AMC1200: AMC1200BDWVR

MAHESH ULISI

Prodigy 50 points

Part Number: AMC1200

Hi,

I'm facing issue related to noise and voltage hunting at AMC1200 and OP-AMP output.

Please check the schematic if any thing is wrongly connected.

R20-2Mohm,R22-2Mohm and R24-1Kohm

C20-10nF,C22-0.1uF,C24-0.1uF

R342,R346-3K3,R347,R343-5K6,C229-1nF

over 1 year ago

0 Alexander Smith over 1 year ago

TI__Mastermind 48791 points

Hello Mahesh,

The negative output of the AMC1200 should not be directly connected to ground as connected. The outputs are driven and when connected in this way, damage to the device may occur.

I recommend taking a look at the differential to single-ended conversion in this document for an example: https://www.ti.com/lit/an/sbaa347/sbaa347.pdf

0 MAHESH ULISI over 1 year ago in reply to Alexander Smith

Prodigy 50 points

Hello Alexander,

Okay I understand. Is there any chance, voltage will be unstable/hunting on secondary side with this type of configuration.

0 kai klaas69 over 1 year ago in reply to MAHESH ULISI

Guru 140200 points

Hi Mahesh,

yes, of course, because you short circuit one output of the AMC1200 !!!!!!! A differential amplifier has to be connected to the output, or an ADC with differential inputs.

Kai

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AMC1200: AMC1200BDWVR