Datasheet

Performance/Functional Specifications
Typical at TA = +25°C and supply voltage = +5V using the single-ended input
circuit, unless otherwise noted.
➀ 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.
➁ See Technical Notes.
➂ BCD outputs are optional and must be specified in the part number.
See Ordering Information.
➃ Includes high-intensity and BCD-output models.
1. ANALOG COMMON (Pin 10): This pin is an internal, low-noise
ground for the DMS-40PC. It is internally connected to pin 3
(5V RETURN). Do not connect pin 10 to either pin 3 or your system
ground as this will create a ground loop and possibly result in errone-
ous readings.
2. REFERENCE INPUT/OUTPUT (Pin 7): This pin accesses the meter’s
internal reference and is used during the factory calibration proce-
dure. Pin 7 should be left open in most common applications. It can
be used in certain “ratiometric” applications in which it is desirable
for the meter’s reference to track an external reference. See Ap Note
3 in the DATEL Panel Meter Catalog for more details.
3. DISPLAY TEST (Pin 2): Connecting pin 2 to ground (pin 3, 5V
RETURN) will activate all LED segments, and the display will read
“–18888” regardless of the actual applied input. To reduce self-heat-
ing, the display should not be left in the “test” mode for more than 10
seconds. This pin should be left open if unused.
Analog Inputs Min. Typ. Max. Units
Full Scale Input Range:
DMS-40PC-1 – ±2 – Volts
DMS-40PC-2 – ±20 – Volts
DMS-40PC-3 – ±200 – Volts
Input Impedence: –
DMS-40PC-1 100 1000 – MΩ
DMS-40PC-2, -3 0.8 1 – MΩ
Overvoltage Protection ➀
– – ±250 Volts
Common Mode Voltage Range – – ±2 Volts
CMRR (dc to 60Hz) – 86 – dB
Control Inputs ➁
Decimal Pt. Placement (Pins 4-6, 8) Tie to pin 3 to activate
Display Test (Pin 2) Tie to pin 3 to activate all segments
Display Hold (Pin 9) Tie to pin 3 to hold last reading
BCD Outputs ➂
Logic Levels (1 LSTTL load max.):
Logic “1” +2.4 – – Volts
Logic “2” – +0.4 +0.8 Volts
Performance
Sampling Rate 2.5 reading per second
Accuracy (3 minute warm-up):
DMS-40PC-1 (Vin = +1.9V) – ±2 ±3 Counts
DMS-40PC-2 (Vin = +19V) – ±3 ±4 Counts
DMS-40PC-3 (Vin = +190V) – ±3 ±4 Counts
Zero Reading (Vin = 0 Volts) “–001” “000” “001”
Temperature Drift (0 = +50°C)
DMS-40PC-1 – ±0.4 ±1 Cnts/°C
DMS-40PC-2, -3 – ±0.4 ±1.5 Cnts/°C
Power Supply Requirements
Supply Voltage +4.75 +5.00 +5.25 Volts
Supply Current:
Standard Models ➃
– +100 +140 mA
Low-Power Models – +35 +50 mA
Display
Display Type and Size 4½ digit, 0.52"/13.2mm high LED
Polarity Indication Autopolarity ("–" for negative Vin)
Overrange Indication "–0000" (flashing) for negative Vin
"0000" (flashing) for positive Vin
Physical/Environmental
Operating Temperature 0 – +50 °C
Storage Temperature –20 – +75 °C
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.
BCD Output Models:
BCD outputs are only available on the following red meters.
DMS-40PC-1-RS-BCD-C for ±2V input range
DMS-40PC-2-RS-BCD-C for ±20V input range
DMS-40PC-3-RS-BCD-C for ±200V input range
DMS-40PC-1-RL-BCD-C for ±2V input range
DMS-40PC-2-RL-BCD-C for ±20V input range
DMS-40PC-3-RL-BCD-C for ±200V input range
DMS-40PC - 1 - R S - C
LED Color:
GS = Standard Green
RH = High-Intensity Red
RL = Low-Power Red
RS = Standard Red
YS = Standard Yellow
Input Range:
1 = ±2V
2 = ±20V
3 = ±200V
A panel-mount retaining clip is supplied with each model.
Ordering Information
Add -C for RoHS
Humidity (non-condensing) 0 – 95 %
Case Material Polycarbonate
Weight 0.75 ounces (21 grams)
www.murata-ps.com/suppor t
DMS-40PC Series
4½ Digit, LED Display Digital Panel Voltmeters
09/27/11 MPM_DMS-40PC.C06 Page 2 of 6
TECHNICAL NOTES