User Guide Rev. 0
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Overview

Features and Benefits

  • Full featured evaluation board for the ADL5309 
  • Supports external electrical input or on-board photodiode for optical input
  • On-chip or external photodiode bias
  • ADC control for VOUT1, VOUT2, and digital thermometer

Product Details

The ADL5309-EVALZ evaluation board allows for the evaluation of the ADL5309 logarithmic converter IC.

The ADL5309 is comprised of dual monolithic logarithmic transimpedance amplifiers that are optimized for the measurement of low frequency and wide dynamic range signal power in fiber optic systems. The device produces a highly accurate, temperature compensated output voltage proportional to the logarithm of the ratio between the input current at Pin INP and an internally generated reference current.

The logarithmic slope and intercept are both factory-trimmed to a nominal value of 200 mV/decade and 10 pA, respectively. Both can be adjusted through the I2C interface.

A digital representation of the OUT1 and OUT2 outputs, along with a digital thermometer, is available through the I2C interface. A 14-bit successive approximation register (SAR) analog-to-digital (ADC), controlled through the I2C interface, samples the OUT1 channel output, OUT2 channel output, and the digital thermometer output.

Full specifications on the ADL5309 are available in the ADL5309 data sheet available from Analog Devices, Inc., and must be consulted with this user guide and the ADL5309-EVALZ evaluation board.

Markets and Technologies

Applicable Parts

Getting Started

  • DC power supply (5 V and 100 mA)
  • Two precision source measurement units (for example, Keithley model 236 or Keithley model 238)
  • Two triaxial cables
  • Two triax-to-BNC adapters (triax center to BNC center, triax shield to BNC shield, or triax inner guard may be connected to BNC shield or left floating)
  • Two BNC-to-SMA adapters
  • Two digital multimeters
  • Oscilloscope
  • DC2026C (Linduino One) board (required only for adjusting the internal registers of the ADL5309, and not needed for the evaluation of the ADL5309 in factory default settings)

Documentation & Resources

  • View All (5)
  • Demo Board Schematic (1)
  • User Guide (1)
  • Evaluation Design File (3)
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