AD7376ARUZ10-R7 datasheet(16/20 Pages) AD

16 / 20 page

AD7376

Rev. D | Page 16 of 20

APPLICATIONS INFORMATION

HIGH VOLTAGE DAC

The AD7376 can be configured as a high voltage DAC as high

as 30 V. The circuit is shown in Figure 32. The output is



















 





128

)

(

(5)

Where D is the decimal code from 0 to 127.

AD7376

AD8512

V+

V–

AD8512

VOUT

VDD

U1B

VDD

RBIAS

ADR512

100kΩ

U1A

Figure 32. High Voltage DAC

PROGRAMMABLE POWER SUPPLY

With a boost regulator such as ADP1611, AD7376 can be used

as the variable resistor at the regulator’s FB pin to provide the

programmable power supply (see Figure 33). The output is

































128

(6)

Note that the AD7376’s VDD is derived from the output. Initially

L1 acts as a short, and VDD is one diode voltage drop below +5 V.

The output slowly establishes to the final value.

The AD7376 shutdown sleep-mode programming can be used

to program a desirable preset level at power-up.

AD7376

ADP1611

1.23V

150pF

220kΩ

COUT

10µF

VOUT

4.7µF

GND

COMP

0.1µF

VDD

100kΩ

CIN

10µF

8.5kΩ

CSS

22nF

Figure 33. Programmable Power Supply

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