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

DMS-20PC Series
3½ Digit, LED Display, Low-Cost, Subminiature
Digital Panel Voltmeters
Laonwd-pgNoreewweenr _LbEluDes
FEATURES
N Lowest-cost LED meters
N Subminiature size:
1.38" x 0.88" x 0.48" (35mm x 22mm x 12mm)
N Large (0.37"/9.4mm) LED display
N Choice of 6 LED colors
N High-intensity or low-power (7mA) red LEDs optional
N Epoxy-encapsulated, 12-pin DIP package with built-in
color filter and bezel
N 4 differential input voltage ranges
N Factory calibrated, ±1 count accuracy
N Single +5V power supply
N User-selectable decimal point placement
N DISPLAY ENABLE function for "power-down" mode
N DISPLAY TEST and HOLD (optional) functions
N 0 to +60°C temperature range
DMS-20PC Series, 3½ Digit, LED Display, Digital Panel Voltmeters combine a preci-
sion 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, green or
blue colors. High-intensity and low-power (35mW total) red LEDs 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.
SIMPLIFIED SCHEMATIC DIAGRAM
1
+5V SUPPLY
DISPLAY ²
ENABLE
3
5V RETURN
+5V
DC/DC
CONVERTER
0 Vdc
V+
–5V
V–
A/D
CONVERTER
0.01 ²
μF
»+2.0V
R2 ¹
R1
909k
12
(–) INPUT LO
11
(+) INPUT HI
10 _ANALOG
COMMON
4
DP 3
DATA
9 _DISPLAY 3
TEST/HOLD
5
DP 2
8
+5V
REFERENCE OUT
6
DP 1
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.
Ḥ
For full details go to
www.murata-ps.com/rohs
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
www.murata-ps.com
Technical enquiries email: [e-mail], tel: [phone]
MPM_DMS_20PC.D02 Page 1 of 6