DAC7634
www.ti.com
SBAS134A–JULY 2004–REVISED AUGUST 2004
48
47
46
45
44
43
42
41
40
39
VOUTA Sense
VOUT
VOUT
A
AGND
VSS
DAC7634
+V
+V
VREFLAB Sense
VREFLAB
OPA2350
+2.5V
100Ω
VREFH AB
1000pF
2200pF
VREFH AB Sense
VOUTB Sense
VOUT
VOUT
B
Figure 57. Single-Supply Buffered VREFH (1/2 DAC7634)
2.0
1.5
2.0
1.5
1.0
1.0
0.5
0.5
0
0
–0.5
–1.0
–1.5
–2.0
–0.5
–1.0
–1.5
–2.0
2.0
1.5
2.0
1.5
1.0
1.0
0.5
0.5
0
0
–0.5
–1.0
–1.5
–2.0
–0.5
–1.0
–1.5
–2.0
0000H 2000H 4000H 6000H 8000H A000H C000H E000H FFFFH
0000H 2000H 4000H 6000H 8000H A000H C000H E000H FFFFH
Digital Input Code
Digital Input Code
Figure 58. Linearity and Differential Linearity
Error Curves for Figure 57
Figure 59. Linearity and Differential Linearity
Error Curves for Figure 60
48
47
46
45
44
43
42
41
40
39
VOUTA Sense
VOUT
VOUT
A
AGND
VSS
DAC7634
VREFLAB Sense
VREFLAB
+V
+2.5V
VREFH AB
VREFH AB Sense
VOUTB Sense
VOUT
VOUT
B
Figure 60. Low Cost Single-Supply Configuration
21
BB [ BURR-BROWN CORPORATION ]
