LTC1968 - Precision Wide Bandwidth, RMS-to-DC Converter

Linear Technologies

LTC1968 - Precision Wide Bandwidth, RMS-to-DC Converter RSS Sample
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Linear Technology
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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.

* High Linearity:

0.02% Linearity Allows Simple System Calibration * Wide Input Bandwidth:

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 Capacitor

Delta Sigma Conversion Technology * Ultralow Shutdown Current:

0.1µA * 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

Designed for Automotive and Transportation Applications AEC-Q100 generic family data available for specific packages

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