MCP4728 Datasheet, PDF (1/66 Pages) Microchip Technology – 12-Bit, Quad Digital-to-Analog Converter with EEPROM Memory

MCP4728
12-Bit, Quad Digital-to-Analog Converter with EEPROM Memory
Features
• 12-Bit Voltage Output DAC with 4 Buffered
Outputs
• On-Board Non-Volatile Memory (EEPROM) for
DAC Codes and I²C^TM Address Bits
• Internal or External Voltage Reference Selection
• Output Voltage Range:
- Using Internal V_REF (2.048V):
0.000V to 2.048V with Gain Setting = 1
0.000V to 4.096V with Gain Setting = 2
- Using External V_REF (V_DD): 0.000V to V_DD
• ±0.2 LSB DNL (typical)
• Fast Settling Time: 6 µs (typical)
• Normal or Power-Down Mode
• Low Power Consumption
• Single-Supply Operation: 2.7V to 5.5V
• I²C Interface:
- Address bits: User Programmable to
EEPROM
- Standard (100 kbps), Fast (400 kbps) and
High Speed (3.4 Mbps) Modes
• 10-Lead MSOP Package
• Extended Temperature Range: -40°C to +125°C
Applications
• Set Point or Offset Adjustment
• Sensor Calibration
• Closed-Loop Servo Control
• Low Power Portable Instrumentation
• PC Peripherals
• Programmable Voltage and Current Source
• Industrial Process Control
• Instrumentation
Description
The MCP4728 device is a quad, 12-bit voltage output
Digital-to-Analog Convertor (DAC) with non-volatile
memory (EEPROM). Its on-board precision output
amplifier allows it to achieve rail-to-rail analog output
swing.
The DAC input codes, device configuration bits, and
I²C address bits are programmable to the non-volatile
memory (EEPROM) by using I²C serial interface
commands. The non-volatile memory feature enables
the DAC device to hold the DAC input codes during
power-off time, allowing the DAC outputs to be
available immediately after power-up with the saved
settings. This feature is very useful when the DAC
device is used as a supporting device for other devices
in applications network.
The MCP4728 device has a high precision internal
voltage reference (V_REF = 2.048V). The user can select
the internal reference or external reference (V_DD) for
each channel individually.
Each channel can be operated in normal mode or
power-down mode individually by setting the
configuration register bits. In power-down mode, most
of the internal circuits in the powered down channel are
turned off for power-savings and the output amplifier
can be configured to present a known low, medium, or
high resistance output load.
The MCP4728 device includes a Power-On-Reset
(POR) circuit to ensure reliable power-up and an
on-board charge pump for the EEPROM programming
voltage.
The MCP4728 has a two-wire I²C compatible serial
interface for standard (100 kHz), fast (400 kHz), or high
speed (3.4 MHz) mode.
The MCP4728 DAC is an ideal device for applications
requiring design simplicity with high precision, and for
applications requiring the DAC device settings to be
saved during power-off time.
The MCP4728 device is available in a 10-lead MSOP
package and operates from a single 2.7V to 5.5V
supply voltage.
© 2009 Microchip Technology Inc.
DS22187C-page 1