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Part Number: AMC1210
Hi,We have the following system:AMC1204 isolated Delta-Sigma Modulator generates data stream to AMC1210. CLKx is produced by the AMC1210. If we sweep through the whole range of the AMC1204 (-320mV...+320mV) the AMC1204 produces a datastream from permanent low over 50% low/high to permanent high. So far so good.We now have the problem that some of the AMC1210 switches the sign of read-out value when we go close to the low limit of the AMC1204 (-320mV). In this case the AMC1204 produces a permanent low signal.Questions:1. Is it safe to operate the AMC1204 input voltage between -320mV and -500mV (+320mV to +500mV respective)? Does the AMC1204 still produces a permanent low (permanent high respective) signal? (clipping still working)
2. Is there any problem known when the AMC1210 has a permanent low input signal?
Thanks and best regards,Patrick
Alex SmithApplications Engineer | Precision Delta-Sigma Converters
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In reply to Alexander Smith:
Alex,Thank you for your answer. Meanwhile we could identify the problem in a wrong offset calculation on our side.As we are doing a redesign of the board we plan to replace the AMC1204DW with a AMC1306M25DWV. Is this a suitable 1:1 replacement (apart from the footprint)?Any change neeeded on the AMC1210 side or is this a 1:1 replacement?We also plan to change the High-side supply to change from 5V to 3.3V. Any drawback in doing this?Best regards,Patrick
In reply to Pruf:
Glad to hear that the issue was resolved!
This is a suitable 1:1 replacement apart from the footprint like you mentioned.
No issues with the AMC1210 or the power supply.
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