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DMS20LCD35 Datasheet(PDF) 2 Page - List of Unclassifed Manufacturers

Part # DMS20LCD35
Description  3 1/2 Digit, LCD Display Low-Cost, Subminiature Digital Panel Voltmeters
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Manufacturer  ETC1 [List of Unclassifed Manufacturers]
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DMS20LCD35 Datasheet(HTML) 2 Page - List of Unclassifed Manufacturers

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2
DMS-20LCD
3 ½
DIGIT ,
LCD
DISPLA Y DIGIT A L P ANEL
VOL TMETERS
Performance/Functional Specifications
Typical at TA = +25°C and supply voltage = +5V (using the single-ended input circuit) or +9V
(using the differential 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 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 above –BATTERY (pin 3) and at least
1.5V below +BATTERY (pin 1).
➂ See Technical Notes.
Leave blank for standard
models.
Add B for backlit models.
DMS-20LCD - 1 - 5
Accessories:
DMS-20-CP
Panel cutout punch
DMS-BZL3
DMS-20 bezel assembly
DMS-BZL4
DMS-20 bezel assembly with sealing gasket
DMS-EB2
Application/evaluation board with standard
MOLEX connector, decimal point solder
pads and attenuation resistor pads.
DMS-PS1-CM
+5V/1.0A AC/DC power supply module
Input Range:
0 = ±200mV
1 = ±2V
2 = ±20V
3 = ±200V
Power Source:
5 = +5V
9 = +9V
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 Ap Note 3 of the DATEL
Panel Meter Catalog. Pin 10 should not be connected to pin 3
(5V RETURN/–BATTERY) 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/
–BATTERY). Unused decimal point location pins should be left
open. For 5V-powered models, the decimal location pins are TTL
compatible and may be hard wired as described above or driven
with 5V TTL logic gates.
Ordering Information
A panel-mount retaining clip is supplied with each model.
Analog Inputs
Min.
Typ.
Max.
Units
Full Scale Input Range:
DMS-20LCD-0
--
±200
--
mV
DMS-20LCD-1
--
±2
--
Volts
DMS-20LCD-2
--
±20
--
Volts
DMS-20LCD-3
--
±200
--
Volts
Input Impedance:
DMS-20LCD-0, -1
100
1000
--
M
DMS-20LCD-2, -3
0.8
1
--
M
Overvoltage Protection: ➀
DMS-20LCD-0, -1, -2
--
--
±100
Volts
DMS-20LCD-3
--
--
±250
Volts
Common Mode Voltage Range ➁
--
--
±2
Volts
CMRR (dc to 60Hz)
--
86
--
dB
Control Inputs ➂
Decimal Point Placement (Pins 4-6):
Functionality
Tie to pin 3 to activate
Logic Compatibility
TTL (on 5V-powered models)
Backlight (Pin 9)
Tie to pin 3 to turn on backlight
Performance
Sampling Rate
2.5 samples per second
Accuracy (1 minute warm-up):
DMS-20LCD-0 (VIN = +0.19V)
--
±1
±2
Counts
DMS-20LCD-1 (VIN = +1.9V)
--
±1
±2
Counts
DMS-20LCD-2 (VIN = +19V)
--
±2
±3
Counts
DMS-20LCD-3 (VIN = +190V)
--
±2
±3
Counts
Zero Reading (VIN = 0 Volts)
"– 001"
"000"
"001"
Temperature Drift (0 to +60°C)
--
±0.2
±0.4
Cnts/°C
Power Supply Requirements (5V Models)
Supply Voltage
+4.75
+5.00
+5.25
Volts
Supply Current:
Standard Models
--
+400
+600
µA
Backlit Models
--
+35
+50
mA
Power Supply Requirements (9V Models)
Supply Voltage
+7.5
+9.0
+14.0
Volts
Supply Current:
Standard Models
--
+230
+350
µA
Backlit Models
--
+35
+50
mA
Display
Display Type and Size
3½ Digit LCD, 0.37"/9.4mm high
Polarity Indication
Autopolarity ("–" for negative VIN)
Overrange Indication
"–1_ _ _ " for negative VIN
"1_ _ _ " for positive VIN
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)
Order on-line at www.datel.com


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