AD5531BRU-REEL7 datasheet(14/20 Pages) AD

No de pièce	AD5531BRU-REEL7

Description	Serial Input, Voltage Output 12-/14-Bit Digital-to-Analog Converters

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Fabricant	AD [Analog Devices]

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AD5530/AD5531

Rev. B | Page 14 of 20

C1

1µF

R1

10kΩ

9

2

6

+15V

VOUT

DUTGND

GND

SIGNAL

GND

SIGNAL

GND

1ADDITIONAL PINS OMITTED FOR CLARITY.

VOUT

(–10V TO +10V)

REFIN

REFAGND

AD5530/

AD55311

VSS

–15V

5

4

AD586

OUTPUT VOLTAGE

The DAC transfer function is as follows:

N

D

2

VOUT = 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

2 REFIN

–2 REFIN

DAC INPUT CODE 000 001

(3)FFF

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)

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