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AD8130 Spice Model

Hi All

I would appreciate it if someone can help me with the following LTspice error.

SPICE ERROR LOG:

Error on line 3 : u1 v1 0 v2 fb vcc vee fb ad8130
	 Unable to find definition of model "fb"
	
	*  Unknown parameter "vcc"
Fatal Error: URC instance U1: Length must be positive definite.

I'm trying to simulate the summing circuit application that is shown in the AD8129/AD8130 Datasheet on page 35. 

I have checked that my LTspice model pin list is in the same order as the "AD8130.cir" SUBCKT list.

SPICE NETLIST:

R1 0 FB 1K tol=1 pwr=0.1
U1 V1 0 V2 FB VCC VEE FB AD8130
V1 V1 0 SINE(0 1 1K)
V2 V2 0 SINE(0 1 1K)
V3 VCC 0 12
V4 VEE 0 -12
.lib ad8130.cir
.tran 1m
.backanno
.end

I'm not sure if there is an error with the circuit or with my model. See the attached design files below.

0068.ad8130.zip

Thank you



Updated file attached: Removed LOG.
[edited by: Lukkewaan at 9:42 PM (GMT 0) on 19 May 2020]
Parents Reply
  • Hi ,

    Thank you. I completely overlooked this. I thought it was just the prefix for the part.

    I have always subconsciously used X, not sure why I deferred from normal.

    Extract from LTspice Help

    The symbol's attributes can be overridden in the instance of the symbol 
    as a component in a schematic. For example, if you have a symbol for a 
    MOSFET with a prefix attribute of 'M', 
    it's possible to override the prefix to an 'X' on an 
    instance-by-instance basis so that the transistor can be modeled as 
    subcircuit instead.

    This article from Analog Devices also helped. Good to go back to basics - LTspice: Using an Intrinsic Symbol for a Third-Party Model

    Thanks again.

    Keep well.

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