DMS-40LCD MURATA-PS | Alldatasheet

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4½ Digit, LCD Display Digital Panel Voltmeters MPM_DMS40LCD.C02 Page 1 of 6 For full details go to www.murata-ps.com/rohs www.murata-ps.com Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 Offering a unique combination of low cost, scientific-grade accuracy (±2 counts), component-like convenience and outstanding reliability, DMS-40LCD Series 4½ Digit DPM’s provide the ultimate combination of price, precision and convenience. These miniature (2.17” x 0.92” x 0.43”) digital voltmeters combine an advanced, autozeroing A/D converter, a precision reference circuit and a large (0.4”/10.2mm high), easy-to-read LCD display in a single, fully encapsulated, 12-pin DIP package. All models incorporate a built-in bezel and are easily mounted in either panels or pc boards. Each DMS-40LCD meter has a dual-range, differential, input configuration (±200mV/±2V, ±2V/±20V or ±20V/±200V) and is available with a backlit or non-backlit display. Input impedance is a minimum 800kΩ, and CMRR is typically 86dB (dc to 60Hz). CMV is ±2V, and all models are overvoltage protected to ±250V (on their non-inverting inputs). All DMS-40LCD meters are fully functional and operate from a single +5V supply (draw- autopolarity changeover and overrange indication. A display HOLD function is standard on all non-backlit models. Thanks to their rugged epoxy-based encapsulation and their advanced, factory-cal- ibrated A/D converters, DMS-40LCD meters are able to withstand the harshest environ- ments and never require adjustment or calibration. Plug-in convenience, long-term stability and wide operating temperature range (0 to +50°C) make DMS-40LCD meters the right solution for any high-accuracy DPM requirement.

FEATURES

N Scientific-grade accuracy, ±2 counts N Low power, typically 12.5mW N Miniature size: 2.17" x 0.92" x 0.43" (55mm x 23mm x 11mm) N Large (0.4”/10.2mm), enhanced-contrast, LCD display N Backlit displays optional N Epoxy-encapsulated, 12-pin DIP N Panel or pc-board mountable N 3 differential, dual, input voltage ranges N Single +5V supply or 9V battery N User-selectable decimal point placement N Low-battery "BAT" annunciator N 0 to +50°C temperature range N Low Cost SIMPLIFIED SCHEMATIC DIAGRAM Ḥ (+) INPUT HI (–) INPUT LO ANALOG COMMON REFERENCE IN/OUT +5V SUPPLY/ +BATTERY DP 1 DP 2 DP 3 DC/DC CONVERTER 5V RETURN/ –BATTERY +5V –5V +5V 1.23V REF. z+2.2V DATA A/D CONVERTER

0 Vdc

0.01μF BAT ~R1 = 100k on ±200mV/±2V (-0/1) models and 909k on all other models. R2 is not used on ±200mV/±2V (-0/1) models. R2 = 101k on ±2V/±20V (-1/2) models and 9.2k on ±20V/±200V (-2/3) models. HOLD/ BACKLIGHT BAT DC/DC converter is not used on 9V-powered models, J1 is connected. RANGE SELECT DP 4 €Hold function is not available on backlit models.

4½ Digit, LCD Display Digital Panel Voltmeters MPM_DMS40LCD.C02 Page 2 of 6 Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000www.murata-ps.com 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 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. 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 SUPPL Y/+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 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 M7 DMS-40LCD-1/2 0.8 1 – M7 DMS-40LCD-2/3 0.8 1 – M7 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 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

Ordering Information

Operating Temperature 0 – +50 °C Storage Temperature –20 – +75 °C Humidity (non-condensing) 0– 9 5 % Case Material Polycarbonate Weight 0.75 ounces (21 grams)

4½ Digit, LCD Display Digital Panel Voltmeters MPM_DMS40LCD.C02 Page 3 of 6 Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000www.murata-ps.com

APPLICATIONS

  1. Single-Ended Input Configurations: True single-ended measure- ments can only be made with 5V-powered meters. The circuit of Figure 2 avoids problems normally associated with ground loop currents. Separate ground runs should be used for 5V RETURN (pin 3) and (–) INPUT LO (pin 12). DMS-40LCD meters are available in either 5V-powered or 9V-powered models. 9V devices operate directly from 7.5V to 14V supplies (usually batteries) without the need for external voltage regulators. 9V devices, however, can not be used to measure voltages referenced to the negative battery terminal (pin 3) because the minus input to the meter (pin 12, (–) INPUT LO) must always be at least 1.5V above pin 3. 9V-powered meters can only be used to make differential and not single-ended measurements. 5V-powered devices operate from any well-regulated +5V supply and will accurately measure voltages both above and below pin 3 (5V RETURN) in either single-ended or differential configurations. 8. Soldering Methods: All models in the DMS-40LCD Series easily withstand most common wave soldering operations. We recommend, however, you evaluate the effects your particular soldering techniques may have on the meter’s plastic case and high-precision electrical performance. We recommend the use of water-soluble solders and thorough cleaning procedures. 9. Suggested Mating Connectors: Panel mounted: Connector housing DATEL P/N 39-2079400 Terminal type DATEL P/N 39-2099090 Crimping tool DATEL P/N 39-2099000 Wire size 22 to 26 AWG Insulation diameter 0.062” (1.57mm) maximum Stripping length 0.100 to 0.125” (2.54 to 3.17mm) Board mounted: Socket DATEL P/N 39-2359625 In any backlit application, including those with supply voltages < 9.2V, the current drawn by the backlight (and therefore the current drawn by the meter) can be reduced by installing a 1/4 Watt resistor between pins 3 and 9. The brightness of the backlight will be reduced proportionately. 5. ANALOG COMMON (Pin 10): This pin is connected to an internal, low-noise, “relative” ground. It is used in certain “floating” measure- ments 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. 6. REFERENCE IN/OUT (Pin 7): This pin accesses the meter’s internal reference and is used during the factory calibration procedure. Pin 7 should be left open in most common applications. It can be used in certain “ratiometric” applications in which it is desireable for the meter’s reference to track an external reference. See the Applications section of the DATEL Panel Meter Catalog for more details. 7. Gain Adjust: There is a gain-adjust potentiometer on the back of each meter. It has approximately ±150 counts of adjustment range. Since these devices essentially have no zero/offset errors, a gain adjustment is effectively an overall accuracy adjustment. Though they may be performed at any point (except zero), accuracy adjustments are most effective when performed with higher level input signals. R Series = Ohms+12.6 – 9.2V 0.035 RSeries = Ohms+BATTERY – 9.2V 0.035 Example: If +BATTERY (pin 1 with respect to pin 3) is +12.6V, RSeries = 97 Ohms

Figure 2. Single-Ended Input Configuration

  1. Low Battery Annunciator: The “BAT” annunciator in the upper

supply voltage for 9V-powered models falls below approximately 7.2V. This function can not be disabled.

  1. HOLD/BACKLIGHT (Pin 9) Function: For non-backlit models, con-

–BATTERY) will hold (continuously display) the last reading. If not used, pin 9 should be left open for these models.

4½ Digit, LCD Display Digital Panel Voltmeters MPM_DMS40LCD.C02 Page 6 of 6 Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without notice. © 2008 Murata Power Solutions, Inc. USA: Mansfield (MA), Tel: (508) 339-3000, email: sales@murata-ps.com Canada: Toronto, Tel: (866) 740-1232, email: toronto@murata-ps.com UK: Milton Keynes, Tel: +44 (0)1908 615232, email: mk@murata-ps.com France: Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: france@murata-ps.com Germany: München, Tel: +49 (0)89-544334-0, email: munich@murata-ps.com Japan: Tokyo, Tel: 3-3779-1031, email: sales_tokyo@murata-ps.com Osaka, Tel: 6-6354-2025, email: sales_osaka@murata-ps.com China: Shanghai, Tel: +86 215 027 3678, email: shanghai@murata-ps.com Guangzhou, Tel: +86 208 221 8066, email: guangzhou@murata-ps.com Singapore: Parkway Centre, Tel: +65 6348 9096, email: singapore@murata-ps.com Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356 www.murata-ps.com email: sales@murata-ps.com ISO 9001 and 14001 REGISTERED Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000www.murata-ps.com 11/25/08 MECHANICAL SPECIFICATIONS MECHANICAL DIMENSIONS: Inches (mm) TOLERANCES: 2 PL DEC ±0.02 (±0.51) 3 PL DEC ±0.010 (±0.254) LEAD DIMENSIONS: 0.025 (0.635) x 0.025 (0.635) NOMINAL RECOMMENDED PC BOARD FINISHED HOLE DIAMETER: MADE IN USA BEZEL INSTALLATION PANEL BEZEL #2-56 INSERT 0.156 (3.96) DEEPFRONT VIEW 1.270 (32.26) 0.187 (4.75) 2.35 (59.69) 2.118 (53.80) 0.093 (2.362) DIAMETER (4 REQUIRED) ONLY WHEN USING OPTIONAL BEZEL ASSEMBLY RECOMMENDED DRILL AND PANEL CUTOUT DIMENSIONS INTERNAL CORNER RADII: 0.032 (0.81) MAX. 1.07 (27.18) 0.878 (22.30) 0.096 (2.44) 0.116 (2.95) 2.55 (64.77) PANEL CUTOUT RETAINING CLIP INSTALLATION PANEL MADE IN USA DMS-40LCD-X/X-XX FRONT VIEW +5V SUPPLY/ +BATTERY RANGE SELECT 5V RETURN/ –BATTERY DP3 DP2 DP1 (–) INPUT LO (+) INPUT HI ANALOG COMMON HOLD/BACKLIGHT DP4 REFERENCE IN/OUT DP1 DP2 DP3 DP4 2.17 (55.1) 2.09 (53.1) 1.80 (45.7) 0.25 (6.4) TYP. 0.15 (3.7) TYP. 0.10 (2.5) TYP. 0.040 (1.02) 0.17 (4.3) TYP. 0.50 (12.7) 0.84 (21.3) 0.92 (23.4) PIN #1 IDENTIFIER 0.430 (10.92) STANDARD 0.560 (14.22) BACKLIT 0.040 (1.02) 0.325 (8.26) 0.290 (7.37) PIN 1 CALIBRATION POTENTIOMETER HOLE LOCATION 0.125 (3.175) DIAMETER (USE ONLY WHEN PC BOARD MOUNTING) 0.040 (1.02) BEZEL INSTALLATION AND RECOMMENDED DRILL AND PANEL CUTOUT