Microchip Technology MCP4728EV Data Sheet
© 2010 Microchip Technology Inc.
DS22187E-page 27
MCP4728
4.9
DAC Input Code Vs. DAC Analog
Output
Output
shows an example of the DAC input data
code vs. analog output. The MSB of the input data is
always transmitted first and the format is unipolar
binary.
always transmitted first and the format is unipolar
binary.
TABLE 4-5:
LDAC AND UDAC
CONDITIONS VS. OUTPUT
UPDATE
CONDITIONS VS. OUTPUT
UPDATE
LDAC Pin UDAC Bit
DAC Output (V
OUT
)
0
0
Update all DAC channel
outputs
outputs
0
1
Update all DAC channel
outputs
outputs
1
0
Update a selected DAC
channel output
channel output
1
1
No update
TABLE 4-6:
DAC INPUT CODE VS. ANALOG OUTPUT (V
OUT
)
DAC Input Code
V
REF
= Internal (2.048 V)
V
REF
= V
DD
Gain
Selection
Nominal Output Voltage (V)
(See
)
Gain
Selection
Nominal Output Voltage (V)
111111111111
x1
V
REF
- 1 LSB
Ignored
V
DD
- 1 LSB
x2
2*V
REF
- 1 LSB
111111111110
x1
V
REF
- 2 LSB
V
DD
- 2 LSB
x2
2*V
REF
- 2 LSB
000000000010
x1
2 LSB
2 LSB
x2
2 LSB
000000000001
x1
1 LSB
1 LSB
x2
1 LSB
000000000000
x1
0
0
x2
0
Note 1:
(a) LSB with gain of 1 = 0.5 mV, and (b) LSB with gain of 2 = 1 mV.