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DMS-40PC Series

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DMS-40PC Series
Actual Size
Features
+5V 1 +5V SUPPLY -5V 2 DISPLAY TEST DC / DC CONVERTER V- V+ R2
12 (-) INPUT LO 0.01µF
R1 909k
11 (+) INPUT HI 10 ANALOG COMMON
3 5V RETURN 0 Vdc
A / D CONVERTER 2.5V REF.
9 5 DP 2 8 DP4 6 DP 1 +5V 7 REFERENCE IN / OUT
DISPLAY HOLD
Figure 1. DMS-40PC Series Simplified Schematic
DATEL, Inc., Mansfield, MA 02048 (USA) · Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356 · Email: sales@datel.com · Internet: www.datel.com
DMS-40PC
Performance / Functional Specifications
Order on-line at www.datel.com
Ordering Information
DMS-40PC - 1 - R S
A panel-mount retaining clip is supplied with each model.
Technical Notes
Polycarbonate 0.75 ounces (21 grams)
Applies for transient or continuous overvoltages applied to (+) INPUT HI (pin 11) with (-) INPUT LO (pin 12) properly connected. Pin 12 is not overvoltage protected (see Figure 1). Voltages applied to pin 12 should not exceed the supply voltage. See Technical Notes. BCD outputs are optional and must be specified in the part number. See Ordering Information. Includes high-intensity and BCD-output models.
DMS-40PC
Applications
11 (+) IN HI
DMS-40PC-1-GS
12 (-) IN LO 1 +5V SUP 6 DP1 3 5V RET
120 VAC
DATEL UPA-5 / 500
AC to DC Converter
Figure 2. Single-Ended Input Configuration
DMS-40PC
Applications
LM2931T-5 IN OUT GND 4.5 - 18Vdc 22µF 10V
(+) IN HI 11 1 +5V SUP
DMS-40PC-2-RL
3 5V RET 5 DP2 12 (-) IN LO
Figure 4. 4.5-18V Power Supply Monitor
DMS-40PC-1-GS
11 (+) IN HI
DP1 12 (-) IN LO
1 +5V SUP
120 VAC
DATEL UPA-5 / 500
AC to DC Converter
Figure 3. Differential Input Configuration
11 (+) IN HI 10 ANA COMM 12 (-) IN LO
DMS-40PC-1-GS
1.5V CELL
1 +5V SUP
120 VAC
DATEL UPA-5 / 500
AC to DC Converter
Figure 5. Floating Input Measurements
DMS-40PC
Applications
simplest way of implementing an external display. A seventy-five to one-hundred Ohm resistor on each LS247 segment-drive output provides adequate display brightness. The functions of pins A - L are listed below: BCD DATA (pins I - L): Four lines are used for BCD (Binary Coded Decimal) data outputs, representing the numbers 0 - 9. Positive-logic convention (a high represents a "1") is used. DIGIT DRIVE ( pins A - E): These five outputs, when gated with STROBE, can be used to direct the BCD DATA into external latches. DIGIT DRIVE outputs may also be connected directly to the bases of NPN transistors in remote-display configurations. The digits are scanned right-to-left, i.e., MSD (DIGIT 1 DRIVE) to LSD (DIGIT 5 DRIVE). BUSY (pin G): This is a status pin that goes high at the start of an analog-to-digital (A / D) conversion cycle and remains high until the conversion ends. STROBE (pin H): A string of five sequential, active-low, STROBE pulses are output (after BUSY goes low) indicating the end of a conversion and the availability of new data. The 5 STROBE pulses occur only once per conversion, or 2.5 times each second. STROBE can be used to latch the BCD data (on pins I - L) into external latches. Either edge can be used since STROBE (~ 5µsec wide) is active only in the center of the corresponding DIGIT DRIVE and BCD DATA outputs. POLARITY (pin F): This pin, which is also used inside the DMS40PC to drive the negative-sign segment, indicates whether the last input signal conversion was positive (POLARITY set high) or negative (POLARITY set low). POLARITY, unlike BCD DATA, is not multiplexed. For data latching purposes, POLARITY should be sampled during the STROBE pulse for digit 1 (most significant digit).
Approx. 8msec Approx. 2msec Approx. 2msec
DIGIT DRIVE 1 (MSD)
DIGIT DRIVE 2 DIGIT DRIVE 3
DIGIT DRIVE 4 DIGIT DRIVE 5 (LSD) BUSY Approx. 5µsec STROBE OUT Data from Previous Conversion BCD DATA (4 LINES) 1 MSD 2 3 4 5 LSD 1 2 3 4 5 5 Strobes Only Per Conversion
Figure 6. BCD Data Timing Diagram
DMS-40PC
Mechanical Specifications
DMS-40PC-X-XX FRONT VIEW 1 2 3 4 5 6 A B C D E F L K J I H G DP1 0.92 (23.4) 0.84 (21.3) DP2 2.17 (55.1) 2.09 (53.1) DP3 DP4 0.040 (1.02) (BCD MODELS ONLY) 1.60 (40.6) 1.80 (45.7) 0.040 (1.02)
PIN #1 IDENTIFIER MADE IN USA INSIDE ROW (BCD MODELS ONLY)
CALIBRATION POTENTIOMETER HOLE LOCATION
PIN 1 (LSD) DIGIT 5 (MSD) DIGIT 1 DIGIT 2 DIGIT 3 DIGIT 4 POLARITY
+5V SUPPLY DISPLAY TEST 5V RETURN DP3 DP2 DP1
0.125 (3.175) DIAMETER (USE ONLY WHEN PC BOARD MOUNTING)
0.040 (1.02) 0.17 (4.3) TYP. 0.50 (12.7)
0.10 (2.5) TYP.
OPTIONAL BEZEL (DMS-BZL1 and DMS-BZL2)
#2-56 INSERT 0.156 (3.96) DEEP 0.187 (4.75)
BEZEL INSTALLATION
FRONT VIEW
RECOMMENDED DRILL AND PANEL CUTOUT DIMENSIONS
INTERNAL CORNER RADII: 0.032 (0.81) MAX. 0.116 (2.95)
RETAINING CLIP INSTALLATION
PANEL CUTOUT
2.35 (59.69) 0.093 (2.362) DIAMETER (4 REQUIRED) ONLY WHEN USING OPTIONAL BEZEL ASSEMBLY 0.096 (2.44)
ISO 9001
DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356 Internet: www.datel.com Email: sales@datel.com Data sheet fax back: (508) 261-2857
DATEL DATEL DATEL DATEL
DATEL makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without notice. The DATEL logo is a registered DATEL, Inc. trademark.
INSIDE ROW (BCD MODELS ONLY)
(-) INPUT LO (+) INPUT HI ANALOG COMMON DISPLAY HOLD DP4 REFERENCE IN / OUT
B4 B2 B1 (LSB) B8 (MSB) STROBE BUSY
0.25 (6.4) TYP.
0.10 (2.5) TYP. 0.15 (3.7) TYP.
LENAP
DS-0272C 1 / 98