DMS-30LCD Series

3½ Digit, LCD Display Digital Panel Voltmeters

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MPM_DMS30LCD.D01 Page 1 of 6

Offering all the outstanding features and benefits of DATEL’s industry leading DMS-

20LCD Series of 3½ Digit LCD Panel Meters, DMS-30LCD meters offer larger, more easily

readable displays at slightly higher power consumptions. Like all DMS Series LCD meters,

these miniature (2.17” x 0.92” x 0.43”), epoxy-encapsulated devices offer component-like

ease-of-use, outstanding reliability and easy installation in either panels or pc-cards.

DMS-30LCD devices operate from a single +5V supply or a 9V battery. Battery-oper-

ated units typically draw 350μA and consume a mere 3.2mW. Backlit models are available

for low-light applications; though we have found many designers prefer DATEL’s unique

low-power LED meters in those circumstances.

Offering 4 optional input voltage ranges (±200mV, ±2V, ±20V or ±200V), DMS-30LCD

meters have an extremely user-friendly input structure. They can be used in differential

or single-ended modes. Input impedance is a minimum 800kΩ. CMRR is typically 86dB.

CMV is ±2V, and inputs are overvoltage protected to ±100V.

Each meter incorporates an extremely stable, double regulated reference and is fully

calibrated at our factory prior to encapsulation. We guarantee outstanding initial accuracy

(±1 count) and excellent stability over temperature (±0.15 counts/°C). These extremely

rugged meters are moisture and vibration proof and never require adjustment or recalibra-

tion.

For popular applications (4-to-20mA, rms-to-dc conversion, ac line power, J and K

thermocouples, etc.), the DMS-30LCD Series includes a complete line of "plug-on" applica-

tion boards that conveniently convert your meter into an application-specific instrument.

FEATURES

Large (0.4"/10.2mm), enhanced-contrast, LCD display

Single +5V supply or 9V battery

Power as low as 3.2mW

Miniature size:

2.17" x 0.92" x 0.43" (55mm x 23mm x 11mm)

Epoxy-encapsulated, 12-pin DIP

Backlit displays optional

4 differential input voltage ranges

High accuracy, ±1 count (±0.05%)

Autopolarity changeover and overrange indication

User-selectable decimal point placement

Numerous "plug-on" application boards

0 to +60°C temperature range

　

+1.23V REFERENCE OUT

(+) INPUT HI

(–) INPUT LO

ANALOG

COMMON

REFERENCE OUT

REFERENCE IN

+5V SUPPLY/

+BATTERY

R1

DP 1

DP 2

DP 3

6

5

4

9

11

12

10

8

7

1

3

DC/DC

CONVERTER

2

5V RETURN/

–BATTERY

+5V

–5V

+5V

1.23V

REF.

R2

+2.0V

DATA

909k

V+

V–

A/D

CONVERTER

0 Vdc

0.01μF

1

DISPLAY TEST/

BACKLIGHT

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.

J1

DC/DC converter is not used on 9V-powered models,

J1 is connected.

Display Test function is not available on backlit models.

1.82k

3

2

1

3

2