Category: Software
Product Number: LT1010
Software Version: 26.0.0
There seems to be a model-internal connection to external node 0 in the LT1010 model. Bias current through the bias pin does not return through e.g. V- as it is supposed to.
How to repeat:
- open the example circuit of LT1010
- add a resistor of 50 Ohms between U1 and V+ (as per the 'typical application' figure on page 1 of the datasheet)
- run the transient simulation and add up all port currents, i.e. 'Ix(U1:V+)+Ix(U1:Bias)+Ix(U1:V-)+Ix(U1:In)+Ix(U1:OUT)'.
- the result hovers around 15.87 mA, it should be zero instead.
This error will be partly hidden when not using the bias pin, e.g. let it float as in the original example. The 'error current' in the sum described above is on the order of 95 uA.
A possible workround to at least balance the currents in the supply voltage sources v1, v2 is adding a sense voltage source of 0V between R1 and +V, and a current controlled current source between ground and the V- pin of the amplifier. But this is a kludge and error prone.
Can this be fixed within the model, please?
