Product category: Analogue and Mixed Signal ICs
News Release from: Linear Technology Corp | Subject: LTC1967 and LTC1968
Edited by the Electronicstalk Editorial Team on 26 January 2005
Convertors bring accuracy to AC
measurement
Two new true RMS-to-DC conversion ICs claim new standards for accuracy, linearity and size.
Linear Technology has two new true RMS-to-DC conversion ICs it claims set new standards for accuracy, linearity and size The LTC1967 and the wider bandwidth LTC1968 are simple to use and meet the requirements of a broad range of AC voltage and current measurement applications
This article was originally published on Electronicstalk on 28 Jul 2004 at 8.00am (UK)
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True RMS (root mean square) is the most accurate means of measuring the energy of an AC signal, regardless of the waveform shape.
Linear Technology's newly expanded line of delta-sigma true RMS-DC convertors require only one external capacitor and are accurate to +/- 1% over bandwidth of 500kHz.
With 0.02% linearity, there is no need for in-system calibration.
This high precision is maintained over a wide range of input signal levels, giving these devices unmatched linearity and accuracy - guaranteed over the full industrial temperature range.
The delta-sigma computational technique is inherently immune from changes due to temperature, time and PCB stress.
Product marketing manager Erik Soule comments: "The delta sigma technique changes the way system designers approach AC measurements".
"These new devices enable solutions that are simpler, smaller and more accurate, and also eliminate in-system calibration".
The rail-to-rail inputs can be driven either single-ended or differentially, providing excellent noise rejection.
In addition, the rail-to-rail outputs feature a separate output reference pin for flexible level shifting.
Both products are in full production.
The LTC1967 and LTC1968 are priced at $3.40 and $3.95, respectively, in 1000-piece quantities. Request a free brochure from Linear Technology Corp ...
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