Here are a few parts I use on a routine basis... I2C digital pot - 10K shown, comes in other values: AD5259BRMZ10-R7 (DigiKey: AD5259BRMZ10-R7CT-ND $2.85/ea) I2C 16-bit ADC: MCP3425A0T-E/CH (DigiKey: MCP3425A0T-E/CHCT-ND $2.24/ea) I2C Isolator... float an ADC or other I2C parts at 200 VDC? ISO1540 (DigiKey: 296-34871-1-ND $4.80/ea)
Caution on the ISO1540... it is not symmetrical in that the "2" side can handle more capacitive load than the "1" side. Did I mention I don't like manual set trim pots? Is input protection worth $5 in parts? For me, it varies with the cost of the components at risk, complexity to rework or repair, probability of abuse... Most of my boards just have a PTC fuse, ESD and EMC mitigation. Some have current limiting high side switches. Only the controller has the full protection treatment. A fuse and ESD clamp are the bare minimum I'll use. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/486852a1-c70f-4abd-b4d8-f3b63cb4b30d%40googlegroups.com.
