The LOG114 is a precision logarithmic amplifier designed for converting analog current signals into logarithmic voltage outputs. Manufactured by Burr-Brown (now Texas Instruments), this device provides a wide dynamic range and excellent accuracy, making it suitable for various industrial and scientific applications.

Applications:

• Optical power measurement
• Gas chromatography
• Mass spectrometry
• pH measurement
• Turbidity measurement
• Process control systems

Features:

• Wide dynamic range: Typically 6 decades
• High accuracy: Typically 0.2% nonlinearity
• Low input bias current: Typically 10 pA
• Temperature compensated
• Single-supply operation
• Adjustable scaling

Benefits:

• Extended measurement range: The wide dynamic range allows for accurate measurement of signals spanning several orders of magnitude.
• High precision: The low nonlinearity ensures accurate conversion of current signals to logarithmic voltage outputs.
• Reduced error: The low input bias current minimizes errors due to source impedance.
• Stable performance: Temperature compensation ensures stable operation over a wide temperature range.
• Simplified power supply requirements: Single-supply operation simplifies power supply design.

The LOG114's logarithmic transfer function compresses a wide range of input currents into a manageable voltage range, facilitating signal processing and analysis. Its high accuracy and stability make it suitable for demanding measurement applications. The device is commonly used in systems where the signal amplitude varies significantly, such as in optical power measurement and gas chromatography. The LOG114 offers a reliable and cost-effective solution for logarithmic amplification needs.