+15V
2
+10V
6
REF102
+5V
VDD
4
CD
1µF
VREF A
RFB A
C1
10pF
IOUT A
R
DAC A
A1
AGND A
R
R
2
3
±10V
13 Bits
DAC780X
6
RFB B
C2
IOUT B
R
10pF
INA105
DAC B
A2
AGND B
1
VREF B
DAC7802 has a single analog common, AGND.
A1 OPA602 or 1/2 OPA2107.
DGND
FIGURE 8. 13-Bit Bipolar DAC.
Q Adjust
VREF 4
DAC 4
VREF 2
DAC 2
RFB 4
IOUT 2
IOUT 4
AGND 2
AGND 4
fC Adjust
VREF 1
DAC 1
1/2 DAC780X
IOUT 1
AGND 1
Low-Pass
Out
DAC780X
Band-Pass
Out
High-Pass Out
Filter Input
VREF 3
8
7
1
5
13
14
R
R
C
C
IOUT 3
12
DAC 3
AGND 3
1/2 DAC780X
6
Gain Adjust
3
R
R
UAF 42
11
4
2
R = 50kΩ ±0.5%
C = 1000pF ±0.5%
FIGURE 9. Digitally Programmable Universal Active Filter.
DAC7800, 7801, 7802
12
SBAS005A
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