SP100 Martel Electronics, SP100 Datasheet - Page 3

• Manufacturer Part Number: SP100
• Description: LED DPM 200MV 3.5 DIGIT RED
• Manufacturer: Martel Electronics
• Series: SPr
• Type: Voltmeterr

Specifications of SP100

• Measuring Range: 200mVDC
• Display Style: Red Characters, Black Background
• Display Type: LED
• Display Face Size: 1.38" L x 0.88" W (35.1 x 22.4mm)
• Display Digits: 3.5
• Display Digits - Height: 0.370" (9.40mm)
• Backlight: Red
• Mounting Type: Panel Mount
• Termination: PC Pins
• Voltage - Supply: 4.75 ~ 5.25V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 227-1050

SP 100
PIN FUNCTIONS
1.
2.
3.
4.
5.
6.
7.
8.
9.
10. COM Ground for analogue section of A/D converter.
11. INH
12. INL
Note:
A negative supply is generated internally and mirrors the positive supply. For example: if V+ is +5V, then
the internally generated V- is -5V. When measuring with the input referenced to the same supply rail as
that of the panel meter, then the limitations on the input range are (V- + 1.5V) to (V+ - 1.5V).
CIRCUIT DIAGRAM
0V
V+
DE
0V
DP3
DP2
DP1
R I
RO
T
1
11
12
10
7
3
8
Positive power supply to the meter.
Display Enable. Connect to V+ for normal operation.
Do not connect to enter low power mode. The display is then blanked, but the voltmeter section
continues to operate. In low power mode, the current consumption is reduced to 400 A (typ).
0V power supply connection to the meter.
Connect to 0V to display DP3 (199.9).
Connect to 0V to display DP2 (19.99).
Connect to 0V to display DP1 (1.999).
Reference voltage input for the meter's A/D converter.
Precision reference voltage output. Connect to RI for normal operation.
Connect to V+ to test the display. All segments will be displayed, except for decimal points.
It is actively held at 3.05V (nom) below V+ and must not be allowed to sink excessive current
(>100 A) by, for instance, connecting to a higher voltage.
Positive measuring input.
Negative measuring input.
www.lascarelectronics.com
PO Box 770, Londonderry, NH 03053 1-800-821-0023
www.martelcorp.com
3½ Digit LED Voltmeter Module
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6
5
4
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