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AD536

Analog Devices
Part Number AD536
Manufacturer Analog Devices
Description Integrated Circuit True RMS-to-DC Converter
Published Mar 23, 2005
Detailed Description a FEATURES True RMS-to-DC Conversion Laser-Trimmed to High Accuracy 0.2% Max Error (AD536AK) 0.5% Max Error (AD536AJ) Wi...
Datasheet PDF File AD536 PDF File

AD536
AD536

Overview
a FEATURES True RMS-to-DC Conversion Laser-Trimmed to High Accuracy 0.
2% Max Error (AD536AK) 0.
5% Max Error (AD536AJ) Wide Response Capability: Computes RMS of AC and DC Signals 450 kHz Bandwidth: V rms > 100 mV 2 MHz Bandwidth: V rms > 1 V Signal Crest Factor of 7 for 1% Error dB Output with 60 dB Range Low Power: 1.
2 mA Quiescent Current Single or Dual Supply Operation Monolithic Integrated Circuit –55؇ C to +125؇ C Operation (AD536AS) PRODUCT DESCRIPTION VIN 1 Integrated Circuit True RMS-to-DC Converter AD536A PIN CONFIGURATIONS AND FUNCTIONAL BLOCK DIAGRAMS TO-100 (H-10A) TO-116 (D-14) and Package Q-14 Package IOUT ABSOLUTE VALUE 14 13 12 11 CURRENT MIRROR 25k⍀ BUF 25k⍀ 10 9 8 +VS NC NC NC COM RL IOUT +VS COM NC 2 AD536A –VS 3 CAV 4 dB 5 BUF OUT 6 BUF 7 IN SQUARER DIVIDER RL 25k⍀ BUF IN 25k⍀ AD536A CURRENT MIRROR BUF BUF OUT SQUARER DIVIDER ABSOLUTE VALUE dB VIN –VS CAV NC = NO CONNECT LCC (E-20A) Package NC VIN NC +VS NC 3 2 1 20 19 18 17 16 25k⍀ CURRENT MIRROR 25k⍀ 11 12 13 15 14 ABSOLUTE VALUE The AD536A is a complete monolithic integrated circuit which performs true rms-to-dc conversion.
It offers performance which is comparable or superior to that of hybrid or modular units costing much more.
The AD536A directly computes the true rms value of any complex input waveform containing ac and dc components.
It has a crest factor compensation scheme which allows measurements with 1% error at crest factors up to 7.
The wide bandwidth of the device extends the measurement capability to 300 kHz with 3 dB error for signal levels above 100 mV.
An important feature of the AD536A not previously available in rms converters is an auxiliary dB output.
The logarithm of the rms output signal is brought out to a separate pin to allow the dB conversion, with a useful dynamic range of 60 dB.
Using an externally supplied reference current, the 0 dB level can be conveniently set by the user to correspond to any input level from 0.
1 to 2 volts rms.
The AD536A is lase...


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