG114,If you need more circuits,please download LOG114's pdf datasheet.


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