re literature. Some sensors produce outputs in the range of milliVolts. If you’re to sample and convert the signal in its original range, you’ll have a limited range of digital values to operate with. Instead, use an operational amplifier to scale up the signal to the maximum range supported by the ADC.
4. Analog Signal Clearance
If you’re in need of quiet space to finish up your favorite dystopian novel and your neighbor is blaring the music away, you’ll end up getting frustrated. The same happens when you place a high-speed signal adjacent to the analog signal. In a phenomenon called electromagnetic interference (EMI), the analog signal will be interfered by noise.
Reduce noise coupling by maintaining PCB trace clearance.
The next time you’re routing an analog signal, ensure that it is protected by a block of an analog ground plane and keep noisy signals away from it. You’ll also want to hold two or more analog signals from each other to maintain signal integrity.
With readily available SPICE models for your ADC or DACs, designers can simulate before going into layout. Depicting conversion accuracy, acquisition times, and utilizing multiple models to compare output waveforms are all functions of your SPICE simulation which will add to the security of your design before wasting time and energy encountering these problems during PCB layout, or worse, production.
Knowing the fundamentals for your circuit design will help you move forward in ways that you previously couldn’t imagine, just like having EDA software that works with you and is capable of the analysis, layout, and simulation you need. Work through the potential for your board with strong mixed-signal simulation considerations with Cadence.
If you’re looking to learn more about how Cadence has the solution for you, talk to us and our team of experts.
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