ADI LTC1968IMS8#PBF

A true RMS-to-DC converter that uses an innovative delta-sigma computational technique. The benefits of the 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. Operates with single-ended or differential input signals and accurately supports crest factors up to 4. Common mode input range is rail-to-rail. Differential input range is 1VPEAK, and offers unprecedented linearity. Allows hassle-free system calibration at any input voltage. Has a rail-to-rail output with a separate output reference pin providing flexible level shifting; operates on a single power supply from 4.5V to 5.5V. A low power shutdown mode reduces supply current to 0.1μA. Is packaged in the space-saving MSOP package, which is ideal for portable applications.

• 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

• True RMS Digital Multimeters and Panel Meters
• True RMS A0+D0 Measurements