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DMS-30LCD Series

3½ Digit, LCD Display Digital Panel Voltmeters

MPM_DMS30LCD.E01 Page 2 of 6

TECHNICAL NOTES

Performance/Functional Specifications

Typical at TA = +25°C and supply voltage = +5V (using the single-ended input circuit)

or +9V (using the differential input circuit), unless otherwise noted.

➀ Applies for transient or continuous overvoltages applied to (+) INPUT HI (pin 11)

with (–) INPUT LO (pin 12) properly connected. Pin 12 is not overvoltage

protected (see Figure 1). Voltages applied to pin 12 should not exceed the

supply voltage.

➁ Listed spec applies to 5V-powered models only. For 9V-powered models, both

(–) INPUT LO (pin 12) and (+) INPUT HIGH (pin 11) must always be at least

1.5V above –BATTERY (pin 3) and at least 1.5V below +BATTERY (pin 1).

➂ See Technical Notes.

DMS-30LCD - 1 - 5

- C

Input Range:

0 = ±200mV

1 = ±2V

2 = ±20V

3 = ±200V

DMS-30-CP

Panel cutout punch

DMS-BZL1-C

DMS-30 bezel assembly

DMS-BZL2-C

DMS-30 bezel assembly with sealing gasket

Add-On Application Boards:

DMS-EB-C

Multi-purpose (gain/offset, 4-20mA, etc.)

DMS-EB-DC/DC-C

Provides isolated +5V power

DMS-EB-RMS-C

For true rms measurements of ac voltages

DMS-EB-AC/DC-C

For ac line-powered applications

A panel-mount retaining clip is supplied with each model.

Leave blank for standard

models.

Add B for backlit models.

Power Source:

5 = +5V

1. +1.23V REFERENCE OUTPUT (Pin 9): This pin is the output of the

meter’s precision +1.23V internal reference, and it is referenced to

ANALOG COMMON (pin 10) which sits at a potential of approximately

+2V. This output should be buffered if used to drive external loads

since sourcing more than 15µA from pin 9 can affect both the initial

accuracy and temperature drift of the meter.

2. ANALOG COMMON (Pin 10): This pin is connected to an internal,

low-noise, “relative” ground. It is used in certain differential and “float-

ing” measurements as described in the Applications section of this data

sheet and Ap Note DMS-AN3 at

http://www.murata-ps.com/data/meters/dms-an3.pdf. Pin 10 should

not be connected to pin 3 (5V RETURN/–BATTERY) or to your

system’s analog ground.

Analog Inputs

Min.

Typ.

Max.

Units

Full Scale Input Range:

DMS-30LCD-0

–

±200

–

mV

DMS-30LCD-1

–

±2

–

Volts

DMS-30LCD-2

–

±20

–

Volts

DMS-30LCD-3

–

±200

–

Volts

Input Impedence:

DMS-30LCD-0, -1

100

1000

–

MΩ

DMS-30LCD-2, -3

0.8

1

–

MΩ

Overvoltage Protection

➀

––

DMS-30LCD-0, -1, -2

–

–

±100

Volts

DMS-30LCD -3

–

–

±250

Volts

Common Mode Voltage Range

➁

–

–

±2

Volts

CMRR (dc to 60Hz)

–

86

–

dB

Control Inputs

➂

Decimal Pt. Placement (Pins 4-6):

Functionality

Logic Compatibility

Tie to pin 3 to activate

TTL (on 5V-powered models)

Display Test (Pin 2)

Tie to pin 1 to activate

Backlight (Pin 2)

Tie to pin 3 to turn on backlight

Performance

Sampling Rate

2.5 reading per second

Accuracy (1 minute warm-up):

DMS-30LCD-0 (Vin = +0.19V)

–

±1

±2

Counts

DMS-30LCD-1 (Vin = +1.9V)

–

±1

±2

Counts

DMS-30LCD-2 (Vin = +19V)

–

±2

±3

Counts

DMS-30LCD-3 (Vin = +190V)

–

±2

±3

Counts

Zero Reading (Vin = 0 Volts)

“–001”

“000”

“001”

Temperature Drift (0 = +60°C)

–

±0.2

±0.4

Cnts/°C

+1.23V Reference Out (Pin 9)

+1.20

+1.23

+1.25

Volts

Power Supply Requirements (5V Models)

Supply Voltage

+4.75

+5.00

+5.25

Volts

Supply Current:

Standard Models

–

800

1200

µA

Backlit Models

–

45

60

mA

Power Supply Requirements (9V Models)

Supply Voltage

+7.5

+9.00

+14.0

Volts

Supply Current:

Standard Models

–

350

600

µA

Backlit Models

–

45

60

mA

Display

Display Type and Size

3½ digit, 0.4"/10.2mm high LCD

Polarity Indication

Autopolarity ("–" for negative Vin)

Overrange Indication

"–1_ _ _ " for negative inputs

"1_ _ _ " for positive inputs

Ordering Information

*

Physical/Environmental

Operating Temperature

0

–

+60

°C

Storage Temperature

–20

–

+75

°C

Humidity (non-condensing)

0

–

95

%

Case Material

Polycarbonate

Weight

0.75 ounces (21 grams)

Add -C for RoHS

9 = +9V

*See www.murata.com/products/power for model-specific availability.

Accessories: