AD2027_15 Datasheet, PDF (1/4 Pages) Analog Devices – DPMS WITH LED DISPLAYS

(
-.. ANALOG
W DEVICES
LowCost4Y2 Digit ^,
DPMsWithLEDDisplays
AD2024/AD2027
FEATURES
"Second Generation" MOS.LSI Design
Large 0.43" (11mm) LED Displays
- 4% Digit Resolution 20,000 Counts Full Scale
Limited Differential Input
Either Line Powered (AD2024) or Logic Powered (AD2027)
Industry Standard Case Designs
APPLICATIONS
OBSOLETE HighResolution/High Accuracy R_out for:
Test Equipment
Process Control Instrumentation
Analytical and Scientific Instruments
GENERAL DESCRIPTION
The AD2024 and AD2027 are low cost 41,1digit DPMs with
large LED displays. Both units offer the same features and iden-
tical performance, but the AD2024 is ac line powered and the
AD2027 is +5V dc powered.
THE BENEFITS OF SECOND GENERATION DESIGN
The AD2024 and AD2027 are designed around.MOS-LSI
(Metal Oxide Semiconductor, Large Scale Integration) inte-
External power supply outputs at +5V and -25V (-25V only
on the AD2027) are made available for powering external cir-
cuitry. In addition, control inputs for conversion "Hold",
display blanking and decimal point selection are provided.
INDUSTRY STANDARD CASE DESIGNS
Although both the AD2024 and AD2027 have identical elec-
trical designs, they are packaged in the case sizes that have
become industry standards for ac line powered and +5V dc
grated circuits which greatly reduce the number of components logic powered DPMs respectively. The AD2024 fits the 3.924"
and interconnections required to provide the p'erformance and x 1.682" (99.67 x 42.74mm) panel cutout common to most
features expected in a high resolution 41,1digit DPM.
ac line powered DPMs, and the AD2027 fits the 3.175" x
This "Second Generation" design, therefore, offers greatly
increased reliability and significantly lower cost at little com-
promise in performance. The large 0.43 inch (11mm) LED dis-
plays offer the brightness and readability previously available
only with gas discharge displays with the added advantage of
1.810" (80.65 x 45.97mm) panel cutout of the Analog Devices
logic power case design, now used by several other manufac-
turers of logic powered DPMs. Thus, interchangeability is
assured, allowing mechanical second sourcing for both these
DPMs.
an all solid state component.
DESIGNED AND BUILT FOR RELIABIUTY
HIGH RESOLUTION AND VERSATILE FEATURES
These DPMs measure dc input voltages over a full scale range
of :t1.9999V with an accuracy of :to.005% teading j:().OO5%of
full scale :t 1 digit. Using the "limited differential" input first
used by Analog Devices on the AD2010, the AD2024 and
AD2027 prevent ground loop problems and provide 50dB of
common mode rejection at common mode voltages up to
:t200mV. Normal mode rejection is 25dB at 50-60Hz.
BCD data outputs are provided in a bit parallel, character serial
Even beyond the reliability advantages of the LSI-IC design
and LED displays, the AD2024 and AD2027 have had extreme
care taken in their design and manufacture to insure reliability.
Manufacturing processes are monitored by continual quality
assurance inspections to insure proper workmanship and test-
ing. Automatic test equipment is used to test each DPM thor-
oughly and without error. And each AD2024 and AD2027,
like every Analog Devices DPM, receives a full one week failure-
free burn-in before shipment.
format compatible with CMOS logic systems. When applica-
tions require parallel BCD data, such as interfaces to printers,
compara~ors or slave displays, parallel BCD output options are
available that are compatible to standard TTL logic systems.
.
For detailed inform.don, contact factory.
DIGITAL PANEL INSTRUMENTS VOL. II, '~25