The problem turned out to be in how I was powering the chip. My circuit is the following:
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| LTC1859 Circuit |
I'll post the snag I found on the AD5668 16-bit D2A tomorrow.
Thursday, August 9, 2012
Powering an LTC1857/LTC1858/LTC1859
I ran into a problem this week with these little A2D converters. I am using the LTC1859, the 16-bit version. I worked through my Microprocessor setup just fine, all of the MC's signals were transmitting correctly, but the output of the LTC was continually zero (0x8000).
The problem turned out to be in how I was powering the chip. My circuit is the following:
With VDD = +3.3V. Upon closer inspection of the documentation for this guy, it turns out that the DVdd pin must be connected to +5V. A simple correction but an easy to overlook requirement.
I'll post the snag I found on the AD5668 16-bit D2A tomorrow.
The problem turned out to be in how I was powering the chip. My circuit is the following:
I'll post the snag I found on the AD5668 16-bit D2A tomorrow.
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