MCP4728 Microchip Technology Inc., MCP4728 Datasheet - Page 55

• Manufacturer Part Number: MCP4728
• Description: 12-bit, Quad Digital-to-analog Converter With Eeprom Memory
• Manufacturer: Microchip Technology Inc.

FIGURE 7-4:
© 2009 Microchip Technology Inc.
Start
S 1 1 0 0 0 0 0 0 A 0 1 0 1 0 0 0 0 A 0 0 0 0 1 0 0 0 A 0 0 0 0 0 0 0 0 A
Device Addressing
1st Byte
Sequential Write Command for Setting Test Points in
Expected Output Voltage at Each Channel:
R/W
V
V
V
V
OUT
OUT
OUT
OUT
C
A
C
B
Multiple Write
=
=
=
=
Command
V
V
V
V
DD
REF
REF
DD
×
×
×
×
----------- -
4096
----------- -
4096
----------- - G
4096
----------- - G
4096
D
D
D
D
n
n
n
n
Selecting
Channel A for
Starting channel
UDAC
=
=
x
x
0 0 0 0 1 1 1 1 A 1 1 1 1 1 1 1 1 A P
V
V
0 0 0 0 1 1 1 1 A 1 1 1 1 1 1 1 1 A
0 0 0 0 1 1 1 1 A 1 1 1 1 1 1 1 1 A
V
V
=
REF
REF
=
DD
DD
V
2.048
2.048
REF
×
×
2048
----------- -
4096
4095
----------- -
4096
V
REF
G
G
×
×
X
X
4095
----------- - × 2
4096
2048
----------- - × 2
4096
ACK (MCP4728)
G
Update DAC A Input Register at this ACK pulse.
X
Update DAC A Input Register at this ACK pulse.
Update DAC A Input Register at this ACK pulse.
=
=
G
V
---------- -
X
DD
2
(
V
Update DAC A Input Register at this ACK pulse.
DD
=
=
V ( )
4.096
–
2.048
Dn = 4095
Dn = 2048
LSB
Dn = 4095
Figure
ACK (MCP4728)
ACK (MCP4728)
ACK (MCP4728)
Dn = 2
)
V ( )
V ( )
V ( )
7-3.
11
= 2048
MCP4728
DS22187A-page 55
Stop