FEATURES

 Super-bright LED displays are readable in direct

sunlight!

 Autodim circuitry automatically adjusts display

brightness

 Includes external brightness adjustment

 Large (0.56"/14.2mm) easy-to-read red LED display

 High reliability alternative to LCD displays

 Ideal for automotive, industrial, and marine applications

 Encapsulated package mounts in panels or pc-boards

 Miniature housing: 2.17˝ x 0.92" x 0.56"

(55mm x 23mm x 14mm)

 4 differential input ranges provide ±1 count accuracy

 Single +5V supply; Less than 1-Watt power consumption

 0 to +60°C operating temperature range

Murata Power Solutions’ new DMS-30DR Series are the first digital panel meters to offer LED

displays that are readable in direct sunlight—no special filters or shading devices are required.

Their Autodim circuit automatically adjusts the display’s brightness to suit viewing environments

ranging from total darkness to full, brilliant sunlight. A user-accessible brightness adjustment pin

enables custom intensity settings or display matching in multiple display applications. Washed

out, hard-to-read digital readouts are a thing of the past!

Until now, users whose instrumentation required daylight visibility had to settle for less

reliable LCD display technology. However, in order to remain legible in low ambient light, LCDs

require complex, power-hungry backlighting circuitry. And, these displays typically suffer from

very narrow viewing angles. In contrast, DMS-30DR Series LED-based displays’ power consump-

tion drops as ambient light decreases, and their viewing angle extends to nearly 180 degrees

vertically and horizontally.

All models operate from a single +5V supply, and draw as little as 7mA when operated in total

darkness—that’s less than 1/10 Watt. At maximum brightness power consumption is typically

less than 200mA (1 Watt). DMS-30DR voltmeters are available in four differential input voltage

ranges: ±200mV, ±2V, ±20V and ±200V. Input impedance is 1,000 megohms for the ±200mV

and ±2V inputs and 1 megohm for the ±20V and ±200V inputs. CMRR for all devices is 86dB,

and inputs are overvoltage protected to ±250V. Each meter incorporates a precision, ultra-stable

voltage reference and is factory calibrated prior to encapsulation.

The small size (2.17" x 0.92" x 0.56") of DMS-30DR meters is achieved by integrating their

display, Autodim display drivers, light sensor, reference circuit, and A/D converter into in a rugged

epoxy-encapsulated assembly. The device’s 12-pin, component-like, DIP package is both vibra-

tion and moisture proof, making them ideal for harsh environments. Each package incorporates a

built-in color filter and bezel, and is easily mounted in either panels or pc boards.

1

+5V SUPPLY

+5V

+5V

0.01μF

R2 (1)

12

(–) INPUT LO

EXTERNAL BRIGHTNESS 2

ADJUSTMENT

DC/DC

CONVERTER

–5V

–5V

R1

909k

11

(+) INPUT HI

3

5V RETURN

0 Vdc

+5V

–5V

A/D

CONVERTER

DATA

1.225V

REF.

10 ANALOG

COMMON

DP 3

4

9

1.82k

+1.225V REFERENCE OUT

5

DP 2

6

DP 1

LIGHT

SENSOR

+5V

8

REFERENCE OUT

7

REFERENCE IN

For full details go to

www.murata-ps.com/rohs

Figure 1. DMS-30DR Simplified Schematic

(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.

MPM_DMS-30DR.C03 Page 1 of 6

www.murata-ps.com/support

DMS-30DR Series

Sunlight Readable, 3½ Digit Panel Meters

with Auto-Dimming LED Displays

MPS Part Number

Product Status

LTB Date

DMS-30DR-0-R-C

Discontinued

3/29/2019

DMS-30DR-1-R-C

To be discontinued

4/30/2024

DMS-30DR-2-R-C

To be discontinued

4/30/2024

DMS-30DR-3-R-C

Discontinued

3/31/2016