LH0091 Datasheet, PDF (1/6 Pages) National Semiconductor (TI) – LH0091 True RMS to DC Converter

September 1993
LH0091 True RMS to DC Converter
General Description
The LH0091 rms to dc converter generates a dc output
equal to the rms value of any input per the transfer function
0 _ ^{EOUT(DC) e}
1
T
T
E_IN2(t) dt
0
The device provides rms conversion to an accuracy of 0 1%
of reading using the external trim procedure It is possible to
trim for maximum accuracy (0 5 mVg0 05% typ) for decade
x x ranges i e 10 mV 100 mV 0 7V 7V etc
Features
Y _{Low cost}
Y _{True rms conversion}
Y _{0 5% of reading accuracy untrimmed}
Y _{0 05% of reading accuracy with external trim}
Y _{Minimum component count}
Y _{Input voltage to} g_{15V peak for VS}e g_15V
Y _{Uncommitted amplifier for filtering gain or high crest}
factor configuration
Y _{Military or commercial temperature range}
Block and Connection Diagrams
Dual-In-Line Package
Dual-In-Line Package
Order Number LH0091CD
See Package D16D
Simplified Schematic
TL H 5694 – 1
Note Dotted lines denote external connections
C1995 National Semiconductor Corporation TL H 5694
TL H 5694 – 2
RRD-B30M115 Printed in U S A