DAC702 BURR-BROWN [Burr-Brown Corporation], DAC702 Datasheet - Page 9

• Manufacturer Part Number: DAC702
• Description: Monolithic 16-Bit DIGITAL-TO-ANALOG CONVERTERS
• Manufacturer: BURR-BROWN [Burr-Brown Corporation]

TABLE II. Digital Input and Analog Output Relationships.
If the output cannot be sensed at Common or the system
ground point as mentioned above, the differential output
circuit shown in Figure 8 is recommended. In this circuit the
output voltage is sensed at the load common and not at the
D/A converter common as in the previous circuits. The value
of R
rejection at R
Figure 8 can be reduced to the one shown in Figure 7. Again
the effect of R
FIGURE 7. Preferred External Op Amp Configuration.
1LSB
0000
FFFF
DIGITAL INPUT CODE
DIGITAL INPUT CODE
1LSB
0000
FFFF
To +V
To –V
‡
To V
*
6
DAC702
H
R should be equal to the output impedance at the current output
to compensate for the bias current drift of A . Use standard 10%,
1/4W carbon composition or equivalent resistors.
Sense Connection
H
and R
Alternate Ground
B
DAC702
H
H
CC
CC
DD
R
F
7
*
must be adjusted for maximum common-mode
L
. Note that if R
4
is negligible.
2.45k
R
1µF
1µF
1µF
(mA)
(mA)
( V)
( A)
DAC
R
(V)
(V)
B
*
R
F
Common
R
4
10k
System Ground
Point
R
I
+9.99985
OUT
F
16-BIT
3
153
0
is negligible, the circuit of
R
B
COM
COM
2.45k
–0.99997
+1.00000
‡
R
16-BIT
A
+V
+V
0.031
–V
DAC
1
1
DAC701 UNIPOLAR
Sense Output
±15VDC
+5VDC
Supply
Supply
R
R
R
+9.99969
15-BIT
1
2
3
305
R
0
L
VOLTAGE OUTPUT MODELS
ANALOG OUTPUT MODEL
9
+9.99939
14-BIT
610
0
The D/A converter and the wiring to its connectors should be
located to provide optimum isolation from sources of RFI
and EMI. The key concept in elimination of RF radiation or
pickup is loop area; therefore, signal leads and their return
conductors should be kept close together. This reduces the
external magnetic field along with any radiation. Also, if a
single lead and its return conductor are wired close together,
they present a small flux-capture cross section for any
external field. This reduces radiation pickup in the circuit.
FIGURE 8. Differential Sensing Output Op Amp
ANALOG OUTPUT
ANALOG OUTPUT
DAC702 BIPOLAR
To +V
To –V
To V
DAC702
Sense Connection
+1.00000
–0.99994
Alternate Ground
15-BIT
0.061
CC
CC
DD
DAC702
R
F
*
Configuration.
+9.99960
–10.0000
16-BIT
305
R
1µF
1µF
1µF
DAC
10k
DAC701, 702, 703
R
*
F
R
F
Common
R
4
DAC703 BIPOLAR
System Ground
Point
2.45k
I
R
OUT
R
DAC
6
+9.99939
–10.0000
15-BIT
610
COM
COM
A
+V
–V
+V
R
–0.99988
+1.00000
1
R
14-BIT
7
0.122
5
+
R
±15VDC
3
R
R
+5VDC
Supply
Supply
7
6
R
R
R
=
=
5
1
2
+9.99878
–10.0000
R
R
R
14-BIT
F
DAC
L
1224
+
R
Sense
Output
1
®