Datasheet

14
®
DAC7641
FIGURE 6. Single-Supply Buffered Reference with a Reference Low of 50mV.
1000pF
2200pF
OPA2350
100Ω
1000pF
NOTE: V
REFL
has been chosen to be 50mV to allow for current sinking voltage
drops across the 100Ω resistor and the output stage of the buffer op amp.
2200pF
98kΩ
0.05V
2kΩ
+2.5V
100Ω
+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
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
(+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
(+25°C)
0000
H
2000
H
4000
H
6000
H
8000
H
Digital Input Code
A000
H
C000
H
E000
H
FFFF
H
FIGURE 7. Integral Linearity and Differential Linearity
Error Curves for Figure 6.
FIGURE 8. Integral Linearity and Differential Linearity
Error Curves for Figure 9.