MCP4728
12-Bit, Quad Digital-to-Analog Converter with EEPROM Memory
Features Description
12-Bit Voltage Output DAC with Four Buffered The MCP4728 device is a quad, 12-bit voltage output
Outputs Digital-to-Analog Convertor (DAC) with nonvolatile
memory (EEPROM). Its on-board precision output
On-Board Nonvolatile Memory (EEPROM) for
2
amplifier allows it to achieve rail-to-rail analog output
DAC Codes and I C Address Bits
swing.
Internal or External Voltage Reference Selection
The DAC input codes, device configuration bits, and
Output Voltage Range:
2
I C address bits are programmable to the nonvolatile
- Using Internal V (2.048V):
REF
2
memory (EEPROM) by using I C serial interface
0.000V to 2.048V with Gain Setting = 1
commands. The nonvolatile memory feature enables
the DAC device to hold the DAC input codes during
0.000V to 4.096V with Gain Setting = 2
power-off time, allowing the DAC outputs to be
- Using External V (V ):
REF DD
available immediately after power-up with the saved
0.000V to V
DD settings. This feature is very useful when the DAC
device is used as a supporting device for other devices
0.2 Least Significant Bit (LSB) Differential
in the applications network.
Nonlinearity (DNL) (typical)
Fast Settling Time: 6 s (typical) The MCP4728 device has a high precision internal
voltage reference (V = 2.048V). The user can select
Normal or Power-Down Mode
REF
the internal reference or external reference (V ) for
DD
Low Power Consumption
each channel individually.
Single-Supply Operation: 2.7V to 5.5V
2 Each channel can be operated in Normal mode or
I C Interface:
Power-Down mode individually by setting the
- Address bits: User Programmable to
configuration register bits. In Power-Down mode, most
EEPROM
of the internal circuits in the powered down channel are
- Standard (100 kbps), Fast (400 kbps) and
turned off for power savings, and the output amplifier
High Speed (HS) Mode (3.4 Mbps)
can be configured to present a known low, medium, or
10-Lead MSOP Package
high resistance output load.
Extended Temperature Range: -40C to +125C
The MCP4728 device includes a Power-on Reset
(POR) circuit to ensure reliable power-up and an
Applications
on-board charge pump for the EEPROM programming
voltage.
Set Point or Offset Adjustment
2
The MCP4728 has a two-wire I C compatible serial
Sensor Calibration
interface for standard (100 kHz), fast (400 kHz), or high
Closed-Loop Servo Control
speed (3.4 MHz) mode.
Low Power Portable Instrumentation
The MCP4728 DAC is an ideal device for applications
PC Peripherals
requiring design simplicity with high precision, and for
Programmable Voltage and Current Source
applications requiring the DAC device settings to be
Industrial Process Control
saved during power-off time.
Instrumentation
The MCP4728 device is available in a 10-lead MSOP
Bias Voltage Adjustment for Power Amplifiers
package and operates from a single 2.7V to 5.5V
supply voltage.
2010 Microchip Technology Inc. DS22187E-page 1MCP4728
Package Type
MCP4728
MSOP
V
1 10 V
DD
SS
9
SCL 2 V D
OUT
SDA 8 V C
3
OUT
7
LDAC 4 V B
OUT
RDY/BSY 5 6 V A
OUT
Functional Block Diagram
LDAC
EEPRO M A
Output
V A
UDAC REF
Gain
V Logic
DD
Control
OP
INPUT OUTPUT V A
OUT
STRING DAC A
AMP A
V
SS REGISTER A REGISTER A
Power Down
EEP ROM B
V B Control
UDAC REF Output
Gain
Logic
Control
OP
INPUT OUTPUT
V B
STRING DAC B OUT
AMP B
REGISTER B REGISTER B
SDA
EEPRO M C Power Down
V C
UDAC
REF Output
Control
Gain
Logic
Control
SCL
OP
INPUT
OUTPUT
V C
STRING DAC C OUT
REGISTER C AMP C
REGISTER C
EEPRO M D
Power Down
V D
UDAC
REF
Output
Control
Gain
Logic
Control
INPUT OP
OUTPUT
V D
RDY/BSY STRING DAC D OUT
REGISTER D REGISTER D AMP D
Internal V
Power Down
REF V Selector V
REF REF
(2.048V)
Control
(V A, V B, V C, V D)
REF REF REF REF
V
DD
DS22187E-page 2 2010 Microchip Technology Inc.
2
I C Interface Logic