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參數(shù)資料
| 型號(hào)： | DAC729 |
| 英文描述： | DAC729 - DISCONTINUED PRODUCT. No longer recommended for new design. |
| 中文描述： | DAC729 -已停產(chǎn)產(chǎn)品。不再推薦用于新設(shè)計(jì)。 |
| 文件頁(yè)數(shù)： | 7/12頁(yè) |
| 文件大?。?/td> | 251K |
| 代理商： | DAC729 |
DAC729
7
common to shunt noise pickup. This capacitor should be a
low leakage film type (such as Mylar or Teflon).
Refer to Figures 5 and 6 for relationship of offset and gain
adjustments to unipolar and bipolar D/A converters.
OFFSET ADJUSTMENT
For unipolar (CSB) configurations, apply the digital input
code that should produce zero potential output and adjust the
offset potentiometer for zero output.
For bipolar (COB) configurations, apply the digital input
code that should produce the maximum negative output
voltage. See Table II for corresponding codes and Figures 2
and 3 for offset adjustment connections. Offset adjust should
be made prior to gain adjust.
GAIN ADJUSTMENT
For either unipolar or bipolar configurations, apply the
digital input that should give the maximum positive output
voltage. Adjust the gain potentiometer for this positive full-
scale voltage. See Table II for positive full-scale voltages
and Figure 3 for gain adjustment connections.
OUTPUT
RANGE
±
10V
±
5V
±
2.5V
CONNECT CONNECT CONNECT
PIN 23
PIN 31
CODE
PIN 24
16-BITS
18-BITS
COB
COB
COB
to Pin 25
to Pin 27
to Pin 27
to Pin 26
to Pin 26
to Pin 26
to Pin 29
to Pin 29
to Pins
29 & 25
to Pin 29
9.9969V
4.9998V
2.4992V
9.99992V
9.99996V
2.49998V
0 to 10V
CSB
to Pins
25 & 26
to Pins
27 & 28
N/C
9.9998V
9.99996V
0 to 5V
CSB
N/C
to Pin 29
4.9999V
4.99998V
GAIN ADJUST
TABLE II. Output Range Connections and Gain Adjust
Voltage.
Mylar
, Teflon
E.I. du Pont de Nemours & Co.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
+
1μF
+
1μF
+
1μF
–15V
+15V
+5V V
LOGIC
1
Analog
Common
Reference Common
Digital Common
1
18-Bit
DAC
FIGURE 2. Ground Connections and Supply Bypass.
–V
Offset Adjust
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
–V
CC
= 15V
+5V
0.0022μF
270k
+V
CC
= 15V
NOTE: (1) Mylar
or Teflon
Film.
3.9M
–V
CC
Gain Adjust
+V
CC
10k
to
100k
10k
to
100k
+V
CC
(1)
FIGURE 3. Gain and Offset Adjust Hook-Up.
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