DMS-20PC Datasheet, PDF (1/6 Pages) List of Unclassifed Manufacturers – 3½ Digit, LED Display Low-Cost, Subminiature Digital Panel Voltmeters

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www.datel.com
Actual Size
DMS-20PC Series
3½ Digit, LED Display
Low-Cost, Subminiature
Digital Panel Voltmeters
Features
• Lowest-cost LED meters
• Subminiature size:
1.38" x 0.88" x 0.48"
35mm x 22mm x 12mm
• Large (0.37"/9.4mm) LED display
• Choice of 5 LED colors
• High-intensity or low-power (7mA) red
LED's optional
• Epoxy-encapsulated, 12-pin DIP package
with built-in color filter and bezel
• 4 differential input voltage ranges
• Factory calibrated, ±1 count accuracy
• Single +5V power supply
• User-selectable decimal point placement
• DISPLAY ENABLE function for
"power-down" mode
• DISPLAY TEST and HOLD (optional)
functions
• 0 to +60°C temperature range
DMS-20PC Series, 3½ Digit, LED Display, Digital Panel Voltmeters combine a
precision A/D converter; a factory-trimmed, highly stable, voltage reference; and a
large (0.37"/9.4mm), easy-to-read LED display in a single package that is only
slightly larger than the display itself. Displays are offered in either red, orange,
amber, yellow or green colors. High-intensity and low-power (35mW total) red LED's
are also optional.
These low-cost meters are fully self-contained and fully functional. Their
subminiature (1.38" x 0.88" x 0.48"), epoxy-encapsulated cases incorporate built-in
color filters and bezels; are moisture and vibration proof; and function well in the
harshest environments. Their 12-pin, dual-in-line configuration offers component-like,
plug-in convenience and maximum versatility. Operating temperature range is 0 to
+60°C.
The meters come with one of four, differential, input voltage ranges: ±200mV, ±2V
±20V or ±200V. Input impedance is a minimum 800kΩ. CMRR is typically 86dB (dc
to 60Hz), and CMV is ±2V. Input overvoltage protection (on the non-inverting input)
is ±250V. Devices are fully calibrated at the factory to an accuracy of ±1 count
(±0.05% of full scale range) and never require calibration or adjustment.
A DISPLAY ENABLE function permits the display to be disabled for "power-
down" operation. All models have a DISPLAY TEST function. Standard red LED
models offer an optional DISPLAY HOLD function.
Small size, low cost and adjustment-free reliability make the DMS-20PC Series
the best choice for all your 3½ digit, LED, DPM applications.
1
+5V SUPPLY
DISPLAY ²
ENABLE
3
5V RETURN
4
DP 3
5
DP 2
6
DP 1
+5V
V+
–5V
DC/DC
CONVERTER
V–
0 Vdc
A/D
CONVERTER
DATA
0.01 ²
µF
» +2.0V
R2 ¹
R1
909k
12
(–) INPUT LO
11
(+) INPUT HI
10 _ANALOG
COMMON
9 _DISPLAY 3
TEST/HOLD
8
+5V
REFERENCE OUT
7
REFERENCE IN
1 _{R2 is not used on ±200mV (-0) models or ±2V (-1) models.}
R2 = 100k on ±20V (-2) models and 9.1k on ±200V (-3) models.
2 Only used on ±200mV (-0) and ±2V (-1) models.
3 Pin 9 is DISPLAY TEST on all but eight models. On those models
(-H option), it is DISPLAY HOLD.
Figure 1. DMS-20PC Series Simplified Schematic
DATEL, Inc., Mansfield, MA 02048 (USA) • Tel: [phone] Fax: [phone] • E-mail: [e-mail] • Internet: www.datel.com