INA301: Pspice model produces errors in LTspice

Kurt Blessinger

Part Number: INA301

Hello,

Just want to inform you that when translated to LTspice models two non fatal errors occur.

There are two floating nodes in the SPICE-models of the INA301A1, INA301A2, INA301A3.
Files: sboma60.lib (ina301a1.lib ina301a2.lib ina301a3.lib)

INA301A1, ina301a1.lib
.SUBCKT INA301A1_OPA VIP VIN VDD VSS VO
Node "7" floating

.SUBCKT OUT_CURRENT_CLAMP IN OUT VIMON
Node "OUTx" floating

INA301A2, ina301a2.lib
.SUBCKT INA301A2_OPA VIP VIN VDD VSS VO
Node "7" floating

.SUBCKT OUT_CURRENT_CLAMP IN OUT VIMON
Node "OUTx" floating

INA301A3, ina301a3.lib
.SUBCKT INA301A3_OPA VIP VIN VDD VSS VO
Node "7" floating

.SUBCKT OUT_CURRENT_CLAMP IN OUT VIMON
Node "OUTx" floating

Thank you,

over 5 years ago

0 Ian Williams over 5 years ago

TI__Mastermind 27715 points

Hi Kurt,

Unfortunately TI cannot support LTSpice due to its EULA, which prohibits the competitors of ADI/LT (such as TI) from using LTSpice to promote their products. I have confirmed that the INA301 model works with no issues in both TINA and Cadence PSpice, which are our supported simulators.

However, there a couple general things you can try to resolve this. First, make sure that Gmin stepping is enabled. Gmin stepping adds very small conductances to GND at each node, which can help with floating node errors. You can also try different solver settings. If that doesn't work, you can try adding large resistors from the floating nodes to node '0' (GND) which will force them to have a DC path to GND.

Unfortunately due to the EULA, I'm unable to assist any further with this debug.

Best regards,

Ian Williams
Applications Manager
Current Sensing

0 kai klaas69 over 5 years ago

Guru 140200 points

Hi Kurt,

I would heavily recommend to run the INA301 TINA-TI Reference Design

I see no reason to simulate the INA301 in LTSpice.

Kai

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INA301: Pspice model produces errors in LTspice