AMC1301: Amplifiers forum

Karthik S1

Part Number: AMC1301

Hello,

Can anyone help me out to calculate the total resistance across HV_POS and HV_NEG and shunt resistance of 488ohms ?

High-voltage measurements are done by populating R1, R2, R3, R4, R5, and R6. The total resistance measured from HV POS to HV NEG is 801 kΩ; this result includes a shunt resistance of 488 Ω. The typical gain stage of the AMC1301-Q1 is 8.1517.

over 6 years ago

0 Alexander Smith over 6 years ago

TI__Guru 55332 points

Hi Karthik,

Thanks for your post and welcome to the forum!

You seem to answer your own question in the post. Can you please clarify the question?

0 Karthik S1 over 6 years ago in reply to Alexander Smith

Prodigy 100 points

Hi Alexander

Yeah sure I'll clarify my question

In the reference design circuit document they clearly mentioned that the total resistance will be 801k ohms and shunt resistance will be 488 ohms but according to my calculations I'm getting total resistance of 789kohms if I take input impedance as 22kohms for amc1301 and shunt resistance of 1kohm.

Can you explain it how?

Regards,

Karthik S

0 Alexander Smith over 6 years ago in reply to Karthik S1

TI__Guru 55332 points

Hi Karthik,

The difference between 789k and 801k is most likely due to resistor tolerances.

0 Karthik S1 over 6 years ago in reply to Alexander Smith

Prodigy 100 points

Hi Alexander,

Thanks a lot!!