TLC549IDG – TEXAS INSTRUMENTS

The Texas Instruments TLC549IDG is a 16-bit, current-sinking digital-to-analog converter (DAC) designed for driving LED segments or other current-based loads. It operates from a single 2.7V to 5.5V supply voltage and features a serial interface compatible with SPI and other similar protocols. Each of its 16 outputs can sink up to 60mA, allowing for high-brightness LED displays. The device boasts an internal 10-bit DAC per output, providing 1024 discrete current levels for exceptional brightness control and grayscale capabilities. This is achieved without the need for external components, simplifying design and reducing board space. Packaged in a space-saving 20-pin TSSOP (Thin Small Outline Package), the TLC549IDG includes internal current limiting resistors, eliminating the need for external current-setting components. Its advantages lie in its high current-sinking capacity, integrated current limiting, and compact package, making it ideal for applications requiring high-resolution, high-brightness LED displays, such as automotive instrument panels, portable displays, or high-density signage where precision current control is paramount. The device’s serial interface also minimizes the number of microcontroller pins required for control, further enhancing design efficiency.