LTC1966 Application Note

●The LTC1966IMS8#PBF is a true RMS-to-DC Converter that utilizes an innovative patented ∆Σ computational technique. The internal delta sigma circuitry of the converter makes it simpler to use, more accurate, lower power and dramatically more flexible than conventional log antilog RMS-to-DC converter. This accepts single-ended or differential input signals (for EMI/RFI rejection) and supports crest factors up to 4. Common mode input range is rail-to-rail. Differential input range is 1V peak and offers unprecedented linearity. Unlike previously available RMS-to-DC converter, the superior linearity of this allows hassle free system calibration at any input voltage. This also has a rail-to-rail output with a separate output reference pin providing flexible level shifting. It operates on a single power supply from 2.7 to 5.5V or dual supplies up to ±5.5V. A low power shutdown mode reduces supply current to 0.5µA.

● Simple to use, requires one capacitor

● True RMS DC conversion using ∆Σ technology

● High accuracy

● High linearity

● Low supply current

● 0.1µA Ultralow shutdown current

● Differential or single-ended and rail-to-rail common mode voltage range flexible input

● Rail-to-rail flexible output

●ESD sensitive device, take proper precaution while handling the device.