Thanks Kris: I've built my own pcb. Below you can see part of the schematic. AC signal comes from a band pass filter. In J41 I can place a configuration jumper that conects pin 5 to a LM319 output that drives this line to GND when the comparator changes its output in that sense. Jp4 and TP13 are used for fine trimming as described in the datasheet. In adition, I've placed P25 for scale factor trimming, and implemented a 2 order filter with internal buffer for ripple smoothing. Circuit accuracy is pretty good. As stated before, when disabled, voltage in pin 16 is -7,5V and changing R150 value changes this voltage. Also, I've measured +68mV in pin 11. This voltage can be driven to 0V placing any resistor between pin 11 and gnd. I expected that driving RMSOUT to 0V, would drive BUFIN to 0V and then BUFFOUT to 0V too, but I found that BUFFOUT is forced to -VS when chip is disabled.
Apparently there is no way to solve this. internal buffer should not be used if CS pin is not tied to +VS.
Hope this helps. Thanks in advance.
ED.
