Separate AGND & DGND Through Reverse Engineering Circuit Board Note also that many ADCs and DACs have separate analog ground (AGND) and digital ground (DGND) pins through Reverse Engineering Circuit Board. On the device data sheets, users are often advised to connect these pins together at the package. This seems to conflict with the advice to connect…
Restore PCB Board to Separate Analog and Digital Grounds As a fact of life, digital circuitry is noisy. Saturating logic, such as TTL and CMOS, draws large, fast current spikes from its supply during switching. However, logic stages, with hundreds of millivolts (or more) of noise immunity, usually have little need for high levels of…
Mixed Signal PCB Reverse Engineering To further complicate the issue, Reverse Engineering Mixed Signal PCB can find that mixed-signal ICs have both analog and digital ports, and because of this, much confusion has resulted with respect to proper grounding techniques. In addition, some mixed-signal ICs have relatively low digital currents, while others have high digital…