DMS-40LCD Series www.murata-ps.com 4 Digit, LCD Display Digital Panel Voltmeters Offering a unique combination of low cost, scienti c-grade accuracy (2 counts), FEATURES component-like convenience and outstanding reliability, DMS-40LCD Series 4 Digit DPMs Scienti c-grade accuracy, 2 counts provide the ultimate combination of price, precision and convenience. These miniature Low power, typically 12.5mW (2.17 x 0.92 x 0.43) digital voltmeters combine an advanced, autozeroing A/D converter, Miniature size: a precision reference circuit and a large (0.4/10.2mm high), easy-to-read LCD display in a 2.17 x 0.92 x 0.43 (55mm x 23mm x 11mm) single, fully encapsulated, 12-pin DIP package. All models incorporate a built-in bezel and are easily mounted in either panels or pc boards. Large (0.4/10.2mm), enhanced-contrast, LCD display Each DMS-40LCD meter has a dual-range, differential, input con guration Backlit displays optional (200mV/2V, 2V/20V or 20V/200V) and is available with a backlit or non-backlit Epoxy-encapsulated, 12-pin DIP display. Input impedance is a minimum 800k, and CMRR is typically 86dB (dc to 60Hz). CMV is 2V, and all models are overvoltage protected to 250V (on their non-inverting Panel or pc-board mountable inputs). 3 differential, dual, input voltage ranges All DMS-40LCD meters are fully functional and operate from a single +5V supply (draw- Single +5V supply or 9V battery ing 3.5mA max.) or a single 9V supply/battery (drawing 2.5mA max.). All models feature User-selectable decimal point placement autopolarity changeover and overrange indication. A display HOLD function is standard on all non-backlit models. Low-batteryBA annunciator Thanks to their rugged epoxy-based encapsulation and their advanced, factory-cal- 0 to +50C temperature range ibrated A/D converters, DMS-40LCD meters are able to withstand the harshest environ- Low Cost ments and never require adjustment or calibration. Plug-in convenience, long-term stability and wide operating temperature range (0 to +50C) make DMS-40LCD meters the right solution for any high-accuracy DPM requirement. SIMPLIFIED SCHEMATIC DIAGRAM +5V 1 V+ 12 +5V SUPPLY/ () INPUT LO +BATTERY R2 0.01F 5V R1 2 11 RANGE DC/DC (+) INPUT HI SELECT CONVERTER V +2.2V 10 A/D ANALOG 3 5V RETURN/ CONVERTER COMMON BATTERY 0 Vdc J1 1.23V DATA 4 REF. DP 3 BAT BAT 9 HOLD/ 5 BACKLIGHT DP 2 8 DP 4 6 +5V DP 1 7 REFERENCE IN/OUT R1 = 100k on 200mV/2V (-0/1) models and 909k on all other models. DC/DC converter is not used on 9V-powered models, For full details go to R2 is not used on 200mV/2V (-0/1) models. J1 is connected. www.murata-ps.com/rohs R2 = 101k on 2V/20V (-1/2) models and 9.2k on 20V/200V (-2/3) models. Hold function is not available on backlit models. www.murata-ps.com/support MPM DMS40LCD.D01 Page 1 of 6DMS-40LCD Series 4 Digit, LCD Display Digital Panel Voltmeters Performance/Functional Speci cations Typical at TA = +25C and supply voltage = +5V (using the single-ended input circuit) or +9V (using the differential input circuit), unless otherwise noted. Physical/Environmental Analog Inputs Min. Typ. Max. Units Full Scale Input Range: Operating Temperature 0 +50 C Storage Temperature 20 +75 C DMS-40LCD-0/1 200/2 mV/V Humidity (non-condensing) 0 95 % DMS-40LCD-1/2 2/20 V/V Case Material Polycarbonate DMS-40LCD-2/3 20/200 V/V Weight 0.75 ounces (21 grams) Input Impedence: DMS-40LCD-0/1 100 1000 M 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 DMS-40LCD-1/2 0.8 1 M differential or single-ended measurements. 9V-powered models can only be used for DMS-40LCD-2/3 0.8 1 M differential measurements. Overvoltage Protection 250 Volts 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 Common Mode Voltage Range 2 Volts (see Figure 1). Voltages applied to pin 12 should not exceed the supply voltage. CMRR (dc to 60Hz) 86 dB 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 Control Inputs above BATTERY (pin 3) and at least 1.5V below +BATTERY (pin 1). Decimal Pt. Placement (Pins 4-6, 8): See Technical Notes. Functionality Tie to pin 3 to activate Logic Compatibility TTL (on 5V-powered models) Hold/Backlight Functionally (Pin 9) Ordering Information Backlit Models Tie to pin 1 to activate Non-backlit Models Tie to pin 3 to hold reading DMS-40LCD - 0/1 - 5 -C Performance Add -C for RoHS Input Ranges: Sampling Rate 2.5 reading per second 0/1 = 200mV/2V Leave blank for standard Accuracy (1 minute warm-up): 1/2 = 2V/20V models. Add B for Power Source: DMS-40LCD-0/1 (Vin = +0.19/1.9V) 2 3 Counts 2/3 = 20V/200V backlit models. 5 = +5V 9 = +9V DMS-40LCD-1/2 (Vin = +1.9V) 2 3 Counts See www.murata-ps.com/dpm-availability for model-speci c availability. DMS-40LCD-1/2 (Vin = +19V) 3 4 Counts Accessories: DMS-40LCD-2/3 (Vin = +19/190V) 3 4 Counts DMS-30-CP Panel cutout punch Zero Reading (Vin = 0 Volts) 001 000 001 DMS-BZL1-C DMS-40 bezel assembly DMS-BZL2-C DMS-40 bezel assembly with sealing gasket Temperature Drift (0 = +50C) DMS-EB-C Application/evaluation board with standard DMS-40LCD-0/1 0.4 0.8 Cnts/C MOLEX connector, decimal point solder pads DMS-40LCD-1/2 0.6 1 Cnts/C and attenuation resistor pads. DMS-40LCD-2/3 0.6 1 Cnts/C A panel-mount retaining clip is supplied with each model. Power Supply Requirements (5V Models) Supply Voltage +4.75 +5.00 +5.25 Volts TECHNICAL NOTES Supply Current: 1. Input Voltage Range Selection: Each model in the DMS-40LCD Standard Models +2.5 +3.5 mA Series offers two, user-selectable, input voltage ranges as indicated Backlit Models +37 +45 mA in the Performance/Functional Speci cations Table and the Ordering Information. To select the higher range of any device (such as the 2V Power Supply Requirements (9V Models) range for the DMS-40LCD-0/1), connect pin 2 (RANGE SELECT) to Supply Voltage +7.5 +9.00 +14.0 Volts pin 1 (+5V SUPPLY/+BATTERY). To select the lower range, leave pin 2 Supply Current: open. Standard Models +1.5 +2.5 mA 2. Decimal Point Placement: The location of the decimal point is user- Backlit Models +37 +45 mA selectable, and the decimal point control pins (DP1-DP4) are active low Display 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- Display Type and Size 4 digit, 0.4 /10.2mm high LCD mal point location pins should be left open. For 5V-powered models, Polarity Indication Autopolarity for negative Vin) the decimal location pins are TTL compatible and may be hard wired as Overrange Indication1 for negative inputs described above or driven with 5V TTL logic gates.1 for positive inputs www.murata-ps.com/support MPM DMS40LCD.D01 Page 2 of 6