I would like to use the DAC8734 to generate a +- 5V bipolar output signal into a 50Kohm load. I would like to use +- 6VDC supplies for AVDD and AVSS. Will the DAC8734 deliver +-5V into the 50K load with +- 6V power supplies. What is the required power supply headroom for a light circuit load like this?
I plan to use Vref = 2.5V and x4 Gain for a bipolar output swing of +- 5V. AVDD = +6V, AVSS = -6V.
End application is generation of an ECG signal of 1 mVp-p AC magnitude, riding on a DC bias voltage of up to +-400mVDC. Load impedance will be 50 Kohms. I plan to use the DAC to generate output signals of up to +- 5 VDC, and attenuate the output level down to +- 450mVDC with an external 11:1 attenuator.
If the DAC8734 cannot support this output voltage level, what happens if I scale the output to reach this level, and simply allow the DAC output stage to clip the waveform? What maximum output voltage can be generated into the 50K load with +-6V power supplies?
Thanks for your help!