This is essentially the mathematical version of the previous article; I prefer a more serious approach.Review of ADC Encoding Principles: The digital output of an ADC (ignoring quantization error) is: Where: Vin: Input signal voltage; Vref: Reference voltage; N: Number of bits of the ADC; Introducing Reference Voltage Noise Assume: Ideal reference voltage: Actual reference … Read more
This article is the second in a series discussing peripheral modules of microcontrollers, focusing on how to improve ADC conversion accuracy.In this article, I will summarize the understanding of the reference voltage for ADCs, which many engineers are not very clear about, especially in scenarios where the ADC is used with a battery directly powering … Read more
Regarding the reference voltage of the ADC, I have found that many engineers do not have a clear understanding. This is especially true in scenarios where the battery directly powers the MCU and the ADC is used. This article provides a brief summary. Taking the classic STM32F103 as an example, the reference voltage for the … Read more
Suddenly got stuck, what did I learn? Let me ask you, what is the maximum input conversion range of an ADC? (You can answer that in your mind, I can’t hear you), suddenly I was lost, what is it? This is the problem that this short article addresses.The ADC converts the input analog signal into … Read more
Introduction This article covers the following topics: What is the difference between Single-Ended Input and Differential Input? What are Fully Differential, True Differential, and Floating Differential? What are Reference Voltage (Vref) and Common Mode Voltage (Vcm)? Single-Ended Input The simplest connection between a sensor and an ADC is the Single-Ended Input. In this connection, the … Read more