DMS-20LCD 查看數據表（PDF） - Murata Power Solutions
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DMS-20LCD Datasheet PDF : 6 Pages
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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.
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 Impedence:
–
DMS-20LCD-0, -1
100 1000
–
M7
DMS-20LCD-2, -3
0.8
1
–
M7
Overvoltage Protection ~
DMS-20LCD-0, -1, -2
–
–
±100 Volts
DMS-20LCD-3
–
–
±250 Volts
Common Mode Voltage Range
–
–
±2 Volts
CMRR (dc to 60Hz)
–
86
–
dB
Control Inputs
Decimal Pt. Placement (Pins 4-6)
Tie to pin 3 to activate
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 reading per second
Accuracy (1 minute warm-up):
DMS-20PC-0 (Vin = +0.19V)
–
±1
±2 Counts
DMS-20PC-1 (Vin = +1.9V)
–
±1
±2 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 (5V Models)
Supply Voltage
+4.75 +5.00 +5.25 Volts
Supply Current:
Standard Models
– +400 +650 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, 0.37"/9.4mm high LCD
Polarity Indication
Autopolarity ("–" for negative Vin)
Overrange Indication
"–1_ _ _ " for negative Vin
"1_ _ _ " for positive Vin
www.murata-ps.com
DMS-20LCD Series
3½ Digit, LCD Display Digital Panel Voltmeters
Physical/Environmental
Operating Temperature
Storage Temperature
Humidity (non-condensing)
Case Material
Weight
0
–
+60
°C
–20
–
+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) properly connected. Pin 12 is not
overvoltage
protected (see Figure 1). Voltages applied to pin 12 should not exceed the
supply voltage.
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).
See Technical Notes.
Ordering Information
DMS-20LCD - 1 - 5 - C
Add -C for RoHS
Input Range:
0 = ±200mV
1 = ±2V
2 = ±20V
3 = ±200V
Accessories:
DMS-20-CP
DMS-BZL3-C
DMS-BZL4-C
DMS-EB2-C
Leave blank for standard
models.
Add B for backlit models.
Power Source:
5 = +5V
9 = +9V
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.
A panel-mount retaining clip is supplied with each model.
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 specifica-
tions.
2. ANALOG COMMON (Pin 10): This pin is connected to an internal,
low-noise, “relative” ground. It is used in certain differential and “float-
ing” 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
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
MPM_DMS20lcd.B03 Page 2 of 6
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