DMS30DR MURATA [Murata Manufacturing Co., Ltd.], DMS30DR Datasheet

DMS30DR

Manufacturer Part Number

DMS30DR

Description

Manufacturer

MURATA [Murata Manufacturing Co., Ltd.]

Datasheet

1.DMS30DR.pdf (6 pages)

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FEATURES

■

www.murata-ps.com

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

www.murata-ps.com/rohs

For full details go to

EXTERNAL BRIGHTNESS

ADJUSTMENT

+5V SUPPLY

5V RETURN

DP 3

DP 2

DP 1

SENSOR

LIGHT

www.murata-ps.com

CONVERTER

Figure 1. DMS-30DR Simpliﬁ ed Schematic

DC/DC

0 Vdc

displays that are readable in direct sunlight—no special ﬁ lters 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!

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.

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.

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 ﬁ lter and bezel, and is easily mounted in either panels or pc boards.

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

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

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

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

+5V

–5V

+5V

DATA

–5V

CONVERTER

A/D

+5V

–5V

Technical enquiries email: sales@murata-ps.com, tel:

(1)

Sunlight Readable, 3½ Digit Panel Meters

1.225V

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.

+5V

REF.

DMS-30DR Series

0.01—F

with Auto-Dimming LED Displays

(1)

909k

1.82k

MPM_DMS-30DR.B04 Page 1 of 6

(–) INPUT LO

(+) INPUT HI

ANALOG

COMMON

+1.225V REFERENCE OUT

REFERENCE OUT

REFERENCE IN

+1 508 339 3000

Related parts for DMS30DR

DMS30DR Summary of contents

Page 1

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 ...

Page 2

Performance/Functional Speciﬁ cations Typical +25°C and supply voltage = +5V using the single-ended input circuit, A unless otherwise noted. Analog Inputs Min. Full Scale Input Range: DMS-30DR-0 – DMS-30DR-1 – DMS-30DR-2 – DMS-30DR-3 – Input Impedence: – ...

Page 3

A ±1% 1.82K limiting resistor is connected between the reference IC and pin 9. 4. ANALOG COMMON (Pin 10): This pin is connected to an internal, low-noise, “relative” ground. Pin 10 also serves ...

Page 4

APPLICATIONS 2. Differential Input Conﬁ gurations: Differential measurements can be made with all DMS-30DR meters. Figure 3, though not a practical real- world application, uses a voltage divider to demonstrate the concept of a differential input signal. Be careful not ...

Page 5

APPLICATIONS Example: For a meter with a 2V full scale input (1.999 full scale reading) and a desired display reading of "1000" (with an input of 20mA 1.000 Volts Fsr R = 1.000V/(0.020 – 0.004)A Shunt R = ...

Page 6

MECHANICAL SPECIFICATIONS MECHANICAL DIMENSIONS: Inches (mm) TOLERANCES DEC ±0.02 (±0.51 DEC ±0.010 (±0.254) LEAD DIMENSIONS: 0.025 (0.635) x 0.025 (0.635) NOMINAL RECOMMENDED PC BOARD FINISHED HOLE DIAMETER: 0.042 ±0.003 (1.067 ±0.076) BEZEL INSTALLATION AND RECOMMENDED DRILL ...

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