Is it possible to use a 3:1 high impedance voltage divider to measure the high side 1uA-1mA currents for an avalanche photodiode?
This configuration is not good for the AD8479. Large value of resistor in series with the input of the AD8479 will have a large impact to the precision of the part. If you are measuring such very high voltages, you should be looking for an isolated solution for this.
In addition, you may also want to consider the AD7403 on your applications. You can go to Precision ADC community for further assistance in using this product.
Thanks and best regards,
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