Datasheet

18
®
DAC7644
2.5
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
2.5
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
LE (LSB)DLE (LSB)
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
C000
H
E000
H
FFFF
H
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
LE (LSB)DLE (LSB)
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
C000
H
E000
H
FFFF
H
+2.5V
+V
+1.25V
+V
NC
NC
NC
NC
V
OUT
A Sense
V
OUT
A
V
REF
L AB Sense
V
REF
L AB
V
REF
H AB
V
REF
H AB Sense
V
OUT
B Sense
V
OUT
B
48
47
46
45
44
43
42
41
40
39
38
37
DAC7644
1000pF
2200pF
+V
OPA2350
100Ω
1000pF
2200pF
100Ω
V
OUT
V
OUT
FIGURE 9. Single-Supply Buffered Reference with V
REF
L = +1.25V and V
REF
H = +2.5V (1/2 DAC7644).
FIGURE 7. Integral Linearity and Differential Linearity
Error Curves for Figure 6.
FIGURE 8. Integral Linearity and Differential Linearity
Error Curves for Figure 9.
FIGURE 10. Single-Supply Buffered V
REF
H (1/2 DAC7644).
NC
NC
NC
NC
V
OUT
A Sense
V
OUT
A
V
REF
L AB Sense
V
REF
L AB
V
REF
H AB
V
REF
H AB Sense
V
OUT
B Sense
V
OUT
B
48
47
46
45
44
43
42
41
40
39
38
37
DAC7644
+V
1000pF
100Ω
+2.5V
OPA350
+V
V
OUT
V
OUT
2200pF