Datasheet

AD5530/AD5531
Rev. B | Page 14 of 20
0
0938-021
C1
1µF
R1
10kΩ
9
2
6
+15
V
V
OUT
V
OUT
DUTGND
GND
SIGNAL
GND
SIGNAL
GND
1
ADDITIONAL PINS OMITTED FOR CLARITY.
V
OUT
(–10V TO +10V)
REFIN
REFAGND
AD5530/
AD5531
1
V
SS
–15V
5
4
AD586
OUTPUT VOLTAGE
The DAC transfer function is as follows:
N
D
2
V
OUT
= 2 × [2 × ((REFIN − REFAGND) × ) + 2 ×
REFAGND − REFIN] − DUTGND
where:
D is the decimal data-word loaded to the DAC register.
N is the resolution of the DAC.
BIPOLAR CONFIGURATION
Figure 21 shows the AD5530/AD5531 in a bipolar circuit
configuration. REFIN is driven by the AD586, 5 V reference,
and the REFAGND and DUTGND pins are tied to GND. This
results in a bipolar output voltage ranging from −10 V to +10 V.
Resistor R1 is provided (if required) for gain adjust.
Figure 21. Bipolar ±10 V Operation
00938-022
2 REFIN
–2 REFIN
DAC INPUT CODE 000 001 (3)FFF
DAC OUTPUT VOLTAGE
0V
Figure 22
shows the transfer function of the DAC when REFAGND is tied
to 0 V.
Figure 22. Output Voltage vs. DAC Input Codes (Hex)