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DPM 1 AS-BL
3? Digit Backlit LCD Voltmeter Module
PRODUCT DESCRIPTION
The DPM 1 AS-BL features a 200mV d.c. measurement range with auto-zero and auto-polarity. Decimal points are user
selectable. The DPM 1AS-BL features a negative rail generator which enables the meter to measure a signal referenced
to its own power supply GND. LED backlighting ensures excellent readability under low light conditions. The design
of the panel meter's housing allows the module to be easily snapped into a panel. The module's low cost means it will
suit high and low volume applications. The DPM 1AS-BL is intended to replace the DPM 1, DPM 1S, DPM 1-BL and
DPM 1S-BL in many applications, usually requiring only minor circuit modifications.
FEATURES
? 5.5 mm (0.22") Digit Height
? 200mV d.c. Full Scale Reading
? 3.0 to 7.5V or 6.0 to 15.0V Operation
? Auto-zero and Auto-polarity
? Programmable Decimal Points
? LED Backlighting
TYPICAL APPLICATIONS
? Precision Instrumentation Systems
? Power Supply Monitoring
? Hand held instruments
? Panel-Mount Indication
? Low Power Voltage Measurement
ELECTRICAL SPECIFICATIONS
ORDERING INFORMATION
Stock Number
Standard Mete r DPM 1 AS-BL
Specification Min. Typ. Max.
Accuracy (overall error) * 0.1
Linearity ±1
Sample rate 2.5
Operating temperature range 0 50
Temperature stability 250
Meter supply voltage V+ to GND configuration 3.0 5.0 7.5
V+ to V- configuration 6.0 9.0 15.0**
Meter supply current V+ to GND configuration 350
V+ to V- configuration 175
Backlight supply voltage 4.75 5.0 ***
Backlight supply current @ 5V d.c. 15 30****
Input leakage current (Vin = 0V) 1 10
Unit
% (±1 count)
count
samples/sec
°C
ppm/°C
V d.c.
V d.c.
μ A
μ A
V d.c.
mA
pA
* To ensure maximum accuracy, re-calibrate periodically.
** Operation of the meter beyond the maximum supply voltage rating may cause permanent damage to the meter.
*** An external series resistor is required above 5V, see Applications.
**** This specification linearly derates to 20mA @ 50°C.
Unless otherwise noted, specifications apply at T A =25°C, V supply =5Vd.c. (f clock =48kHz) and are tested with the module configured for single ended
input mode.
SAFETY
To comply with the Low Voltage Directive (LVD 93/68/EEC), input voltages to the module’s pins must not exceed
60Vdc. The user must ensure that the incorporation of the panel meter into the user ’s equipment conforms to the
relevant sections of BS EN 61010 (Safety Requirements for Electrical Equipment for Measuring, Control and
Laboratory Use).
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