Description:
The LTC1966 is a true RMS-to-DC converter that utilizes an innovative patented ∆Σ 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.
The LTC1966 accepts single-ended or differential input signals (for EMI/RFI rejection) and supports crest factors up to 4. Common mode input range is rail-to-rail. Differential input range is 1VPEAK, and offers unprecedented linearity. Unlike previously available RMS-to-DC converters, the superior linearity of the LTC1966 allows hassle free system calibration at any input voltage.
Application:
True RMS Digital Multimeters
Panel Meters
True RMS AC + DC Measurements
Features:
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 1V PEAK 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