DATEL DMS-30LCD-0-9B, DMS-30LCD-0-9, DMS-30LCD-0-5B, DMS-30LCD-0-5, DMS-30LCD-3-9B Datasheet

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www.datel.com

Actual Size

DMS-30LCD Series

3½ Digit, LCD Display

Low-Power, Miniature

Digital Panel Voltmeters

Features

•Large (0.4"/10.2mm), enhancedcontrast, 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

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. Batteryoperated 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), DMS30LCD 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 recalibration.

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

	+5V SUPPLY/ 1				+5V			12
						V+
	+BATTERY							(–) INPUT LO
						R2	1
					–5V	0.01µF
							R1
3	DISPLAY TEST/	2	DC/DC	2				11
	BACKLIGHT		CONVERTER			V–		(+) INPUT HI
							909k
						≈ +2.0V
	5V RETURN/ 3			J1	A/D			10 ANALOG
	–BATTERY		0 Vdc		CONVERTER			COMMON
						1.23V
		4			DATA	REF.		9
	DP 3
								+1.23V REFERENCE OUT
							1.82k
	DP 2	5						8
								REFERENCE OUT
						+5V
	DP 1	6						7
								REFERENCE IN
	1 R2 is not used on ±200mV (-0) models or ±2V (-1) models.					2 DC/DC converter is not used on 9V-powered models,
		R2 = 100k on ±20V (-2) models and 9.1k on ±200V (-3) models.				J1 is connected.
						3 Display Test function is not available on backlit models.

Figure 1. DMS-30LCD Series Simplified Schematic

DATEL, Inc., Mansfield, MA 02048 (USA) • Tel: [phone] Fax: [phone] • Email: [e-mail] • Internet: www.datel.com

DMS-30LCD	3 ½ D I G I T , L C D D I S P L A Y D I G I T A L P A N E L V O L T M E T E R S

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.

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 Impedance:
DMS-30LCD-0, -1	100		1000	--		MΩ
DMS-30LCD-2, -3	0.8		1	--		MΩ
Overvoltage Protection
DMS-30LCD-0, -1, -2	--		--	±100		Volts
DMS-30LCD-3	--		--	±250		Volts
Common Mode Voltage Range	--		--	±2		Volts
CMRR (dc to 60Hz)	--		86	--		dB
Control Inputs
Decimal Point Placement (Pins 4-6):
Functionality			Tie to pin 3 to activate
Logic Compatibility		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 samples per second
Accuracy (1 minute warm-up):
DMS-30LCD-0 (VIN = +0.19)	--		±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 to +60°C)	--		±0.15	±0.3		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		+9.0	+14.0		Volts
Supply Current:
Standard Models	--		350	600		µA
Backlit Models	--		45	60		mA
Display
Display Type and Size	3½ Digit LCD, 0.4"/10.2mm high
Polarity Indication	Autopolarity ("–" for negative VIN)
Overrange Indication		"–1_ _ _" for negative VIN
			"1_ _ _" for positive VIN
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)

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.

Ordering Information

DMS-30LCD - 1 - 5

Input Range:

Leave blank for standard

0 = ±200mV

models.

1 = ±2V

Add B for backlit models.

2 = ±20V

3 = ±200V

Power Source:

5 = +5V

9 = +9V

Accessories:

DMS-30-CP

Panel cutout punch

DMS-BZL1

DMS-30 bezel assembly

DMS-BZL2

DMS-30 bezel assembly with sealing gasket

RN-DMS

Gain/offset potentiometer kit for DMS-EB,

DMS-EB-AC/DC and DMS-EB-DC/DC

Add-On Application Boards:

DMS-EB

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

DMS-EB-HTB

High-accuracy temperature probe sensing for

±200mV models

DMS-EB-DC/DC

Provides isolated +5V power

DMS-EB-TCJ

J-type thermocouple inputs for ±2V models

DMS-EB-TCK

K-type thermocouple inputs for ±2V models

DMS-EB-RMS

For true rms measurements of ac voltages

DMS-EB-AC/DC

For ac line-powered applications

DMS-EB-LP

For 4-to-20mA loop-powered applications

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

Order on-line at www.datel.com

Technical Notes

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 "floating" measurements as described in the Applications section of this data sheet and Ap Note 3 of the DATEL Panel Meter Catalog.

Pin 10 should not be connected to pin 3 (5V RETURN/ –BATTERY) or to your system’s analog ground.

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