DescripTion
The LTC®1966 is a true RMS-to-DC converter that utilizes an innovative patented DS computational technique. The internal delta sigma circuitry of the LTC1966 makes it simpler to use, more accurate, lower power and dramatically more flexible than conventional log antilog RMS-to-DC converters.

FEATURES
■ Simple to Use, Requires One Capacitor
■ True RMS DC Conversion Using DS Technology
■ High Accuracy:
   0.1% Gain Accuracy from 50Hz to 1kHz
   0.25% Total Error from 50Hz to 1kHz
■ High Linearity:
   0.02% Linearity Allows Simple System Calibration
■ Low Supply Current:
   155µA Typ, 170µA Max
■ Ultralow Shutdown Current:
   0.1µA
■ Constant Bandwidth:
   Independent of Input Voltage
   800kHz –3dB, 6kHz ±1%
■ Flexible Supplies:
   2.7V to 5.5V Single Supply
   Up to ±5.5V Dual Supply
■ 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
■ Wide Temperature Range:
   –55°C to 125°C
■ Small Size:
   Space Saving 8-Pin MSOP Package

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