High-Side Monitor From Analog Devices Precisely Mirrors Input Current Over The Widest Range For Optical Designs
Analog Devices » ADL5315
ADL5315 has a mirror ratio of 1:1 over six decades, enabling very accurate current monitoring at very low current levels
About the ADL5315
Analog Devices is introducing a high-side monitor that provides a compact solution for the common and often challenging problem of interfacing an optical power monitoring device, such as a logarithmic amplifier, to the cathode-side of a PIN photodiode. The ADL5315 mirrors the current at the cathode at a 1:1 ratio over a six-decade range, producing an output equal to the reference current monitored. Competing optical current monitors have much higher mirror ratios over narrower ranges, rendering proportional outputs at very low input currents impossible, while discrete solutions are more complex to implement and may require significantly more board space.
The ADL5315 offers unmatched accuracy, with linearity of only 1% over a wide operating range of six decadesâ€"from 3 nA to 3 mA. In PIN photodiode modules where only the cathode is available for connection, the high linearity allows the device to be paired with linear or logarithmic amplifiers to form a complete, precise optical power measurement system. While the ADL5315 is optimized for use with PIN photodiodes, its operating range makes it suitable for a broad array of applications that require accurate current mirroring.
Adjustable Input Current, Small Package
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