BOB-12918 SparkFun

MCP4725 12-Bit Digital-to-Analog Converter with EEPROM Memory in SOT-23-6 Features DESCRIPTION 12-Bit Resolution The MCP4725 is a low-power, high accuracy, single On-Board Non-Volatile Memory (EEPROM) channel, 12-bit buffered voltage output Digital-to- Analog Convertor (DAC) with non-volatile memory 0.2 LSB DNL (typical) (EEPROM). Its on-board precision output amplifier External A0 Address Pin allows it to achieve rail-to-rail analog output swing. Normal or Power-Down Mode The DAC input and configuration data can be Fast Settling Time: 6 s (typical) programmed to the non-volatile memory (EEPROM) by External Voltage Reference (V ) 2 DD the user using I C interface command. The non-volatile Rail-to-Rail Output memory feature enables the DAC device to hold the Low Power Consumption DAC input code during power-off time, and the DAC output is available immediately after power-up. This Single-Supply Operation: 2.7V to 5.5V 2 TM feature is very useful when the DAC device is used as I C Interface: a supporting device for other devices in the network. - Eight Available Addresses The device includes a Power-On-Reset (POR) circuit to - Standard (100 kbps), Fast (400 kbps), and ensure reliable power-up and an on-board charge High-Speed (3.4 Mbps) Modes pump for the EEPROM programming voltage. The Small 6-lead SOT-23 Package directly. In power- DAC reference is driven from V DD Extended Temperature Range: -40C to +125C down mode, the output amplifier can be configured to present a known low, medium, or high resistance Applications output load. Set Point or Offset Trimming The MCP4725 has an external A0 address bit selection pin. This A0 pin can be tied to V or V of the users Sensor Calibration DD SS application board. Closed-Loop Servo Control 2 Low Power Portable Instrumentation The MCP4725 has a two-wire I C compatible serial interface for standard (100 kHz), fast (400 kHz), or high PC Peripherals speed (3.4 MHz) mode. Data Acquisition Systems The MCP4725 is an ideal DAC device where design Block Diagram simplicity and small footprint is desired, and for applications requiring the DAC device settings to be A0 SCL SDA saved during power-off time. The device is available in a small 6-pin SOT-23 Power-on V 2 package. DD I C Interface Logic Reset Package Type Charge Input Pump Register SOT-23-6 DAC Register EEPROM V OUT 6 A0 1 Resistive MCP4725 5 V 2 SCL SS String DAC 3 4 V SDA DD Op V Amp SS V OUT 2009 Microchip Technology Inc. DS22039D-page 1 Power-down ControlMCP4725 NOTES: DS22039D-page 2 2009 Microchip Technology Inc.