AD9838 datasheet(8/32 Pages) AD

Part #	AD9838

Description	11 mW Power, 2.3 V to 5.5 V, Complete DDS Power-down option

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Manufacturer	AD [Analog Devices]

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8 / 32 page

AD9838

Rev. A | Page 8 of 32

Pin No.

Mnemonic

Description

18

FSADJUST

Full-Scale Adjust Control. A resistor (RSET) is connected between this pin and AGND to determine the magnitude

of the full-scale DAC current. The relationship between RSET and the full-scale current is as follows:

IOUT FULL SCALE = 18 × FSADJUST/RSET

FSADJUST = 1.14 V nominal, RSET = 6.8 kΩ typical

19

REFOUT

Voltage Reference Output. The AD9838 has an internal 1.20 V reference that is available at this pin.

20

COMP

DAC Bias Pin. This pin is used for decoupling the DAC bias voltage.

EP

Exposed Pad. Connect the exposed pad to ground.

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