Details

• The LTC1966 is a true RMS-to-DC converter Module.
• The internal delta-sigma circuitry to use,more accurate, lower power and dramatically more flexible than conventional log-antilog RMS-to-DCconverl ers.
• The LTC1966 accepts single ended or differential inputsignals (for EM/RFI rejection) and supports crest factors up to 4.
• Common mode input range is rail-to-rail. Differ-ential input range is 1VpEAK, and offers unprecedented lin-earity. Unlike previouslyavailable RMS-to-DCconverters, the superior linearity of the LTC1966 allows hassle-free system calibration at any input voltage.
• The LTC1966 also has a rail-to-rail output with a separateoutput reference pin providing flexible levei shitting.
• The LTC1966 operates on a single power supply from 2.7V to 5.5V or dual supplies up to 5.5V. Alow power shut down mode reduces supply current to 0.5uA.
• The LTC1966 is insensitive to PC board soldering andstresses, as well as operating temperature.

• No-Hassle Simplicity:
• True RMS-DC Conversion with Only One External Capacitor
• 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: 155uA Typ,170uA Max
• Ultralow Shutdown Current: 0.1yA
• 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