MCP4726 datasheet(38/86 Pages) MICROCHIP

38 / 86 page

MCP4706/4716/4726

DS22272A-page 38

TABLE 4-1:

DAC INPUT CODE VS. ANALOG OUTPUT (VOUT) (VDD = 5.0V)

Device

Volatile DAC

VRL

(1)

LSb

Gain

Selection

(2)

VOUT

(4)

Equation

MCP4726

(12-bit)

1111 1111 1111

5.0V

5.0V/4096

1,220.7

VRL * (4095/4096) * 1

4.998779

2.5V

2.5V/4096

610.4

VRL * (4095/4096) * 1

2.499390

2x(3)

VRL * (4095/4096) * 2)

4.998779

0111 1111 1111

5.0V

5.0V/4096

1,220.7

VRL * (2047/4096) * 1)

2.498779

2.5V

2.5V/4096

610.4

VRL * (2047/4096) * 1)

1.249390

2x(3)

VRL * (2047/4096) * 2)

2.498779

0011 1111 1111

5.0V

5.0V/4096

1,220.7

VRL * (1023/4096) * 1)

1.248779

2.5V

2.5V/4096

610.4

VRL * (1023/4096) * 1)

0.624390

2x(3)

VRL * (1023/4096) * 2)

1.248779

0000 0000 0000

5.0V

5.0V/4096

1,220.7

VRL * (0/4096) * 1)

2.5V

2.5V/4096

610.4

VRL * (0/4096) * 1)

2x(3)

VRL * (0/4096) * 2)

MCP4716

(10-bit)

11 1111 1111

5.0V

5.0V/1024

4,882.8

VRL * (1023/1024) * 1

4.995117

2.5V

2.5V/1024

2,441.4

VRL * (1023/1024) * 1

2.497559

2x(3)

VRL * (1023/1024) * 2

4.995117

01 1111 1111

5.0V

5.0V/1024

4,882.8

VRL * (511/1024) * 1

2.495117

2.5V

2.5V/1024

2,441.4

VRL * (511/1024) * 1

1.247559

2x(3)

VRL * (511/1024) * 2

2.495117

00 1111 1111

5.0V

5.0V/1024

4,882.8

VRL * (255/1024) * 1

1.245117

2.5V

2.5V/1024

2,441.4

VRL * (255/1024) * 1

0.622559

2x(3)

VRL * (255/1024) * 2

1.245117

00 0000 0000

5.0V

5.0V/1024

4,882.8

VRL * (0/1024) * 1

2.5V

2.5V/1024

2,441.4

VRL * (0/1024) * 1

2x(3)

VRL * (0/1024) * 1

MCP4706

(8-bit)

1111 1111

5.0V

5.0V/256

19,531.3

VRL * (255/256) * 1

4.980469

2.5V

2.5V/256

9,765.6

VRL * (255/256) * 1

2.490234

2x(3)

VRL * (255/256) * 2

4.980469

0111 1111

5.0V

5.0V/256

19,531.3

VRL * (127/256) * 1

2.480469

2.5V

2.5V/256

9,765.6

VRL * (127/256) * 1

1.240234

2x(3)

VRL * (127/256) * 2

2.480469

0011 1111

5.0V

5.0V/256

19,531.3

VRL * (63/256) * 1

1.230469

2.5V

2.5V/256

9,765.6

VRL * (63/256) * 1

0.615234

2x(3)

VRL * (63/256) * 2

1.230469

0000 0000

5.0V

5.0V/256

19,531.3

VRL * (0/256) * 1

2.5V

2.5V/256

9,765.6

VRL * (0/256) * 1

2x(3)

VRL * (0/256) * 2

Note 1:

VRL is the resistor ladder’s reference voltage. It is independent of VREF1:VREF0 selection.

Gain selection of 2x requires voltage reference source to come from VREF pin and

requires VREF pin voltage ≤ VDD / 2.

Requires G = ‘1’, VREF1:VREF0 = ‘10’ or ‘11’, and VRL ≤ VDD / 2.

These theoretical calculations do not take into account the offset and gain errors.

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