PRECISION MICROPWR RMD TO DC CONVERTER
LTC1966CMS8
LTC1966 - Precision Micropower, Delta Sigma RMS-to-DC Converter
Features
No-Hassle Simplicity:
True RMS-DC Conversion with Only One External Capacitor
Delta Sigma Conversion 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 1VPEAK Differential Voltage
Flexible Output:
Rail-to-Rail Output
Separate Output Reference Pin Allows Level Shifting
Small Size:
Space Saving 8-Pin MSOP Package
Description
The LTC®1966 is a true RMS-to-DC converter that utilizes an innovative patented Delta Sigma 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.
The LTC1966 also has a rail-to-rail output with a separate output reference pin providing flexible level shifting. The LTC1966 operates on a single power supply from 2.7V to 5.5V or dual supplies up to ±5.5V. A low power shutdown mode reduces supply current to 0.5µA.
The LTC1966 is insensitive to PC board soldering and stresses, as well as operating temperature. The LTC1966 is packaged in the space-saving MSOP package which is ideal for portable applications.
Applications
True RMS Digital Multimeters and Panel Meters
True RMS AC + DC Measurements