DMS-40LCD Series

4½ Digit, LCD Display Digital Panel Voltmeters

MPM_DMS40LCD.C02 Page 2 of 6

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TECHNICAL NOTES

DMS-40LCD - 0/1 - 5

-C

Each model in the DMS-40LCD Series offers two input voltage ranges that are

user-selectable via pin strapping. 5V-powered models can be used to perform either

differential or single-ended measurements. 9V-powered models can only be used for

differential measurements.

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.

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).

See Technical Notes.

Performance/Functional Specifications

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

1. Input Voltage Range Selection: Each model in the DMS-40LCD

Series offers two, user-selectable, input voltage ranges as indicated

in the Performance/Functional Specifications Table and the Ordering

Information. To select the higher range of any device (such as the ±2V

range for the DMS-40LCD-0/1), connect pin 2 (RANGE SELECT) to

pin 1 (+5V SUPPLY/+BATTERY). To select the lower range, leave pin 2

open.

2. Decimal Point Placement: The location of the decimal point is user-

selectable, and the decimal point control pins (DP1-DP4) are active low

functions. Select the appropriate decimal point by tying the appropriate

pin (pin 4, 5, 6 or 8) to pin 3 (5V RETURN/–BATTERY). Unused deci-

mal point location pins should be left open. For 5V-powered models,

the decimal location pins are TTL compatible and may be hard wired as

described above or driven with 5V TTL logic gates.

Leave blank for standard

models. Add B for

backlit models.

Power Source:

5 = +5V

9 = +9V

Accessories:

DMS-30-CP

Panel cutout punch

DMS-BZL1-C

DMS-40 bezel assembly

DMS-BZL2-C

DMS-40 bezel assembly with sealing gasket

DMS-EB-C

Application/evaluation board with standard

MOLEX connector, decimal point solder pads

and attenuation resistor pads.

Input Ranges:

0/1 = ±200mV/±2V

1/2 = ±2V/±20V

2/3 = ±20V/±200V

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

Analog Inputs

Min.

Typ.

Max.

Units

Full Scale Input Range:

DMS-40LCD-0/1

–

±200/±2

–

mV/V

DMS-40LCD-1/2

–

±2/±20

–

V/V

DMS-40LCD-2/3

–

±20/±200

–

V/V

Input Impedence:

DMS-40LCD-0/1

100

1000

M

DMS-40LCD-1/2

0.8

1

–

M

DMS-40LCD-2/3

0.8

1

–

M

Overvoltage Protection

–

–

±250

Volts

Common Mode Voltage Range

–

–

±2

Volts

CMRR (dc to 60Hz)

–

86

–

dB

Control Inputs

Decimal Pt. Placement (Pins 4-6, 8):

Functionality

Logic Compatibility

Tie to pin 3 to activate

TTL (on 5V-powered models)

Hold/Backlight Functionally (Pin 9)

Backlit Models

Non-backlit Models

Tie to pin 1 to activate

Tie to pin 3 to hold reading

Performance

Sampling Rate

2.5 reading per second

Accuracy (1 minute warm-up):

DMS-40LCD-0/1 (Vin = +0.19/1.9V)

–

±2

±3

Counts

DMS-40LCD-1/2 (Vin = +1.9V)

–

±2

±3

Counts

DMS-40LCD-1/2 (Vin = +19V)

–

±3

±4

Counts

DMS-40LCD-2/3 (Vin = +19/190V)

–

±3

±4

Counts

Zero Reading (Vin = 0 Volts)

“–001”

“000”

“001”

Temperature Drift (0 = +50°C)

DMS-40LCD-0/1

DMS-40LCD-1/2

DMS-40LCD-2/3

–

–

–

±0.4

±0.6

±0.6

±0.8

±1

±1

Cnts/°C

Cnts/°C

Cnts/°C

Power Supply Requirements (5V Models)

Supply Voltage

+4.75

+5.00

+5.25

Volts

Supply Current:

Standard Models

–

+2.5

+3.5

mA

Backlit Models

–

+37

+45

mA

Power Supply Requirements (9V Models)

Supply Voltage

+7.5

+9.00

+14.0

Volts

Supply Current:

Standard Models

–

+1.5

+2.5

mA

Backlit Models

–

+37

+45

mA

Display

Display Type and Size

4½ 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

Add -C for RoHS

Physical/Environmental

Operating Temperature

0

–

+50

°C

Storage Temperature

–20

–

+75

°C

Humidity (non-condensing)

0–

95

%

Case Material

Polycarbonate

Weight

0.75 ounces (21 grams)