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APPLICATION INFORMATION

Unipolar Output Operation

DAC

DAC8830

SDI

SCLK

CS

DGND

V

OUT

0.1

µF

V

AGND

Input

Register

DAC Latch

V

DD

V

REF

+5 V

+2.5 V

OPA277

OPA704

OPA727

+

0.1

µF

10

µF

DAC8830-EP

DAC8831-EP

SGLS334C – AUGUST 2006 – REVISED APRIL 2007

These DACs are capable of driving unbuffered loads of 60 k

Ω. Unbuffered operation results in low supply

current (typically 5

μA) and a low offset error. The DAC8830 provides a unipolar output swing ranging from 0 V

show a typical unipolar output voltage circuit for each device, respectively. The code table for this mode of

operation is shown in Table 1.

Table 1. Unipolar Code

DAC Latch Contents

Analog Output

MSB

LSB

1111 1111 1111 1111

1000 0000 0000 0000

0000 0000 0000 0001

0000 0000 0000 0000

0 V

Figure 46. Unipolar Output Mode of DAC8830

19

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