Service Manuals, User Guides, Schematic Diagrams or docs for : Keithley 2001 ds AD637

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                                                                                                                         High Precision, Wideband
                                                                                                                             RMS-to-DC Converter
                                                                                                                                           AD637
FEATURES                                                                                                                  FUNCTIONAL BLOCK DIAGRAM
High accuracy
  0.02% maximum nonlinearity, 0 V to 2 V rms input                                                             BUFF IN
                                                                                                                                                                         BUFF
  0.10% additional error to crest factor of 3                                                                                                                            OUT
Wide bandwidth
                                                                                                                                                          25k
  8 MHz at 2 V rms input                                                                                                                                                 RMS OUT
                                                                                                                   VIN     ABSOLUTE      SQUARER/
  600 kHz at 100 mV rms                                                                                                     VALUE         DIVIDER

Computes
  True rms
                                                                                                                          25k                                            CAV
  Square                                                                                                    DEN INPUT
  Mean square                                                                                                                                                            dB OUTPUT

  Absolute value
                                                                                                              OUTPUT
dB output (60 dB range)                                                                                       OFFSET
                                                                                                                                           BIAS
Chip select/power-down feature allows                                                                        COMMON
  Analog three-state operation




                                                                                                                                                                         00788-001
                                                                                                                                                             AD637
                                                                                                                   CS
  Quiescent current reduction from 2.2 mA to 350 A
14-lead SBDIP, 14-lead low cost CERDIP, and 16-lead SOIC_W                                                                                 Figure 1.


GENERAL DESCRIPTION
The AD637 is a complete, high accuracy, monolithic rms-to-dc                                                The input circuitry of the AD637 is protected from overload
converter that computes the true rms value of any complex                                                   voltages in excess of the supply levels. The inputs are not
waveform. It offers performance that is unprecedented in                                                    damaged by input signals if the supply voltages are lost.
integrated circuit rms-to-dc converters and comparable to
discrete and modular techniques in accuracy, bandwidth, and                                                 The AD637 is available in accuracy Grade J and Grade K for
dynamic range. A crest factor compensation scheme in the                                                    commercial temperature range (0

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