The LTC1968CMS8 is a true RMS-to-DC converter that uses an innovative delta-sigma computational technique. The benefits of the LTC1968CMS8 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.
The LTC1968CMS8 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. The LTC1968CMS8 allows hassle-free system calibration at any input voltage.
The LTC1968CMS8 has a rail-to-rail output with a separate output reference pin providing flexible level shifting; it operates on a single power supply from 4.5V to 5.5V. A low power shutdown mode reduces supply current to 0.1µA.
The LTC1968CMS8 is packaged in the space-saving MSOP package, which is ideal for portable applications.
Feature
- 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
(Picture: Pinout)
