DMS-20PC 查看數據表（PDF） - DATEL Data Acquisition products
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DMS-20PC
DATEL Data Acquisition products
DMS-20PC Datasheet PDF : 6 Pages
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DMS-20PC
3½ D I G I T, L E D D I S P L AY D I G I TA L PA N E L V O LT M E T E R S
Performance/Functional Specifications
Typical at TA = +25°C and supply voltage = +5V using the single-ended input circuit,
unless otherwise noted.
Analog Inputs
Full Scale Input Range:
DMS-20PC-0
DMS-20PC-1
DMS-20PC-2
DMS-20PC-3
Input Impedance:
DMS-20PC-0, -1
DMS-20PC-2, -3
Overvoltage Protection
Common Mode Voltage Range
CMRR (dc to 60Hz)
Control Inputs
Decimal Point Placement (Pins 4-6)
Display Test (Pin 9)
Display Hold (Pin 9)
Performance
Sampling Rate
Accuracy (3 minute warm-up):
DMS-20PC-0 (VIN = +0.19V)
DMS-20PC-1 (VIN = +1.9V)
DMS-20PC-2 (VIN = +19V)
DMS-20PC-3 (VIN = +190V)
Zero Reading (VIN = 0 Volts)
Temperature Drift (0 to +60°C)
Power Supply Requirements
Supply Voltage
Supply Current:
DMS-20PC-X-RS
DMS-20PC-X-RL
DMS-20PC-X-AS
DMS-20PC-X-GS
DMS-20PC-X-OS
DMS-20PC-X-YS
DMS-20PC-X-RS-H
DMS-20PC-X-RH
Display
Display Type and Size
Polarity Indication
Overrange Indication
Physical/Environmental
Operating Temperature
Storage Temperature
Humidity (Non-condensing)
Case Material
Weight
Min. Typ. Max. Units
--
±200
--
mV
--
±2
--
Volts
--
±20
--
Volts
--
±200
--
Volts
100
1000
--
MΩ
0.8
1
--
MΩ
--
--
±250 Volts
--
--
±2
Volts
--
86
--
dB
Tie to pin 3 to activate
Tie to pin 3 to activate all segments
Tie to pin 3 to hold last reading
2.5 samples per second
--
±1
--
±1
--
±2
--
±2
"– 001" "000"
--
±0.2
±3 Counts
±3 Counts
±3 Counts
±3 Counts
"001"
±0.4 Cnts/°C
+4.75 +5.00 +5.25 Volts
--
+60
+90
mA
--
+7
+12
mA
--
+90
+120
mA
--
+90
+120
mA
--
+90
+120
mA
--
+90
+120
mA
--
+60
+90
mA
--
+60
+90
mA
3½ Digit LED, 0.37"/9.4mm high
Autopolarity ("–" for negative VIN)
"–1_ _ _ " for negative VIN
"1_ _ _" for positive VIN
0
--
+60
°C
– 40
--
+75
°C
0
--
95
%
Polycarbonate
0.4 ounces (11 grams)
Applies for transient or continuous overvoltages applied to (+) INPUT HI (pin 11) with
(–) INPUT LO (pin 12) at 0 Volts. Pin 12 is not overvoltage protected. Voltages
applied to pin 12 should not exceed the supply voltage.
See Technical Notes.
The DISPLAY HOLD function is optional on standard red LED models only.
See Ordering Information.
Ordering Information
DMS-20PC - 1 - RS
Input Range:
0 = ±200mV
1 = ±2V
2 = ±20V
3 = ±200V
Leave blank for standard
models.
Add -H for DISPLAY
HOLD option (available
on standard red LED
models only).
LED Color:
AS = Standard Amber
GS = Standard Green
OS = Standard Orange
RS = Standard Red
YS = Standard Yellow
RH = High-Intensity Red
RL = Low-Power Red
Accessories:
DMS-20-CP
DMS-BZL3
DMS-BZL4
DMS-EB2
Panel cutout punch
DMS-20 bezel assembly
DMS-20 bezel assembly with sealing gasket
Application/evaluation board with standard
MOLEX connector, decimal point solder pads
and attenuation resistor pads.
Technical Notes
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 specifications.
2. ANALOG COMMON (Pin 10): This pin is connected to an internal,
low-noise, "relative" ground. It is used in certain differential and
"floating" measurements as described in the Applications section
of this data sheet and 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-RL +0.05V max.
0.7mA max.
All Others
+0.4V max.
6mA max.
* The driving gates must be able to sink this much current
(IOL) with a logic "0" output.
2
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