README for Texas Instruments Precision DAC SPICE Models

FILE TYPES
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.lib - Encrypted PSPICE model for use with TINA-TI
.tld - Library descriptor file used in conjunction with .lib
.tsc - TINA-TI schematic file already prepared for simulation and contains the DAC SPICE model
.tsm - TINA-TI macro file which can be imported as a device into a TINA-TI schematic

INSTRUCTIONS
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There are three ways to interact with the Precision DAC SPICE models.

1. From the TINA-TI software, go to File->Open and select the .tsc file.  This will provide you with a TINA schematic that already has the DAC SPICE model in it, along with a testbench of other components already populated and connected.  Running the Transient selection from the Analysis menu will produce an output waveform like the graphs pictured on the schematic.  This is the fastest way to get started modeling the DAC.

2. From the TINA-TI software, create a new schematic or open an existing one.  Go to Insert->Macro and browse to the .tsm file for the device you wish to model.  This imports the DAC SPICE model without any extra components attached to it.  You will need to build a schematic around the DAC to test it.

3. In cases where you want to be able to place multiple DACs without importing the macro like in (2) above, you can add the DAC to the TINA-TI SPICE library.  To do this, copy the .lib and .tld files to the SPICELIB folder in the installation directory for TINA-TI.  This directory will be similar to "C:\Program Files\DesignSoft\Tina 9 - TI\SPICELIB".  The next time you restart TINA-TI, you will be alerted that a new library has been added.

PARAMETERS
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The Precision DAC SPICE models have user-definable parameters that will adjust the behavior of the DAC to closely replicate the errors in a real device.  In order to change these parameters, start by double-clicking on the DAC in the schematic.  Click in the SubCkt-Parameters section in the window that pops up.  Then click on the "..." button that appears on the right side.  In the window that appears, you can edit the parameters pertaining to gain and offset errors.  All of the values use standard units, but you can use the modifiers "M" or "U" to denote milli- and micro- values.  An explanation of the parameter postfixes is below:

"_ED" - Error drift of spec in [unit]/degreeC
"_TC" - Temperature coefficient in ppm/degreeC

The parameters match the datasheet specifications. For questions or help with our devices please post your questions at our forum at e2e.ti.com/support/data_converters/precision_data_converters/

Click "OK" twice to get back to the schematic, and your parameters will be updated and reflected on the schematic.