During the compensation process, can I connect the +5V of the power supply directly to the VDD of the signal conditioner?
A. No. The signal conditioner’s VDD must be connected through the KEY so that power to the signal conditioner can be controlled by software. This connection is required for synchronization and to speed up the compensation process by avoiding the nine seconds wait time for every voltage read through a DMM. • Q. I see a very low-frequency noise, 2Hz to 3Hz for example, on the output. What causes this? A. The low-frequency noise could be associated with the ODAC and/or OTCDAC outputs. Sigma-delta DACs use pseudorandom sequencing of capacitor charge “dumps” to keep the DAC output at the desired voltage level. Sometimes the DAC sequencing can fall into a pattern. A very long sequencing pattern could repeat and produce output “tones” which can show up on a spectrum analyzer as very low frequencies. Since ODAC and OTCDAC sum directly into the output OUT, these tones could appear on the output. A quick test would be to set up the signal conditioner and monitor the output to see the low-frequen
Related Questions
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- During the compensation process, can I connect the +5V of the power supply directly to the VDD of the signal conditioner?
