Datasheet

15
®
DAC7641
1000pF
2200pF
OPA2350
100Ω
1000pF
2200pF
100Ω
+2.5V
+V
+1.25V
+V
V
REFL
V
REFL
Sense
V
REFH
V
REFH
Sense
V
CC
AGND
30 29 28 27 26 25
DAC7641
V
OUT
Sense
V
OUT
V
SS
24
23
22
V
OUT
FIGURE 9. Single-Supply Buffered Reference with V
REF
L = +1.25V and V
REF
H = +2.5V.
FIGURE 10. Single-Supply Buffered V
REF
H.
3.0
2.5
2.0
1.5
1.0
0.5
0
–0.5
–1.0
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
(+25°C)
0000
H
2000
H
4000
H
6000
H
8000
H
Digital Input Code
A000
H
C000
H
E000
H
FFFF
H
FIGURE 11. Linearity and Differential Linearity Error Curves
for Figure 10.
1000pF
100Ω
+2.5V
OPA350
+V
2200pF
V
REFL
V
REFL
Sense
V
REFH
V
REFH
Sense
V
CC
AGND
30 29 28 27 26 25
DAC7641
V
OUT
Sense
V
OUT
V
SS
24
23
22
V
OUT