Microchip MCP4728A0T-E/UN: A 12-Bit Quad Channel DAC with I²C Interface and On-Board EEPROM

In the realm of digital-to-analog conversion, the need for precision, integration, and ease of use is paramount. The Microchip MCP4728A0T-E/UN stands out as a sophisticated solution, combining a 12-bit quad channel DAC, an I²C interface, and critical on-board EEPROM memory into a single, compact package. This device is engineered to provide highly accurate analog outputs for a wide array of applications, from industrial automation and test equipment to audio processing and programmable voltage sources.

At its core, the MCP4728 features four independent 12-bit voltage-output DACs. This quad-channel architecture is a significant advantage, enabling control over multiple analog signals from a single IC. This not only saves valuable board space but also simplifies system design and reduces overall component count. The 12-bit resolution ensures fine granularity and precise control over the output voltage, yielding a high level of accuracy essential for demanding applications.

A key feature of this DAC is its integrated I²C serial interface. This industry-standard two-wire interface allows for communication with a host microcontroller (MCU) using only two pins, facilitating easy integration into virtually any embedded system. The interface supports standard (100 kHz), fast (400 kHz), and high-speed (3.4 MHz) modes, providing flexibility for different speed requirements. Each device can also be addressed by one of four unique I²C addresses, allowing up to four MCP4728s to coexist on the same bus for a total of 16 independent DAC channels.

Perhaps one of its most distinguishing features is the inclusion of on-board non-volatile EEPROM memory. This allows each DAC channel's configuration—including its output voltage value and gain setting—to be stored and retained even when power is completely removed. Upon power-up, the device can automatically reload these saved settings, enabling the system to resume operation immediately without waiting for initialization commands from the MCU. This power-on recall capability is invaluable for systems that require a known state at startup.

The MCP4728 offers several operational modes for flexibility. The DAC registers can be updated immediately or synchronized with an internal or external LDAC pin for simultaneous output updates across all channels. Its output amplifiers provide a rail-to-rail output, ensuring a wide dynamic range. The device operates from a single 2.7V to 5.5V supply, making it suitable for both 3.3V and 5V systems.

Housed in a space-efficient 10-lead MSOP package, the MCP4728A0T-E/UN is designed for performance and reliability. Its combination of high resolution, multiple channels, convenient serial interface, and non-volatile memory makes it an exceptionally versatile and powerful component for designers seeking to enhance their system's analog capabilities.

ICGOODFIND: The Microchip MCP4728A0T-E/UN is a highly integrated and intelligent quad DAC. Its fusion of four precise 12-bit channels, a simple I²C interface, and the crucial on-board EEPROM for storing settings provides a complete, space-saving analog output solution that simplifies design and ensures reliable operation upon power-up.

Keywords:

12-Bit DAC

Quad Channel

I²C Interface

On-Board EEPROM

Power-On Recall