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0.1

µF

V

DD

+5 V

RFB

INV

AGNDF

AGNDS

DAC

DAC Latch

Input

Register

DAC8831

+V

−V

SDI

SCLK

LDAC

V

OUT

R

FB

R

INV

V

V

CS

+2.5 V

+

0.1

µF

10

µF

DGND

V

OPA277

OPA704

OPA727

V

D

V

DAC8830-EP

DAC8831-EP

SGLS334C – AUGUST 2006 – REVISED APRIL 2007

Figure 47. Unipolar Output Mode of DAC8831

Assuming a perfect reference, the worst-case output voltage may be calculated from the following equation:

Unipolar Mode Worst-Case Output

Where:

D = Code loaded to DAC

INL = Integral nonlinearity in volts

20

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