DESCRIPTION
The LTC®1968 is a true RMS-to-DC converter that uses an innovative delta-sigma computational technique. The benefits of the LTC1968 proprietary architecture, when compared to conventional log-antilog RMS-to-DC converters, are higher linearity and accuracy, bandwidth independent of amplitude and improved temperature behavior.

FEATURES
■ High Linearity:
0.02% Linearity Allows Simple System Calibration
■ Wide Input Bandwidth:
Bandwidth to 1% Additional Gain Error: 500kHz
Bandwidth to 0.1% Additional Gain Error: 150kHz
3dB Bandwidth Independent of Input Voltage
Amplitude
■ No-Hassle Simplicity:
True RMS-DC Conversion with Only One External
Capacitor
Delta Sigma Conversion Technology
■ Ultralow Shutdown Current:
0.1µA
■ Flexible Inputs:
Differential or Single Ended
Rail-to-Rail Common Mode Voltage Range
Up to 1VPEAK Differential Voltage
■ Flexible Output:
Rail-to-Rail Output
Separate Output Reference Pin Allows Level Shifting
■ Small Size:
Space Saving 8-Pin MSOP Package

APPLICATIONS
■ True RMS Digital Multimeters and Panel Meters
■ True RMS AC + DC Measurements