TINA/Spice/MUX36D08: Operating point not found

Fan.Wang

Intellectual 2900 points

Part Number: MUX36D08
Other Parts Discussed in Thread: TINA-TI

Tool/software: TINA-TI or Spice Models

I run the transient analysis with "Calculate operating point".

The error message is "Component: U1.XCAP2.ECDOFFAP".

I attached my TINA schematic

1715.Noname.TSC

over 8 years ago

0 John Miller - Sensing over 8 years ago

TI__Mastermind 40295 points

Fan,

For your application, is it practical to run the sim without finding the initial operating point?
Your circuit seems to run a transient sim successfully if you do this.

Regards,
John

0 Fan.Wang over 8 years ago in reply to John Miller - Sensing

TI__Intellectual 2900 points

Hi John,

I can definitely make this standalone circuit simulatable. What I am looking for is why it reports that it is not able to find DC operating point with all inputs and outputs tied up. I am curious whether it is TINA issue or our device model issue.

0 Sanjay Parelkar over 8 years ago

Prodigy 240 points

Dear Sir,

Attached is the simulation. I am not able to get the required out of 20mA for channel 2. Sine my input is 20mA my output should also be same. Pkease check and confirm.

Thank

sanjay Parelkar 5460.Noname.TSC

0 Nikhil Gupta (Product Folder Models) over 8 years ago in reply to Fan.Wang

TI__Mastermind 39210 points

Fan,

Operating point not found is only a simulation artifact when the simulator is not able to resolve the circuit equations. It does not reflect device behavior.

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TINA/Spice/MUX36D08: Operating point not found