OEM22 Datasheet, PDF (1/2 Pages) List of Unclassifed Manufacturers – OEM22 and OEM24L (backlit) 3.5 digit LCD digital voltmeters

digital panel modules
user guide
OEM22 and OEM24L (backlit) 3.5 digit LCD digital voltmeters
features
3.5 Digit 12.7mm character height LCD
200mV full scale sensitivity
Automatic zeroing and polarity indication
Low battery indication (For 9V option only)
10 selectable annunciators
Easy to use decimal point selection
Display Hold as standard
DESCRIPTION
The OEM22 is a neat "flat pack" voltmeter module that
can either be sub-panel mounted or used with the
optional MB11 fixing bezel. The module is set up for 9 volt
operation but can be adjusted for 5V use. A low BAT
annunciator is provided as standard (9Vonly). The
OEM24L version comes complete with a green LED
backlight. All versions now come with display hold feature.
DIMENSIONS
mm
ELECTRICAL CHARACTERISTICS T_A=25^OC¡
CHARACTERISTIC CONDITION MIN TYP MAX
Supply voltage
(VDD)
9 volts
7
9
10
5 volts
4.8
5
6
Supply Current
(IDD)
9 Volts
5 Volts
500 900
5
Full scale
199.9
Input impedance
100
Ref voltage ROH
9 Volts
100
Overload voltage
20
Zero I/P Reading
0
+1
Accuracy
at FSD
9 volts
5 volts
+1
+2
+1
+4
Resolution
100
CMRR
70
Temp Coefficient
100 150
Low Battery Ind.
9 Volts only 6.75 7.25 7.75
Backlight Volts
OEM24L
5
Backlight Current
at 5V
-
40
60
UNITS
Volts
Volts
µA
mA
mV
MΩ
mV
Volts
Count
Counts
Counts
µV
dB
ppm/ ^oC
V
V
mA
OPERATING SPECIFICATION
Operating temperature
Storage temperature
Operating relative humidity
0 to 50^OC
-20 to 70^OC
80%
ORDERING INFORMATION
OEM22 3.5 digit, 200mV LCD Voltmeter
OEM24L 3.5 digit, 200mV LCD Voltmeter with backlight
MB11 Optional mounting bezel
Revision 8 17/011/04
PIN FUNCTIONS
PIN
DESCRIPTION
VDD
Positive supply terminal
VSS
Negative supply terminal for 9 Volt mode only
INHI
INLO
Positive input terminal
Negative input terminal
RFH
RFL
ROH
ROL
Reference input high terminal
Reference input low terminal
Reference output high terminal
Reference output low terminal
HOLD
Con. to VDD for display hold, to TST for normal.
COM
Analogue common
Connect to VDD to test all segments (except
TST
annunciators), for a few seconds only. (9V mode)
Also negative supply terminal for 5V supply.
XBP
For driving annunciators
BP
LCD back plane.
D1, D2, D3
Decimal point select. The decimal point will
energize when these pins are tied to VDD.
AB,B3,E3,G3, For use with external auto-ranging circuit.
BAT,^oC,^oF,~,m,µ,M, Annunciators. See user instructions. BAT is auto
Ω,KΩ,V,A,HOLD ^{turn on. Turn it off in 5V mode by adjusting V2.}
LMP +
Backlight positive terminal (+5V DC) OEM24L
LMP -
Backlight negative terminal ( 0V DC) OEM24L