Datasheet
© 2011-2012 Microchip Technology Inc. DS22272C-page 39
MCP4706/4716/4726
TABLE 4-1: DAC INPUT CODE VS. ANALOG OUTPUT (V
OUT
) (V
DD
= 5.0V)
Device
Volatile DAC
Register Value
V
RL
(1)
LSb Gain
Selection
(2)
V
OUT
(4)
Equation uV Equation V
MCP4726
(12-bit)
1111 1111 1111
5.0V 5.0V/4096 1,220.7
1x V
RL
* (4095/4096) * 1 4.998779
2.5V 2.5V/4096 610.4
1x V
RL
* (4095/4096) * 1 2.499390
2x
(3)
V
RL
* (4095/4096) * 2) 4.998779
0111 1111 1111
5.0V 5.0V/4096 1,220.7 1x V
RL
* (2047/4096) * 1) 2.498779
2.5V 2.5V/4096 610.4
1x V
RL
* (2047/4096) * 1) 1.249390
2x
(3)
V
RL
* (2047/4096) * 2) 2.498779
0011 1111 1111
5.0V 5.0V/4096 1,220.7 1x V
RL
* (1023/4096) * 1) 1.248779
2.5V 2.5V/4096 610.4
1x V
RL
* (1023/4096) * 1) 0.624390
2x
(3)
V
RL
* (1023/4096) * 2) 1.248779
0000 0000 0000
5.0V 5.0V/4096 1,220.7 1x V
RL
* (0/4096) * 1) 0
2.5V 2.5V/4096 610.4
1x V
RL
* (0/4096) * 1) 0
2x
(3)
V
RL
* (0/4096) * 2) 0
MCP4716
(10-bit)
11 1111 1111
5.0V 5.0V/1024 4,882.8 1x V
RL
* (1023/1024) * 1 4.995117
2.5V 2.5V/1024 2,441.4
1x V
RL
* (1023/1024) * 1 2.497559
2x
(3)
V
RL
* (1023/1024) * 2 4.995117
01 1111 1111
5.0V 5.0V/1024 4,882.8 1x V
RL
* (511/1024) * 1 2.495117
2.5V 2.5V/1024 2,441.4
1x V
RL
* (511/1024) * 1 1.247559
2x
(3)
V
RL
* (511/1024) * 2 2.495117
00 1111 1111
5.0V 5.0V/1024 4,882.8 1x V
RL
* (255/1024) * 1 1.245117
2.5V 2.5V/1024 2,441.4
1x V
RL
* (255/1024) * 1 0.622559
2x
(3)
V
RL
* (255/1024) * 2 1.245117
00 0000 0000
5.0V 5.0V/1024 4,882.8 1x V
RL
* (0/1024) * 1 0
2.5V 2.5V/1024 2,441.4
1x V
RL
* (0/1024) * 1 0
2x
(3)
V
RL
* (0/1024) * 1 0
MCP4706
(8-bit)
1111 1111
5.0V 5.0V/256 19,531.3 1x V
RL
* (255/256) * 1 4.980469
2.5V 2.5V/256 9,765.6
1x V
RL
* (255/256) * 1 2.490234
2x
(3)
V
RL
* (255/256) * 2 4.980469
0111 1111
5.0V 5.0V/256 19,531.3 1x V
RL
* (127/256) * 1 2.480469
2.5V 2.5V/256 9,765.6
1x V
RL
* (127/256) * 1 1.240234
2x
(3)
V
RL
* (127/256) * 2 2.480469
0011 1111
5.0V 5.0V/256 19,531.3
1x V
RL
* (63/256) * 1 1.230469
2.5V 2.5V/256 9,765.6
1x V
RL
* (63/256) * 1 0.615234
2x
(3)
V
RL
* (63/256) * 2 1.230469
0000 0000
5.0V 5.0V/256 19,531.3
1x V
RL
* (0/256) * 1 0
2.5V 2.5V/256 9,765.6
1x V
RL
* (0/256) * 1 0
2x
(3)
V
RL
* (0/256) * 2 0
Note 1: V
RL
is the resistor ladder’s reference voltage. It is independent of V
REF1
:V
REF0
selection.
2: Gain selection of 2x requires voltage reference source to come from V
REF
pin and
requires V
REF
pin voltage ≤ V
DD
/ 2.
3: Requires G = 1, V
REF1
:V
REF0
= 10 or ‘11’, and V
RL
≤ V
DD
/2.
4: These theoretical calculations do not take into account the Offset and Gain errors.