Microsoft Excel spreadsheet calculator referenced in application report SLAA39

Jeffrey Rodenkirch

Could you please send me or post a copy of the Microsoft Excel spreadsheet calculator that is referenced in application report SLAA399 - November 2008? See the first paragraph in section 4.1.1.

http://focus.ti.com/lit/an/slaa399/slaa399.pdf

over 15 years ago

0 Hamza Fraz over 15 years ago

TI__Expert 5820 points

Please find attached.

Regards

DAC_3p3V_passive_interface_calculator_external.xls

0 Jeffrey Rodenkirch over 15 years ago in reply to Hamza Fraz

Prodigy 60 points

Thanks for the spreadsheet. Could you please provide a version that does not have the spreadsheet "protected?" I would like to see the formulas because my application is slightly different. I am going into an amplifier that has an input impedance of 200 ohms and I have already designed my LPF assuming 50 ohms differential.

0 Hamza Fraz over 15 years ago in reply to Jeffrey Rodenkirch

TI__Expert 5820 points

Jeffrey

Assuming you are using current sink DAC, the excel sheet to facilitate calculation of resistor values is attached. Please note that TI does not guarantee the accuracy of this calculator and you should verify all values with a simulator tool such as TINA. Also refer to the following EVM which illustrates some designs with DAC & amplifiers.

http://focus.ti.com/docs/toolsw/folders/print/tsw3070evm.html

Regards,

DAC_3p3V_passive_interface_calculator_KC_internal.xls

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Microsoft Excel spreadsheet calculator referenced in application report SLAA39