AD2023_15 Datasheet, PDF (1/4 Pages) Analog Devices – 3 Digit DPM Module

-.. ANALOG
W DEVICES
3 DigitDPMModule
AD2023
FEATURES
Third Generation 12L LSI Design
Multiplexed Seven Segment Output Version
Character Serial BCD Output Version
Balanced Differential Input
Low Power: +5V@0.1 Watts (Converter Only)
Small Size 2" x 2" x 0.4" (51x51x10.2mm)
Wide Operating Temperature Range to Extremes of -40°C
OBSOLETE and +100° CAvailable Upon Special Request
Low Cost: AD2023 - $39/1-9, $28/100s
AD2023/B - $37/1-9, $27/100s
APPLICATIONS
LED, LCD, Beckman, etc. Display, Digital Panel Meters
(DPMs), Particularly Where Available Front Panel Meters
Prohibits Use of Traditional DPMs.
ADC Requirements
GENERAL DESCRIPTION
The AD2023 is a low cost, 3 digit DPM module containing all
the circuitry, except gain adjust pot, to drive three external
display digits. The AD2023, with seven segment output, and
the AD2023/B, with character serial BCD output, enable the
user to drive any type of digital display.
Packaged in a small 2" x 2" x 0.4" module and requiring only
+5V power, the AD2023 and AD2023/B address DPM needs
EXCELLENT PERFORMANCE
The AD2023 measures inputs from -99mV to +999mV with an
an accuracy of 0.1% of reading:!:1 digit. Zero shift is :!:0.5mV
over the full operating temperature range, resulting in the same
performance as a DPM with auto zero. The balanced differen-
tial input rejects common mode voltages up to 200mV, enough
to eliminate most ground loop problems.
Automatic polarity indication is provided by using the MSD
where available front panel space is limited.
(most significant digit) to indicate negative inputs. With the
The module, utilizing an 12L LSI design, minimizes component
count. Most of the analog and digital circuitry is implemented
on a single proprietory chip. The design is similar to and is
based on the same 12L device as the highly successful AD2026
DPM. And all of the high AD2026 standards for quality and
reliability are retained.
AD2023, automatic overrange indication for inputs greater
than +999mV is displayed as J J J and for inputs less than
-99mV, as - - -. The AD2023/B overload indication is BCD
output code 1011 for all digits for inputs greater than +999mV
and 1010 for all digits for inputs less than -99mV.
WIDE TEMPERATURE RANGE
AD2023 (WITH SEVEN SEGMENT OUTPUT)
Wide temperature range modules, for extreme environment
The AD2023 can drive a 3 digit LED (light emitting diode)
display. Except for the display which is wired directly to the
segment output pins of the module and a gain pot, all the cir-
cuitry is self contained (an optional offset pot can also be used
if desired). The AD2023 drives any size and type of currently
available LED display (for application assistance see Page 3,
Figure 3).
applications, are available up~n special re~uest. Operating
temperature extremes of -40 C and + 100 C and storage tem-
perature of -55°C and +125°C allow the user to apply the
AD2023 in environments where conventional DPMs cannot
be used. Wide temperature range displays are also currently
available from several v~ndors. (For further information con-
sult factory.)
AD2023/B (WITH BCD OUTPUT)
With appropriate decoder driver, the AD2023/B character
serial BCD output unit can drive a variety of different dis-
plays. . . ie., LED, LCD, BecKman, etc. . Only decoder driver,
gain adjust pot, display and digit drivers when necessary are
needed to complete the DPM.
Information furnished by Analog Devices is believed to be accurate
and reliable. However, no responsibility is assumed by Analog Devices
for its use; nor for any infringements of patents or other rights of third
parties which may result from its use. No license is granted by implica-
tion or otherwise under any patent or patent rights of Analog Devices.
Route 1 Industrial Park; P.O. Box 280; Norwood, Mass.02062
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