Catalog
Precision Wide Bandwidth, RMS-to-DC Converter
Key Features
• High Linearity:0.02% Linearity Allows Simple System Calibration
• 0.02% Linearity Allows Simple System Calibration
• Wide Input Bandwidth:Bandwidth to 1% Additional Gain Error: 500kHzBandwidth to 0.1% Additional Gain Error: 150kHz3dB Bandwidth Independent of Input Voltage Amplitude
• 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 CapacitorDelta Sigma Conversion Technology
• True RMS-DC Conversion with Only One External Capacitor
• Delta Sigma Conversion Technology
• Ultralow Shutdown Current:0.1µA
• 0.1µA
• Flexible Inputs:Differential or Single EndedRail-to-Rail Common Mode Voltage RangeUp to 1VPEAKDifferential Voltage
• Differential or Single Ended
• Rail-to-Rail Common Mode Voltage Range
• Up to 1VPEAKDifferential Voltage
• Flexible Output:Rail-to-Rail OutputSeparate Output Reference Pin Allows Level Shifting
• Rail-to-Rail Output
• Separate Output Reference Pin Allows Level Shifting
• Small Size:Space Saving 8-Pin MSOP Package
• Space Saving 8-Pin MSOP Package
Description
AI
The LTC1968 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.The LTC1968 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 LTC1968 allows hassle-free system calibration at any input voltage.The LTC1968 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 LTC1968 is packaged in the space-saving MSOP package, which is ideal for portable applications.ApplicationsTrue RMS Digital Multimeters and Panel MetersTrue RMS AC + DC Measurements