DMS-20 Datel, DMS-20 Datasheet

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DMS-20

Manufacturer Part Number
DMS-20
Description
LCD SEGMENTED NUMERIC CHARACTER MODULE
Manufacturer
Datel
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
DMS-20LCD-1-9-C
Manufacturer:
Murata Power Solutions Inc
Quantity:
135
Part Number:
DMS-20LCD-1-DCM-C
Manufacturer:
Murata Power Solutions Inc
Quantity:
135
Part Number:
DMS-20LCD-3-5B-C
Manufacturer:
MURATA/村田
Quantity:
20 000
Part Number:
DMS-20PC-0-BL-C
Manufacturer:
Murata Power Solutions Inc
Quantity:
135
Part Number:
DMS-20PC-0-BS-C
Manufacturer:
Murata Power Solutions Inc
Quantity:
135
Part Number:
DMS-20PC-0-DCM-B-C
Manufacturer:
Murata Power Solutions Inc
Quantity:
135
Part Number:
DMS-20PC-1-LM-GF-C
Manufacturer:
MURATA/村田
Quantity:
20 000
DATEL, Inc., Mansfield, MA 02048 (USA)
Features
Lowest cost
Lowest power, 2mW
Subminiature size:
Large (0.37"/9.4mm), enhanced-
contrast LCD display
Backlit displays optional
Epoxy-encapsulated, 12-pin DIP
Panel or pc-board mountable
4 differential input voltage ranges
High accuracy, ±1 count (±0.05%)
Single +5V supply or 9V battery
Low-battery annunciator
User-selectable decimal point placement
0 to +60°C temperature range
1.38" x 0.88" x 0.43"
35mm x 22mm x 11mm
www.datel.com
+5V SUPPLY/
5V RETURN/
+BATTERY
–BATTERY
DP 3
DP 2
DP 1
N.C.
1
2
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.
Only used on ±200mV (-0) and ±2V (-1) models.
1
2
3
4
5
6
Actual Size
0 Vdc
Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356
CONVERTER
DC/DC
ultimate combination of low price, low power, small size and high performance in digital
meters. Epoxy encapsulated in a subminiature (1.38" x 0.88" x 0.43"), 12-pin DIP
package, these completely self-contained, fully operational meters offer a combination
of ruggedness, long-term reliability and component-like ease-of-use simply not
available in any other meters.
converter, DMS-20LCD meters are extremely accurate (±1 count) and are only slightly
larger than their 0.37"/9.4mm, enhanced-contrast, LCD displays. All models incorpo-
rate a built-in bezel and are easily mounted in either panels or pc boards. Both backlit
and non-backlit versions are available.
and ±200V) and a user-friendly input structure. Input impedance is a minimum 800k .
CMRR is typically 86dB with a CMV of ±2V. Non-inverting inputs are overvoltage
protected to ±100V (±250V for the ±200V input model).
single +9V supply/battery (drawing 230µA). All models have a low-battery ("B")
annunciator and feature autopolarity changeover and overrange indication.
the back of any DMS-20LCD allowing direct inputs for common applications such as
4-20mA inputs, zero/gain adjust, decimal point location, and input voltage dividing.
J1
Figure 1. DMS-20LCD Series Simplified Schematic
3
+5V
DMS-20LCD Series, 3½ Digit, LCD Display, Digital Voltmeters represent the
Incorporating a precision reference and a factory-calibrated, autozeroing A/D
DMS-20LCD meters have 4 differential input voltage ranges (±200mV, ±2V, ±20V
All DMS-20LCD meters operate from a single +5V supply (drawing 400µA) or a
Also available is an application/evaluation board (DMS-EB2) that plugs directly onto
DATA
CONVERTER
–5V
A/D
V+
V–
3
4
DC/DC converter is not used on 9V-powered models,
J1 is connected.
Used on backlit models only.
N.C. for non-backlit models.
DMS-20LCD Series
+5V
0.01µF
+2.0V
2
Email: sales@datel.com
R2
1
909k
Low-Cost, Subminiature
R1
Digital Panel Voltmeters
®
3½ Digit, LCD Display
12
11
10
9
8
7
ANALOG
COMMON
REFERENCE OUT
REFERENCE IN
(–) INPUT LO
(+) INPUT HI
N.C./BACKLIGHT
Internet: www.datel.com
4
®

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DMS-20 Summary of contents

Page 1

... All models have a low-battery ("B") annunciator and feature autopolarity changeover and overrange indication. Also available is an application/evaluation board (DMS-EB2) that plugs directly onto the back of any DMS-20LCD allowing direct inputs for common applications such as 4-20mA inputs, zero/gain adjust, decimal point location, and input voltage dividing. +5V V+ – ...

Page 2

... Power Source ±200V +9V DMS-20-CP Panel cutout punch DMS-BZL3 DMS-20 bezel assembly DMS-BZL4 DMS-20 bezel assembly with sealing gasket DMS-EB2 Application/evaluation board with standard MOLEX connector, decimal point solder pads and attenuation resistor pads. DMS-PS1-CM +5V/1.0A AC/DC power supply module Order on-line at www.datel.com ...

Page 3

... The circuit shown in Figure 9 provides ±10% range of adjustment. 7. Soldering Methods: All models in the DMS-20LCD Series easily withstand most common wave soldering operations. We recommend, however, that you evaluate the effects your particular soldering techniques may have on the meter's plastic case and high-precision electrical performance ...

Page 4

... Models) 5. Process Control (4-to-20mA) Measurements: In many common process-control applications, a 4-to-20mA current loop is used to transmit information. Because DMS-20LCD meters have such high input impedance, a simple shunt resistor across the meter's input can be used to convert the loop current to a voltage. See Figure 7. The value of the shunt resistor is a ...

Page 5

... Power Supply Monitoring: A popular application for DATEL's low-power LCD meters is monitoring the supply voltage in battery- operated portable equipment. Figure 8 demonstrates how a 9V- powered DMS-20LCD can be used to monitor its own supply. The meter used is the DMS-20LCD-1-9. A three-resistor voltage divider is used to attenuate the battery voltage and also to satisfy the requirement that the input voltages applied to pins 12 and least 1 ...

Page 6

... ISO 9001 ISO 9001 DATEL (UK) LTD. Tadley, England Tel: (01256)-880444 DATEL S.A.R.L. Montigny Le Bretonneux, France Tel: 01-34-60-01-01 DATEL GmbH München, Germany Tel: 89-544334-0 DATEL KK Tokyo, Japan Tel: 3-3779-1031, Osaka Tel: 6-354-2025 DMS-20LCD-X-XX USA IN MADE ® ® FRONT VIEW ...

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