资 源 简 介
Delta-Sigma (DS) Analog-to-Digital Converters are well knownfor their innate ability to resolve an analog input signal to verysmall LSB voltage ranges. The primarily applications for thistype of product is in the Industrial Process Control market suchas direct transducer interface for pressure, temperature, flow,weigh scales and force measurement systems. In the Instrumentationmarket, the DS converter is particularly well-suited forportable applications, such as thermometers, gas analyzers andblood analyzers. At first glance, high resolution doesn’t seem tobe an important specification for these types of applications. Tothe contrary, close inspection of these transducer interfacecircuits divulge a different story. The sensing element’s outputcould be a fairly high voltage (hundreds of mV to several volts),however, the delta output voltages that represent a change intemperature, pressure, light, etc., is usually extremely low, submVor mV.
