20

®

DAC7744

FIGURE 9. Single-Supply Buffered Reference with a Reference Low of 50mV and Reference High of +5V.

FIGURE 10. Integral Linearity and Differential Linearity Error Curves for Figure 9.

2.0

1.5

1.0

0.5

0

–0.5

–1.0

–1.5

–2.0

1.0

0.5

0

–0.5

–1.0

LINEARITY ERROR AND

DIFFERENTIAL LINEARITY ERROR vs CODE

(DAC A, +25

°C)

0000

H

2000

H

4000

H

6000

H

8000

H

Digital Input Code

A000

H C000H

E000

H FFFFH

2.0

1.5

1.0

0.5

0

–0.5

–1.0

–1.5

–2.0

1.0

0.5

0

–0.5

–1.0

LINEARITY ERROR AND

DIFFERENTIAL LINEARITY ERROR vs CODE

(DAC B, +25

°C)

0000

H

2000

H

4000

H

6000

H

8000

H

Digital Input Code

A000

H C000H

E000

H FFFFH

2.0

1.5

1.0

0.5

0

–0.5

–1.0

–1.5

–2.0

1.0

0.5

0

–0.5

–1.0

LINEARITY ERROR AND

DIFFERENTIAL LINEARITY ERROR vs CODE

(DAC C, +25

°C)

0000

H

2000

H

4000

H

6000

H

8000

H

Digital Input Code

A000

H C000H

E000

H FFFFH

2.0

1.5

1.0

0.5

0

–0.5

–1.0

–1.5

–2.0

1.0

0.5

0

–0.5

–1.0

LINEARITY ERROR AND

DIFFERENTIAL LINEARITY ERROR vs CODE

(DAC D, +25

°C)

0000

H

2000

H

4000

H

6000

H

8000

H

Digital Input Code

A000

H C000H

E000

H FFFFH

NC

NC

NC

NC

V

OUTA Sense

V

OUTA

V

REFL AB Sense

V

REFL AB

V

REFH AB

V

REFH AB Sense

V

OUTB Sense

V

OUTB

48

47

46

45

44

43

42

41

40

39

38

37

DAC7744

V

OUT

V

OUT

99k

Ω

0.05V

1k

Ω

+5V

+V

1000pF

2200pF

+V

OPA350

OPA227

100

Ω

1000pF

2200pF

100

Ω