HI3-DAC85V-4 INTERSIL [Intersil Corporation], HI3-DAC85V-4 Datasheet - Page 6

• Manufacturer Part Number: HI3-DAC85V-4
• Description: 12-Bit, Low Cost, Monolithic D/A Converters
• Manufacturer: INTERSIL [Intersil Corporation]

Reference Supply
An internal 6.3V reference is provided on board the
HI-DAC80V/HI-DAC85V. The voltage (pin 24) is accurate to
for specified operation. This reference may be used exter-
nally, provided current drain is limited to 2.5mA. An external
buffer amplifier is recommended if this reference is to be
used to drive other system components. Otherwise, varia-
tions in the load driven by the reference will result in gain
variations of the HI-DAC80V/HI-DAC85V. All gain adjust-
ments should be made under constant load conditions.
Output Voltage Ranges
10k TO
Unipolar
Bipolar
0.8% and must be connected to the reference input (pin 16)
100k
R1
+V
-V
S
S
2.8M
24
17
16
23
0.01 F
0 to +10V
FIGURE 2. HI-DAC80V/HI-DAC85V
TABLE 2. RANGE CONNECTIONS
0 to +5V
RANGE
2.5V
10V
5V
6.3K
12.6k
CONTROL
AMP
+
-
PIN 15
18
18
18
18
19
CONNECT
PIN 17
NC
NC
5k
5k
20
20
20
-
+
HI-DAC80V, HI-DAC85V
18
19
20
15
21
M
3.9
PIN 19
NC
NC
20
20
15
100k
R2
5k
TO
+V
-V
10-1039
S
S
UNIPOLAR CALIBRATION
Step 1:
Step 2:
BIPOLAR CALIBRATION
Step 1:
Step 2:
This Bipolar procedure adjusts the output range end points. The
maximum error at zero (half scale) will not exceed the Linearity
Error. See the “Accuracy” Specifications.
TABLE 3. GAIN AND OFFSET CALIBRATIONS
Offset
Gain
Offset
Gain
Turn all bits OFF (11 . . . 1)
Adjust R2 for 0V out
Turn all bits ON (00 . . . 0)
Adjust R1 for FS - 1 LSB
That is:
Turn all bits OFF (11 . . . 1)
Adjust R2 for Negative FS
That is:
Turn all bits ON (00 . . . 0)
Adjust R1 for Positive FS - 1 LSB
That is:
4.9988 for 0 to +5V range
9.9976 for 0 to +10V range
-10V for 10V range
-5V for
-2.5V for
+9.9951V for 10V Range
+4.9976V for 5V Range
+2.4988V for 2.5V Range
5V range
2.5V range