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Original question:

DAC714 Offset adjustment

DAC714: +/-10V Output Voltage Range

Olly
Prodigy 50 points
Part Number: DAC714
Other Parts Discussed in Thread: TINA-TI

Hi,

I was wondering if it would be possible to recommend a circuit, similar to the one shown in Fig. 6B of the datasheet (see reference image below), but for the -10V to 10V output voltage range?

Thanks!

Olly

  • 0
    TI__Guru 53193 points

    Hi Olly,

    The modification for this circuit is simple, just leave the parallel feedback resistor disconnected (RFB2, pin10).  This would make the total feedback resistance 10kohm instead of 5kohm.  I created a TINA-TI simulation to test this.  Note that the current-controlled current source and the voltage controlled current source is just to replicate the MDAC architecture of the DAC itself, which makes DC transfer function in TINA-TI easier.

    Here is the simulation: DAC714 Bipolar Gain and Offset.TSC

    Thanks,

    Paul