OEM33 3.5 digit LCD digital voltmeter
features
Panel cut out 40.5 x 22.5
Fastening clips accept panel thickness 0.9 to 3.2mm
The OEM33 has a built in digital display hold facility. For
normal, continuous operation connect the 'Hold 1' pin to
the GD pin. To hold the present reading, connect 'Hold 1'
to VDD. Do not leave this pin floating or it will drift in and
out of hold mode.
The OEM33 is one of the world's smallest digital
voltmeters. It is an ideal replacement for analogue meters
with advantages of accuracy, size and easy mounting.
The module includes an A/D converter, LCD display of
10mm character height, and plastic housing with standard
dual in line pin terminals for easy insertion into sockets or
PC Board.
OEM33
DIMENSIONS
OPERATING SPECIFICATION
ORDERING INFORMATION
DESCRIPTION
Revision - 14 27/08/04
Operating temperature
Storage temperature
Operating relative humidity
DISPLAY HOLD FACILITY
digital panel modules
3.5 Digit 10mm character height LCD
200mV Full Scale sensitivity
Automatic zeroing and polarity indication
11 selectable annunciators
Easy to use decimal point selection
Built in snap fastener
Display hold feature standard
3.5 digit, 200mV LCD Voltmeter
0 to 50
-20 to 70
80%
user guide
O
C
mm
O
C
All annunciators not in use must be connected to the BP
pin for suppression purposes. To light up an annunciator,
connect the corresponding pin to XBP.
Supply voltage (VDD)
Supply Current (IDD)
Full scale
Input Impedance
Reference Voltage
Overload voltage
Zero I/P Reading
Accuracy
at FSD
Linearity
Resolution
CMRR
Temp Coefficient
m, µ, MΩ, KΩ,
V, A, HOLD2
ELECTRICAL CHARACTERISTICS T
PIN FUNCTIONS
VDD
VSS
GD
IH
IL
RH
RL
HOLD1
C
XBP
BP
D1, D2, D3
BAT,
CHARACTERISTIC
o
C,
o
F,~,
Positive supply terminal
Negative supply terminal for 9 volts operation
Negative supply terminal for 5 volts operation
Input high terminal
Input low terminal
Reference high input terminal
Reference low input terminal
Connect to VDD for hold and GD for continuous
Analogue Common
For driving annunciator
LCD back plane
Decimal point pins . D1 = .000, D2 = 0.00 D3 = 00.0
The decimal point will appear if the corresponding
terminal is connected to XBP.
Annunciators
CONDITION
9 Volts
5 Volts
9 Volts
5 Volts
9 Volts
9 Volts
5 Volts
9 Volts
5 Volts
MIN
100
4.5
7
TYP
500
100
100
100
+2
+2
+1
+1
70
A
9
5
0
=25
O
199.9
MAX
900
150
C¡
10
20
+1
+4
+4
+2
+2
6
5
ppm/
Counts
Counts
Counts
Counts
Counts
UNITS
mA
mV
M
mV
µA
µV
dB
V
V
V
Ω
o
C