MCP4728 Microchip Technology Inc., MCP4728 Datasheet - Page 53

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

7.6
The MCP4728 device is a rail-to-rail output DAC
designed to operate with a V
Its output amplifier of each channel is robust enough to
drive common, small-signal loads directly, thus
eliminating the cost and size of external buffers for
most applications. Since each channel has its own
configuration bits for selecting the voltage reference,
gain, power-down, etc., the MCP4728 device offers
great simplicity and flexibility to use for various DAC
applications.
© 2009 Microchip Technology Inc.
Application Examples
DD
range of 2.7V to 5.5V.
7.6.1
A common application for the MCP4728 device is a
digitally-controlled set point or a calibration of variable
parameters such as sensor offset or bias point.
Figure 7-3
Let us consider that the application requires different
trip voltages (Trip 1 - Trip 4). Assuming the DAC output
voltage requirements are given as shown in
examples of sending the Sequential Write and Fast
Write commands are shown in
Figure
TABLE 7-1:
DAC Channel
V
V
V
V
OUT
OUT
OUT
OUT
7-5.
shows an example of the set point settings.
A
B
C
D
DC SET POINT OR CALIBRATION
VOLTAGE SETTINGS
EXAMPLE: SETTING V
EACH CHANNEL
Reference
Voltage
Internal
Internal
V
V
DD
DD
MCP4728
DS22187A-page 53
Figure 7-4
DAC Output
V
DD
2.048V
4.096V
(V
V
DD
- 1 LSB
Table
OUT
OUT
/2
)
OF
7-1,
and