MCP4728 Microchip Technology Inc., MCP4728 Datasheet - Page 25

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

TABLE 4-3:
© 2009 Microchip Technology Inc.
DAC1, DAC0
(A2, A1, A0)
RDY/BSY
PD1, PD0
Bit Name
UDAC
V
G
REF
X
CONFIGURATION BITS
This is a status indicator (flag) of EEPROM programming activity:
1 = EEPROM is not in programming mode
0 = EEPROM is in programming mode
Note: RDY/BSY status can also be monitored at the RDY/BSY pin.
Device I
Voltage Reference Selection bit:
0 = V
1 = Internal voltage reference (2.048V)
Note: Internal voltage reference circuit is turned off if all channels select external reference
(V
DAC Channel Selection bits:
00 = Channel A
01 = Channel B
10 = Channel C
11 = Channel D
Power-Down selection bits:
00 = Normal Mode
01 = V
10 = V
off.
11 = V
off.
Note: See
Gain selection bit:
0 = x1 (gain of 1)
1 = x2 (gain of 2)
Note: Applicable only when internal V
1 regardless of the gain selection bit setting.
DAC latch bit. Upload the selected DAC input register to its output register (V
0 = Upload. Output (V
1 = Do not upload.
Note: UDAC bit affects the selected channel only.
REF
DD
= V
OUT
OUT
OUT
2
C address bits. See Section 5.3 “MCP4728 Device Addressing” for more details.
DD)
Table 4-7
is loaded with 1 kΩ resistor to ground. Most of the channel circuits are powered off.
is loaded with 100 kΩ resistor to ground. Most of the channel circuits are powered
is loaded with 500 kΩ resistor to ground. Most of the channel circuits are powered
.
and
OUT
Figure 4-1
) is updated.
for more details.
REF
Functions
is selected. If V
REF
= V
DD
, the device uses a gain of
MCP4728
OUT
DS22187A-page 25
):