AD9735BBCZ datasheet(49/72 Pages) AD

поискавой системы для электроныых деталей

AD9735BBCZ датащи(PDF) 49 Page - Analog Devices

49 / 72 page

Data Sheet

AD9734/AD9735/AD9736

Rev. B | Page 49 of 72

The full-scale output current range is approximately 10 mA to

30 mA for register values from 0x000 to 0x3FF. The default

value of 0x200 generates 20 mA full scale. The typical range is

shown in Figure 89.

200

400

600

800

DAC GAIN CODE

1000

Figure 89. IFS vs. DAC Gain Code

Always connect a 10 kΩ resistor from the I120 pin to ground

and use the digital controls to vary the full-scale current. The

AD973x is not a multiplying DAC. Applying an analog signal to

I120 is not supported.

VREF (Pin C14) must be bypassed to ground with a 1 nF

capacitor. The band gap voltage is present on this pin and can

be buffered for use in external circuitry. The typical output

impedance is near 5 kΩ. If desired, an external reference can be

used to overdrive the internal reference by connecting it to the

VREF pin.

IPTAT (Pin D14) is used for factory testing. Leave this pin

floating.

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