LH0091

`  Low cost
`  True rms conversion
` 0.5% of reading accuracy untrimmed
`  0.05% of reading accuracy with external trim
`  Minimum component count
`  Input voltage to ±15V peak for VS=±15V
`  Uncommitted amplifier for filtering, gain, or high crest factor configuration
`  Military or commercial temperature range.

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications.
Supply Voltage. . . . . . . . . . . .. . . . . .. . . . . .±22V
Input Voltage . . .. . . . . .. . . . . .. . . . . .±15V peak
Output Short Circuit Duration. . . . . . Continuous
Operating Temperature Range
TMIN TMAX
LH0091C -25 85
Storage Temperature Range
LH0091C -25 to +85
Lead Temp. (Soldering, 10 seconds) . . . . . .260

The LH0091, rms to dc converter generates a dc output equal to the rms value of any input per the transfer function:

The LH0091 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 ranges i.e., 10 mV100 mV, 0.7V7V, etc.