DAC729JH BURR-BROWN [Burr-Brown Corporation], DAC729JH Datasheet - Page 7

• Manufacturer Part Number: DAC729JH
• Description: Ultra-High Resolution 18-BIT DIGITAL-TO-ANALOG CONVERTER
• Manufacturer: BURR-BROWN [Burr-Brown Corporation]

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.
Mylar
FIGURE 2. Ground Connections and Supply Bypass.
+5V V
+
™
, Teflon
LOGIC
1µF
Digital Common
™
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
E.I. du Pont de Nemours & Co.
18-Bit
DAC
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
Reference Common
+
–15V
1µF
+
Common
Analog
+15V
1µF
7
TABLE II. Output Range Connections and 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.
FIGURE 3. Gain and Offset Adjust Hook-Up.
OUTPUT
0 to 10V
RANGE
0 to 5V
+5V
2.5V
10V
5V
NOTE: (1) Mylar
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
CODE
COB
COB
COB
CSB
CSB
Voltage.
CONNECT CONNECT CONNECT
to Pin 25
to Pin 27
to Pin 27
25 & 26
27 & 28
PIN 23
to Pins
to Pins
™
or Teflon
to Pin 26
to Pin 26
to Pin 26
PIN 31
N/C
N/C
™
Film.
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
DAC729
to Pin 29
to Pin 29
to Pin 29
to Pin 29
29 & 25
PIN 24
to Pins
(1)
0.0022µF
270k
+V
–V
3.9M
CC
CC
16-BITS
9.9969V
4.9998V
2.4992V
9.9998V
4.9999V
GAIN ADJUST
= 15V
= 15V
Offset Adjust
Gain Adjust
+V
–V
+V
–V
CC
CC
CC
CC
9.99992V
9.99996V
2.49998V
9.99996V
4.99998V
18-BITS
10k to
10k to
100k
100k