SP 100 LASCAR, SP 100 Datasheet - Page 3

• Manufacturer Part Number: SP 100
• Description: Voltage Meter
• Manufacturer: LASCAR

Specifications of SP 100

• No. Of Digits / Alpha: 3-1/2
• Meter Function: DC Voltmeter
• Meter Range: 0mV To 200mV
• Digit Height: 9.4mm
• Operating Temperature Range: 0°C To +50°C
• Meter Signal Input: Voltage
• Character Size: 0.37"
• No. Of Pins: 12
• Lead Free Status / RoHS Status: na

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.
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