Nowadays, information of electronic devices can only be processed by the digital field, but analog signals are still an essential part of the game. The “smart world” we live in uses sensors and devices can choose from a range of different inputs. That is why the designers’ challenge is focused on understanding what is the best key and what parameters are important. To meet our information requirements, data must be fast and accurate. Advances in sensing technology, particularly in terms of miniaturization, are helping to increase the availability of simple, cost-effective sensing. In fact, in addition to being a useful improvement in many controllers, sensing environmental attributes such as temperature, humidity, brightness, etc. is an increasingly common feature in many consumer applications. In complex electronic systems, the result has been a huge rise in the number of analog signals that must be processed. Wherever physical properties are sensed or measured, the resulting primary electrical signal has a constant voltage level within specified limits. This then needs to be converted into a digital signal that can then be processed by the system. In most applications, analog-to-digital (AD) conversion is done with signals operating at moderate frequencies. An analog switch can be used to expand the number of channels and switch between them to allow the switch to handle a channel over a given time slice. Therefore, for high-performance systems, different parameters of both the AD converter and the analog switch must be considered. Basic principles In most data transformation applications, precision and accuracy are very important parameters. The precision is determined by the number of bits, so 10 bits results in 210 or 1024 different numeric levels. Accuracy is the deviation of the sample level due to an error source such as a voltage drop in the signal path or a disturbing side channel effect that changes the voltage level of the signal. It is therefore essential to have good signal integrity for accurate AD conversion. AD conversion principle Of course, this applies not only to the transformer, but any transformer in front of the transformer. The converter can meet signal integrity requirements if the ohmic is low enough to allow high accuracy. However, it must also have a lower capacitance to keep the switching of transients under control. Unfortunately, achieving lower ohmic characteristics comes at the cost of increased capacitance. So, getting the right balance is key. Analog multiplier with AD converter In certain cases the input voltage of an unspecified channel can be increased, even above the switch’s VCC level, perhaps only for a short period of time. In a standard design design, this increased input voltage will also affect the output voltage as it raises the output level across the VCC. Please visit the original link for the full article by Christian Backhaus, Director of App Marketing at Nexperia.