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مستندات:
دیتا شیت LTC1966CMS8-IC
Description:
The
LTC®1966 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. 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.
LTC1966CMS8 RMS to DC Converter application:
True RMS Digital Multi-meters and Panel Meters
True RMS AC + DC Measurements
Features:
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
Ultralow Shutdown Current
Constant Bandwidth: Independent of Input Voltage 800kHz –3dB, 6kHz ±1%
Flexible Supplies:
Low Supply Current: 155µA Typ, 170µA Max
2.7V to 5.5V Single Supply
Up to ±5.5V Dual Supply
Input Currents: ±10mA
Output Current: ±10mA
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 n Wide Temperature Range: –55°C to 125°C
Small Size: Space Saving 8-Pin MSOP Package