Howtosignalprocessing
- What is Delta-Sigma in ADC?
- What's the difference between SAR and Delta-Sigma ADCs?
- How do Delta-Sigma ADCs work part 3?
- What is the resolution of an ADC with Sigma Delta structure?
What is Delta-Sigma in ADC?
The design of delta-sigma (∆Σ) analog-to- digital converters (ADCs) is approximately three-quarters digital and one-quarter analog. ∆Σ ADCs are now ideal for converting analog signals over a wide range of frequencies, from DC to several megahertz.
What's the difference between SAR and Delta-Sigma ADCs?
SAR ADCs will have zero-cycle latency, a low latency time, are highly accurate, can be low in power use, and are easier to use than Sigma Delta ADCs. SARS, however, can have lower maximum sample rates. Pipeline ADCs have even faster conversion rates than SAR ADCs, and SARs are faster than Sigma-Deltas.
How do Delta-Sigma ADCs work part 3?
Following the modulator in the delta-sigma ADC is a digital/decimator circuit. This circuit samples and filters the modulator stream of 1-bit codes. At the modulator output, high-frequency noise and high-speed sample rates are problems.
What is the resolution of an ADC with Sigma Delta structure?
Sigma-delta ADCs typically have 16 to 24-bit resolution, with a usable input signal frequency range of a few Hz to a few kHz. There are some 16-bit sigma-delta ADCs with conversion rates up to 1 MSPS.
