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Home » NEWEST Products » New by Manufacturer » Texas Instruments » LOG114 Precision Logarithmic Amplifier - TI
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Texas Instruments LOG114 Precision Logarithmic Amplifier
Texas Instruments LOG114 Precision Logarithmic Amplifier

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TI LOG114 Precision Logarithmic Amplifier

Texas Instruments LOG114 Precision Logarithmic Amplifier is designed for measuring low-level and wide dynamic range currents in communications, lasers, medical, and industrial systems. TI LOG114 Logarithmic Amplifier 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. LOG114EVM is a ready-to-use platform for evaluating the performance of the LOG114 in various configurations.

Features
  • ADVANTAGES:
    • Tiny for High Density Systems
    • Precision on One Supply
    • Fast Over Eight Decades
    • Fully-Tested Function
  • TWO SCALING AMPLIFIERS
  • WIDE INPUT DYNAMIC RANGE: Eight Decades, 100pA to 10mA
  • 2.5V REFERENCE
  • STABILE OVER TEMPERATURE
  • LOW QUIESCENT CURRENT: 10mA
  • DUAL OR SINGLE SUPPLY: ±5V, +5V
  • SPECIFIED TEMPERATURE RANGE: -5°C to +75°C
Applications
  • ONE TERBIUM-DOPED FIBER OPTIC AMPLIFIER (EDFA)
  • LASER OPTICAL DENSITY MEASUREMENT
  • PHOTODIODE SIGNAL COMPRESSION AMP
  • LOG, LOG-RATIO FUNCTION
  • ANALOG SIGNAL COMPRESSION IN FRONT OF ANALOG-TO-DIGITAL (ADC) CONVERTER
  • ABSORBANCE MEASUREMENT
Application Circuit
Application Circuit
  • Texas Instruments