AMC1303M2510: Placement of Rin (Single-ended input resistance)

Shotaro Sakai

Intellectual 2550 points

Part Number: AMC1303M2510

Hello team,

Can you show me the placement of Rin? My customer is calculating gain error.

Best regards,

Shotaro

over 2 years ago

0 Tom Hendrick over 2 years ago

TI__Guru**** 171216 points

Hi Shotaro,

Rin would be as shown in Figure 55, essentially parallel to R3. The gain error is calculated using equation 5 (page 30) in this configuration. Are you using the AMC1303M2510 for a voltage or current monitoring application?

0 Shotaro Sakai over 2 years ago in reply to Tom Hendrick

TI__Intellectual 2550 points

Hi Tom-san,

Thank you for supporting.

Is the placement of Rin corresponding to the below figure?

Also in my understanding, AMC1303M2510 is used for voltage monitoring. I am checking again with the customer.

Best regards,

Shotaro

+1 Tom Hendrick over 2 years ago in reply to Shotaro Sakai

TI__Guru**** 171216 points

Hi Shotaro,

Yes, but now you have it twice, Figure 55 represents Rin, there is no need to add it a second time.

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AMC1303M2510: Placement of Rin (Single-ended input resistance)