A signal applied at the VSET pin of 0.2 V to 2.5 V with respect to COMM is amplified by a fixed gain of 30 to produce the 6 V to 75 V bias at pin VAPD.The accuracy of the ADL5317's bias control interface allows for straightforward calibration to maintain constant avalanche multiplication factor of the photodiode over temperature.The current monitor output, IPDM, maintains its high linearity versus photodiode current over the full range of APD bias voltage.The current ratio of 5:1 remains constant as VSET and VPHV are varied.
The ADL5317ACPZ-REEL7 is built for exceptional performance and low noise design for all APD modules and systems in next generation optical networks.
Feature
- Accurately sets avalanche photodiode bias voltage Wide bias range from 6 V to 75 V set using 3 V compatible control interface
- Monitors photodiode current (5:1 ratio) over 6 decades Linearity 0.5% from 10 nA to 1 mA, 1% from 5 nA to 5 mA
- Over-current protection and over-temperature shutdown
- Allows using a fixed high-voltage switcher, reducing supply decoupling and low-pass filtering requirements, thereby leading to low noise transceiver design
- Miniature 16-lead chip scale package (LFCSP 3mm x 3mm)
(Picture: Pinout)
