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ADL5317

Analog Devices
Part Number ADL5317
Manufacturer Analog Devices
Description Avalanche Photodiode Bias Controller and Wide Range
Published Jan 11, 2007
Detailed Description www.DataSheet4U.com Avalanche Photodiode Bias Controller and Wide Range (5 nA to 5 mA) Current Monitor ADL5317 FEATURES...
Datasheet PDF File ADL5317 PDF File

ADL5317
ADL5317

Overview
www.
DataSheet4U.
com Avalanche Photodiode Bias Controller and Wide Range (5 nA to 5 mA) Current Monitor ADL5317 FEATURES Accurately sets avalanche photodiode (APD) bias voltage Wide bias range from 6 V to 75 V 3 V-compatible control interface Monitors photodiode current (5:1 ratio) over six decades Linearity 0.
25% from 10 nA to 1 mA, 0.
5% from 5 nA to 5 mA Overcurrent protection and overtemperature shutdown Miniature 16-lead chip scale package (LFCSP 3 mm × 3 mm) FUNCTIONAL BLOCK DIAGRAM 16 15 14 13 COMM FALT 1 COMM COMM COMM ADL5317 OVERCURRENT PROTECTION THERMAL PROTECTION CURRENT MIRROR 5:1 NC 12 APPLICATIONS Optical power monitoring and biasing in APD systems Wide dynamic range voltage sourcing and current monitoring in high voltage systems VSET 2 30 × VSET IPDM 11 29 × R IAPD 5 3 VPLV VPHV VPHV 5 R IAPD VCLH 6 NC 10 4 GARD 7 VAPD 8 GARD 9 Figure 1.
GENERAL DESCRIPTION The ADL5317 is a high voltage, wide dynamic range, biasing and current monitoring device optimized for use with avalanche photodiodes.
When used with a stable high voltage supply (up to 80 V), the bias voltage at the VAPD pin can be varied from 6 V to 75 V using the 3 V-compatible VSET pin.
The current sourced from the VAPD pin over a range of 5 nA to 5 mA is accurately mirrored with an attenuation of 5 and sourced from the IPDM monitor output.
In a typical application, the monitor output drives a current input logarithmic amplifier to produce an output representing the optical power incident upon the photodiode.
The photodiode anode can be connected to a high speed transimpedance amplifier for the extraction of the data stream.
A signal of 0.
2 V to 2.
5 V with respect to ground applied at the VSET pin is amplified by a fixed gain of 30 to produce the 6 V to 75 V bias at Pin VAPD.
The accuracy of the bias control interface of the ADL5317 allows for straightforward calibration, thereby maintaining a constant avalanche multiplication factor of the photodiode over temperature.
T...


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