TINA/Spice/LMC6482: Application circuit of LMC6482

Rahul Surawase48

Part Number: LMC6482
Other Parts Discussed in Thread: TINA-TI,

Tool/software: TINA-TI or Spice Models

Hello TI,
I am Using LM6482 for Doppler sensor, I am little confuse about there circuit please some one explain the circuit thanks for your valuable response

why there is using Divider of R1&R2 on input side of the LMC6482 non inverting terminal ...?

Output of IF is 10mV to 100mV floating when the motion is detected

Output of IF is going through Divider to LMC6482 Non inverting terminal ....?

Thanks and Regards,
Rahul suarawase

over 5 years ago

0 kai klaas69 over 5 years ago

Guru 140200 points

Hi Rahul,

as you power the LMC6482 with a single supply voltage and your input signal is AC, you will need to create a pseudo signal ground at midsupply. C2 in combination with the not shown load resistance removes this bias voltage again.

Kai

0 Rahul Surawase48 over 5 years ago in reply to kai klaas69

Expert 2395 points

Hello Kai,
C2 in combination with the not shown load resistance removes this bias voltage again. i am not getting you, there is any issues in the circuit, if yes..what is the correct solution ..?

thanks,
Rahul

0 kai klaas69 over 5 years ago in reply to Rahul Surawase48

Guru 140200 points

Hi Rahul,

circuit looks good, but has a very high gain:

rahul2.TSC

Gain seems too high for your 10mV...100mV input signal. So, I would decrease the gain.

Kai

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TINA/Spice/LMC6482: Application circuit of LMC6482