DMS-20PC Series www.murata-ps.com 3 Digit, LED Display, Low-Cost, Subminiature Digital Panel Voltmeters FEATURES DMS-20PC Series, 3 Digit, LED Display, Digital Panel Voltmeters combine a preci- sion A/D converter a factory-trimmed, highly stable, voltage reference and a large Lowest-cost LED meters (0.37 /9.4mm), easy-to-read LED display in a single package that is only slightly larger Subminiature size: than the display itself. Displays are offered in either red, orange, amber, yellow, green or 1.38 x 0.88 x 0.48 (35mm x 22mm x 12mm) blue colors. High-intensity and low-power (35mW total) red LEDs are also optional. Large (0.37 /9.4mm) LED display These low-cost meters are fully self-contained and fully functional. Their subminiature (1.38 x 0.88 x 0.48 ), epoxy-encapsulated cases incorporate built-in color lters and Choice of 6 LED colors bezels are moisture and vibration proof and function well in the harshest environments. High-intensity or low-power (7mA) red LEDs optional Their 12-pin, dual-in-line con guration offers component-like, plug-in convenience and Epoxy-encapsulated, 12-pin DIP package with built-in maximum versatility. Operating temperature range is 0 to +60C. color lter and bezel The meters come with one of four, differential, input voltage ranges: 200mV, 2V 20V or 200V. Input impedance is a minimum 800k. CMRR is typically 86dB (dc to 4 differential input voltage ranges 60Hz), and CMV is 2V. Input overvoltage protection (on the non-inverting input) is 250V. Factory calibrated, 1 count accuracy Devices are fully calibrated at the factory to an accuracy of 1 count (0.05% of full scale Single +5V power supply range) and never require calibration or adjustment. A DISPLAY ENABLE function permits the display to be disabled forpower-dow User-selectable decimal point placement operation. All models have a DISPLAY TEST function. Standard red LED models offer an DISPLAY ENABLE function forpower-dow mode optional DISPLAY HOLD function. DISPLAY TEST and HOLD (optional) functions Small size, low cost and adjustment-free reliability make the DMS-20PC Series the best choice for all your 3 digit, LED, DPM applications. 0 to +60C temperature range SIMPLIFIED SCHEMATIC DIAGRAM +5V 1 12 V+ +5V SUPPLY () INPUT LO 1 2 R2 0.01 5V F 2 R1 1111 DC/DC DISPLAY (+) INPUT HI CONVERTER ENABLE V 909k +2.0V 3 10 A/D ANALOG 5V RETURN CONVERTER COMMON 0 Vdc DATA 3 4 9 DISPLAY DP 3 TEST/HOLD 8 5 DP 2 +5V REFERENCE OUT 6 7 DP 1 REFERENCE IN 1 2 R2 is not used on 200mV (-0) models or 2V (-1) models. Only used on 200mV (-0) and 2V (-1) models. R2 = 100k on 20V (-2) models and 9.1k on 200V (-3) models. 3 Pin 9 is DISPLAY TEST on all but eight models. On those models (-H option), it is DISPLAY HOLD. For full details go to Figure 1. DMS-20PC Series simpli ed schematic www.murata-ps.com/rohs www.murata-ps.com/support MPM DMS 20PC.F01 Page 1 of 6 New Low-power blue and green LEDsDMS-20PC Series 3 Digit, LED Display, Low-Cost, Subminiature Performance/Functional Speci cations Digital Panel Voltmeters Typical at TA = +25C and supply voltage = +5V using the single-ended input circuit, unless otherwise noted. Analog Inputs Min. Typ. Max. Units Ordering Information Full Scale Input Range: DMS-20PC - 1 - RS -C DMS-20PC-0 200 mV Add -C for RoHS DMS-20PC-1 2 Volts Input Range: 0 = 200mV Leave blank for standard DMS-20PC-2 20 Volts 1 = 2V models. DMS-20PC-3 200 Volts 2 = 20V Add -H for DISPLAY HOLD 3 = 200V option (available on Input Impedence: standard red and green DMS-20PC-0, -1 1000 M LED models only). DMS-20PC-2, -3 1 M LED Color: AS = Standard Amber RS = Standard Red 250 Volts Overvoltage Protection BS = Standard Blue YS = Standard Yellow Common Mode Voltage Range 2 Volts GS = Standard Green RH = High-Intensity Red OS = Standard Orange RL = Low-Power Red CMRR (dc to 60Hz) 86 dB BL = Low-Power Blue Performance PGL = Low-Power Green Sampling Rate 2.5 reading per second Accessories: DMS-20-CP Panel cutout punch Accuracy (3 minute warm-up): DMS-BZL3-C DMS-20 bezel assembly DMS-20PC-0 (Vin = +0.19V) 1 3 Counts DMS-BZL4-C DMS-20 bezel assembly with sealing gasket DMS-20PC-1 (Vin = +1.9V) 1 3 Counts DMS-EB2-C Application/evaluation board with standard MOLEX connector, decimal point solder pads and attenuation DMS-20PC-2 (Vin = +19V) 2 3 Counts resistor pads. DMS-20PC-3 (Vin = +190V) 2 3 Counts A panel-mount retaining clip is supplied with each model. Zero Reading (Vin = 0 Volts) 001 000 001 See www.murata-ps.com/dpm-availability for model-speci c availability. Temperature Drift (0 = +60C) 0.2 0.4 Cnts/C Power Supply Requirements Supply Voltage +4.75 +5.00 +5.25 Volts TECHNICAL NOTES Supply Current: RoHS Compliant Parts: Add- suf x to part number. 1. REFERENCE OUTPUT (Pin 8) and INPUT (Pin 7): Pin 8 is a precision DMS-20PC-X-RL +7 +12 mA reference actively trimmed at the factory. In normal operation, pin 8 DMS-20PC-X-BL & -PGL +12 +17 mA must be tied to pin 7 to achieve all listed accuracy and drift speci ca- DMS-20PC-X-RS, -RH +60 +90 mA tions. DMS-20PC-X-RS-H +60 +90 mA 2. ANALOG COMMON (Pin 10): This pin is connected to an internal, DMS-20PC-X-BS +75 +100 mA low-noise,relativ ground. It is used in certain differential and DMS-20PC-X-GS-H +90 +120 mA oatin measurements as described in the Applications section DMS-20PC-X-AS, -GS, -OS, -YS +90 +120 mA of this data sheet and Ap Note DMS-AN3 at