Datasheet
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 The DISPLAY HOLD function is optional on standard red and green LED models only.
Leave blank for standard
models.
Add -H for DISPLAY HOLD
option (available on
standard red and green
LED models only).
DMS-20PC - 1 - RS -C
LED Color:
AS = Standard Amber
BS = Standard Blue
GS = Standard Green
OS = Standard Orange
RS = Standard Red
YS = Standard Yellow
RH = High-Intensity Red
RL = Low-Power Red
BL = Low-Power Blue
PGL = Low-Power Green
Accessories:
DMS-20-CP Panel cutout punch
DMS-BZL3-C DMS-20 bezel assembly
DMS-BZL4-C DMS-20 bezel assembly with sealing gasket
DMS-EB2-C Application/evaluation board with standard
MOLEX connector, decimal point solder pads and attenuation
resistor pads.
Input Range:
0 = ±200mV
1 = ±2V
2 = ±20V
3 = ±200V
A panel-mount retaining clip is supplied with each model.
1. REFERENCE OUTPUT (Pin 8) and INPUT (Pin 7): Pin 8 is a precision
reference actively trimmed at the factory. In normal operation, pin 8
must be tied to pin 7 to achieve all listed accuracy and drift specifi ca-
tions.
2. ANALOG COMMON (Pin 10): This pin is connected to an internal,
low-noise, "relative" ground. It is used in certain differential and
"fl oating" 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) or to your
system’s analog ground.
3. Decimal Point Placement: The location of the decimal point is user-
selectable, and the decimal point control pins (DP1-DP3) are active
low functions. Select the appropriate decimal point by tying the
appropriate pin (pin 4, 5 or 6) to pin 3 (5V RETURN). Unused decimal
point location pins should be left open.
Hard wiring is preferable, however, you can use logic gates to
exercise dynamic control over the location of the decimal point if the
following drive conditions are met:
Model Applied "0" Voltage Load Current*
DMS-20PC-X-XL +0.05V max. 0.7mA max.
All Others +0.4V max. 6mA max.
* The driving gates must be able to sink this much current
Analog Inputs Min. Typ. Max. Units
Full Scale Input Range:
DMS-20PC-0 – ±200 – mV
DMS-20PC-1 – ±2 – Volts
DMS-20PC-2 – ±20 – Volts
DMS-20PC-3 – ±200 – Volts
Input Impedence:
DMS-20PC-0, -1 – 1000 – MΩ
DMS-20PC-2, -3 – 1 – MΩ
Overvoltage Protection ➀
– – ±250 Volts
Common Mode Voltage Range – – ±2 Volts
CMRR (dc to 60Hz) –86–dB
Performance
Sampling Rate 2.5 reading per second
Accuracy (3 minute warm-up):
DMS-20PC-0 (Vin = +0.19V) – ±1 ±3 Counts
DMS-20PC-1 (Vin = +1.9V) – ±1 ±3 Counts
DMS-20PC-2 (Vin = +19V) – ±2 ±3 Counts
DMS-20PC-3 (Vin = +190V) – ±2 ±3 Counts
Zero Reading (Vin = 0 Volts) “–001” “000” “001”
Temperature Drift (0 = +60°C) – ±0.2 ±0.4 Cnts/°C
Power Supply Requirements
Supply Voltage +4.75 +5.00 +5.25 Volts
Supply Current:
DMS-20PC-X-RL – +7 +12 mA
DMS-20PC-X-BL & -PGL – +12 +17 mA
DMS-20PC-X-RS, -RH – +60 +90 mA
DMS-20PC-X-RS-H – +60 +90 mA
DMS-20PC-X-BS – +75 +100 mA
DMS-20PC-X-GS-H – +90 +120 mA
DMS-20PC-X-AS, -GS, -OS, -YS – +90 +120 mA
Display
Display Type and Size 3½ digit, 0.37"/9.4mm high LED
Polarity Indication Autopolarity ("–" for negative Vin)
Overrange Indication "–1_ _ _ " for negative inputs
"1_ _ _ " for positive inputs
Physical/Environmental
Operating Temperature 0 – +60 °C
Storage Temperature –20 – +75 °C
Humidity (non-condensing) 0 – 95 %
Case Material Polycarbonate
Weight 0.4 ounces (11 grams)
Performance/Functional Specifi cations
Typical at TA = +25°C and supply voltage = +5V using the single-ended input circuit,
unless otherwise noted.
Ordering Information
RoHS Compliant Parts: Add "-C" suffi x to part number.
Add -C for RoHS
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DMS-20PC Series
3½ Digit, LED Display, Low-Cost, Subminiature
Digital Panel Voltmeters
MPM_DMS_20PC.D07 Page 2 of 6
TECHNICAL NOTES