ad2033 Analog Devices, Inc., ad2033 Datasheet

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ad2033

Manufacturer Part Number
ad2033
Description
Truerms /db M.ultirange,~meter.
Manufacturer
Analog Devices, Inc.
Datasheet
[
I]
The AD2033 is a 3~ digit, LED display, line-powered digital
The input of the AD203 3 is dc coupled and therefore accepts
GENERAL DESCRIPTION
panel meter (DPM) that measures dc and ac inpu t signals. The
AD2033 measures either the true rms value of ac+dc signals
or the dB value of the ac+dc inpu ts.
to measure an ac signal riding on a constant dc voltage, as in
measuring the ripple of a dc power supply.
ac and/or dc inputs. The input can be ac coupled if it is desired
TRUErmsMEASUREMENTS
rectified average of ac input signals, the AD2033 uses im-
plicit compu ting techniques to derive the actual rms value
not depend on input waveforms. Pulse trains, triangular
pulses and SCR chopped sinewaves, even with high crest
Unlike most ac meters which display rms but measure the
of the ac signals. Thus, the accuracy of the AD2033 does
factors (ratio of peak to rms) and pure sinewaves, are all
measured with high accuracy and no recalibration over a
wide frequency range.
dB MEASUREMENTS
dB measurements
external references (including standard ImW /600S1 used in
audio measurements).
the measurements
from +5mV to +5V. With internal reference, the voltage
can be adjusted via a built-in reference adjust pot. dB
measurements
,Accurate True rms Measurement of Complex ac or ac+dc
True
dB Measurements
tfigh
FEATURES
Bipolar dc Measurements
Full Floating Input Isolation...
Parallel BCD 'Data Outputs
Five Input Ranges
3%
Large 0.5" (13mm) LED Displays
Line Powered
In,dustry Standard Case Design
AfPLlCATIONS
Decibel Oisplay of ac or ac+dc Inputs
For Use in Test Equipment, Power Controllers, Process
Waveforms
Control Equipment and Analytical and Scientific
Instruments
Digits
rlns
Accuracy/wide Frequency Response
a~~~~~
Measurement
can also be made against an arbitrary external
can be made with respect to internal or
are made with regard to a voltage level
In either case, internal or external,
reference, either constant or slow varying. The external
reference is applied to a pin on the top rear connector,
may be divided down from a higher reference voltage.
FIVE INPUT RANGES
The AD2033 provides five separate inputs: 199.9mV;
When reading is dB, these input ranges are extended to
greatly increases reliability.
ranges, but the standardunit
The use of MOS/LSI (Metal Oxide Semiconductor/Large
the number of components,
500mV, 5V, SOY, SOOV and 62SV rms.
Factory calibration provides excellent accuracies on all five
rms FS range. Optimized calibration for the other ranges
SECOND GENERATION
Scale Integration)
1.999V; 19.99V; 199.9V and 600V rms Full Scale (FS).
1000V rms FS input is available upon special request.
is also available. The floating opto-isolated
withstands common mode voltages up to 300V rms, even
with digital outputs and control lines connected.
only facilitates making measurements
environments,
ments which are rarely referenced directly to ground.
but is essential in making current measure-
integrated circuits in the AD2033 reduces
M.ultirange,~Meter.
DPM DESIGN
.'AD2033
cuts power consumption
is optimized for the 1.999V
Truerms
in various electrical
-~
analog input
-~--
This not
/
and
dB
and
, I
1m

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ad2033 Summary of contents

Page 1

... AD2033 uses im- plicit compu ting techniques to derive the actual rms value of the ac signals. Thus, the accuracy of the AD2033 does not depend on input waveforms. Pulse trains, triangular pulses and SCR chopped sinewaves, even with high crest ...

Page 2

... AD2033 Converter arc needed 30 pin, 0.156" spacing card cdge connector, Optional illumi- . AD2033 rms/dB Card Connector must sink 25mA 36 pin, 0.156" spacing card edge connecror, Optional: 'Overrange of 250% of full scale is available for analog only output data; LogIc "I" or open (pin R) on all ranges except ...

Page 3

... RDG :1:0.3% RDG :1:0.05% FS .:1:0.05% FS :1:1digit :1:1digit :to. :l:60jJ.V/C :t75ppm/C :t75ppm/C 30Hz to 10kHz 30Hz to 10kHz 30Hz to 100kHz 30Hz to 100kHz Table 1. AD2033 rms Specifications FEEDBACK RANGE SELECT ICI FEEDBACK 0 {DIFEEDBACK J 0 IAI 12 RANGES MB FEEDBACK ' l EI RANGE C '-~ of bias current 0 INPUT RANGE A (~IINPUT RANGES B,C,D ...

Page 4

... Set up in similar fashion on other ranges. Bipolar dc Measurements By bypassing the nos/dB front end possible to use the AD2033 to measure and display a bipolar dc value on the 1.999V FS. The input pin for this measurement the AID Input Pin (Pin 18 of P2). Connect low side to Ground (Pins 1-6). A shunt capacitor (0.047/-LF) at the AID Input is needed to limit input impedance ...

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