AD5530 Analog Devices, AD5530 Datasheet - Page 14

• Manufacturer Part Number: AD5530
• Description: Serial Input, Voltage Output 12-Bit D/A Converter
• Manufacturer: Analog Devices

Specifications of AD5530

• Resolution (bits): 12bit
• Dac Update Rate: 50kSPS
• Dac Settling Time: 20µs
• Max Pos Supply (v): +16.5V
• Single-supply: No
• Dac Type: Voltage Out
• Dac Input Format: Ser,SPI

AD5530/AD5531
OUTPUT VOLTAGE
The DAC transfer function is as follows:
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.
shows the transfer function of the DAC when REFAGND is tied
to 0 V.
V
REFAGND − REFIN] − DUTGND
OUT
= 2 × [2 × ((REFIN − REFAGND) ×
2
D
N
) + 2 ×
Figure 22
Rev. B | Page 14 of 20
1µF
C1
1
DAC INPUT CODE
ADDITIONAL PINS OMITTED FOR CLARITY.
9
Figure 22. Output Voltage vs. DAC Input Codes (Hex)
–2 REFIN
SIGNAL
AD586
2 REFIN
GND
2
4
0V
Figure 21. Bipolar ±10 V Operation
6
5
000 001
R1
10kΩ
REFIN
REFAGND
AD5531
AD5530/
+15V
V
–15V
V
OUT
SS
DUTGND
V
GND
1
OUT
SIGNAL
GND
V
(–10V TO +10V)
OUT
(3)FFF