Linear Technology's LTC1966CMS8 Precision RMS-to-DC Converter

The LTC1966CMS8 is a highly accurate and versatile RMS-to-DC converter from Linear Technology, now part of Analog Devices, designed to provide precision measurement of alternating current (AC) signals. This integrated circuit (IC) offers a true root mean square (RMS) output for waveform-independent signal processing, which is essential for accurate and reliable measurement of complex signals, including sine waves, square waves, triangular waves, and even irregular shapes.

Encased in an 8-lead MSOP package, the LTC1966CMS8 is particularly well-suited for space-constrained applications where precision is paramount. Its small form factor belies its robust capabilities, making it an ideal choice for a wide range of applications such as industrial control systems, battery chargers, wireless transceivers, power management systems, and test equipment.

One of the standout features of the LTC1966CMS8 is its ease of use. It requires no external calibration or trimming to achieve high accuracy. The device operates over a wide supply voltage range from 2.7V to 5.5V, making it adaptable to various power environments. Additionally, it boasts a wide input dynamic range and can measure signals from 50µV RMS to 1V RMS with a single-ended input, or up to 2V RMS with a differential input, without the need for an input attenuator.

The precision of the LTC1966CMS8 is further highlighted by its low input offset voltage and excellent linearity. Its temperature stability ensures consistent performance over the entire operating temperature range. Furthermore, the device features a fast settling time, typically around 1ms to 0.1% for most input waveforms, allowing for rapid signal processing and real-time monitoring.

For designers and engineers looking to integrate RMS-to-DC conversion into their systems, the LTC1966CMS8 provides a reliable and straightforward solution. Its combination of high precision, compact packaging, and ease of use makes it a valuable component in the design of sophisticated electronic systems where accurate signal measurement is critical.