MCP4728 datasheet(33/50 Pages) MICROCHIP

33 / 50 page

Quick Start Instructions

DS51837A-page 29

FIGURE 1-19:

VOUT for Example 6: VOUT after Sequential Write Command.

OUT

REF

()

4096

------------------------------- G

Where:

VREF

=VDD if external VREF is selected

2.048V if internal VREF is selected.

Input code

LSB

VREF/4096

OUTB

4095

()

4096

---------------------------------- G

4096

–

4096

---------------------

⎝⎠

⎛⎞

DD 1

4096

------------

–

⎝⎠

⎛⎞

LSB

–

In Script file, VREF = VDD, Gain (GX) = 1, Dn for Channel B = 0FFF (hex) = 4095 (decimal)

(A) DAC A Output:

Note that Dn and Gain (Gx) must be selected with the following conditions:

OUT

REF

()

4096

------------------------------- G

≤

(B) DAC B Output:

(D) DAC D Output:

No change. Keep its output with previous settings.

In Script file, VREF = Internal, Gain (GX) = 1, Dn for Channel C = 0FFF (hex) = 4095 (decimal)

OUTC

REF

4095

()

4096

------------------------------------ G

REF

4096

–

4096

---------------------

⎝⎠

⎛⎞

REF 1

4096

------------

–

⎝⎠

⎛⎞

REF

LSB

–

where V

REF = internal = 2.048V, LSB =0.5 mV

In Script file, VREF = Internal, Gain = 2, Dn for Channel D = 00FF (hex) = 255 (decimal)

OUTD

REF

255

4096

----------------------------G

REF

255

4096

------------

⎝⎠

⎛⎞

REF 0.06226

() 2

()

0.255V

= 2.0475

where V

REF = internal = 2.048V

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