MCP4725 Datasheet, PDF (1/42 Pages) Microchip Technology – 12-Bit Digital-to-Analog Converter with EEPROM Memory in SOT-23-6

MCP4725
12-Bit Digital-to-Analog Converter with EEPROM Memory
in SOT-23-6
Features
• 12-Bit Resolution
• On-Board Non-Volatile Memory (EEPROM)
• ±0.2 LSB DNL (typical)
• External A0 Address Pin
• Normal or Power-Down Mode
• Fast Settling Time of 6 µs (typical)
• External Voltage Reference (V_DD)
• Rail-to-Rail Output
• Low Power Consumption
• Single-Supply Operation: 2.7V to 5.5V
• I²C^TM Interface:
- Eight Available Addresses
- Standard (100 kbps), Fast (400 kbps), and
High-Speed (3.4 Mbps) Modes
• Small 6-lead SOT-23 Package
• Extended Temperature Range: -40°C to +125°C
Applications
• Set Point or Offset Trimming
• Sensor Calibration
• Closed-Loop Servo Control
• Low Power Portable Instrumentation
• PC Peripherals
• Data Acquisition Systems
Block Diagram
A0 SCL SDA
V_DD
Power-on
Reset
I²C Interface Logic
Charge
Pump
Input
Register
EEPROM
DAC Register
Resistive
String DAC
Op
V_SS
Amp
DESCRIPTION
The MCP4725 is a low-power, high accuracy, single
channel, 12-bit buffered voltage output Digital-to-Ana-
log 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 and configuration data can be
programmed to the non-volatile memory (EEPROM) by
the user using I²C interface command. The non-volatile
memory feature enables the DAC device to hold the
DAC input code during power-off time, and the DAC
output is available immediately after power-up. This
feature is very useful when the DAC device is used as
a supporting device for other devices in the network.
The 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
DAC reference is driven from VDD directly. In
power-down mode, the output amplifier can be config-
ured to present a low, medium, or high resistance out-
put load.
The MCP4725 has an external A0 address pin. This A0
pin can be tied to VDD or VSS of the user’s application
board.
The MCP4725 has a two-wire I²C™ compatible serial
interface for standard (100 kHz), fast (400 kHz), or high
speed (3.4 MHz) mode.
The MCP4725 is an ideal DAC device where design
simplicity and small footprint is desired, and for applica-
tions requiring the DAC device settings to be saved
during power-off time.
The device is available in a small 6-pin SOT-23
package.
Package Type
SOT-23-6
V_{OUT 1}
V_SS 2
V_DD ³
6 A0
5 _SCL
4 _SDA
V_OUT
© 2007 Microchip Technology Inc.
DS22039C-page 1