MCP4728-E/UN Microchip Technology, MCP4728-E/UN Datasheet - Page 40

• Manufacturer Part Number: MCP4728-E/UN
• Description: IC DAC 12BIT W/I2C 10-MSOP
• Manufacturer: Microchip Technology

Specifications of MCP4728-E/UN

• Number Of Converters: 4
• Settling Time: 6µs
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Number Of Bits: 12
• Data Interface: I²C
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Number Of Dac Outputs: 4
• Resolution: 12 bit
• Interface Type: I2C
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Supply Current: 110 mA
• Voltage Reference: 2.048 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: MCP4728EV - BOARD EVAL 12BIT 4CH DAC MCP4728
• Power Dissipation (max): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

MCP4728
FIGURE 5-9:
from Starting Channel to Channel D. The sequential input register starts with the "Starting Channel" and
ends at Channel D. For example, if DAC1:DAC0 = 00, then it starts with channel A and ends at channel D.
If DAC1:DAC0 = 01, then it starts with channel B and ends at Channel D. Note that this command can
send up to 10 bytes including the device addressing and command bytes. Any byte after the 10th byte is
ignored.
DS22187E-page 40
Command Type Bits:
Start
S
Note 1:
(C2 C1 C0 W1 W2)
0
Sequential Write
1
Command
1
2:
1
Device Addressing
0
The MCP4728 device starts writing EEPROM at the falling edge of the 4th byte’s ACK pulse.
V
If UDAC = 0 or LDAC Pin = 0: V
EEPROM Write:
0
OUT
1
1st byte
0
Update:
0 DAC1 DAC0 UDAC A V
A2 A1 A0
Sequential Write Command: Write DAC Input Registers and EEPROM Sequentially
Starting Channel
Sequential Write
C2=0
2nd Byte
Select
ACK (MCP4728)
R/W
0
C1=1
A
V
Repeat Bytes of the 3rd - 4th Bytes
for the Starting Channel + 1, ... until Channel D.
REF
OUT
C0=0
REF
PD1 PD0 Gx D11 D10 D9 D8 A D7 D6 D5 D4 D3 D2 D1 D0 A
is updated after the 4th byte’s ACK is issued.
PD1 PD0 Gx D11 D10 D9 D8 A D7 D6 D5 D4 D3 D2 D1 D0 A
W1=1
3rd Byte
3rd Byte
DAC Input Register of Starting Channel
DAC Input Register of Channel D
W0=0
(Last Channel)
ACK (MCP4728)
ACK (MCP4728)
© 2010 Microchip Technology Inc.
4th Byte
4th Byte
Notes 1 and 2
Note 1
Stop
P