Part Number: AMC1200-Q1
Tool/software:
Hello Team,
Customer found the 1pcs device failure return as the differential output voltage is abnormal in production line. and the unit had been analysis with FA( QEM-CCR-2503-00012) before. however the FA result didn't show any damage observed as attached file. And we found the VOUTP is 3.26V, and VOUTN is 1.8V. GAIN Value is 3.26-1.8V/100mV = 14.6V that is already out of SPEC.
There're few questions here.
1. How to do the correct failure analysis to indicate the gain failure?
If input a +/-324mV,peak triangle waveform to the INPUTs to check Gain, is that a good way? How about the slop of triangle setting? is there any best suggestion?
2. How come Gain value would be failure and out of SPEC?
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Test Conditions in product line:
PIN2-3, with 100mV Input
PIN 7, V+ is 3.26V
PIN 6, V- is 1.8V
Vout_diff = 3.26V - 1.8V = 1.4V, Gain is about 14 (NG unit)
[Good Unit]
Vout_diff = 0.9V
Measurement with NG unit (Vout_diff is 1.553V)
Measurement with NG Unit (Vout_diff is 0.944V)
