Hello,
A customer of mine has discovered that the ADS8862 enters a latchup condition after a brownout occurs on the AVDD rail. The problem is reproducible on more than one unit.
Steps to reproduce latchup:
1. DVDD = 1.8V
2. AVDD = 3.3V
3. After powerup, reduce AVDD below 2V and then bring back into nominal operating condition.
The picture above details the voltage waveform that recreates the latchup. The blue trace does not latchup, while the green trace does.
Symptoms of the latchup condition include:
1. Increased current draw from AVDD
2. SPI bus becomes unresponsive.
Would you please verify/confirm this behavior on an EVM? Thanks.
Don