10.1 Layout Guidelines

A precision analog component requires careful layout, adequate bypassing, and clean, well-regulated power supplies. The DAC7551-Q1 device offers single-supply operation, and is often used in close proximity with digital logic, microcontrollers, microprocessors, digital signal processors, or a combination. The more digital logic present in the design and the higher the switching speed, the more difficult it is to prevent digital noise from appearing at the output. As a result of the single ground pin of the DAC7551-Q1 device, all return currents (including digital and analog return currents for the DAC) must flow through a single point. Ideally, the GND should be connected directly to an analog ground plane. This plane should be separate from the ground connection for the digital components until these components were connected at the power-entry point of the system.

10.2 Layout Example

Figure 32. DAC7551-Q1 Layout Example