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TMP7 Datenblatt(PDF) 6 Page - ABCircuits

Teilenummer TMP7
Bauteilbeschribung  Thermometer with Seven Segment and Serial Output
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Hersteller  ABCIRCUITS [ABCircuits]
Direct Link  http://www.abcircuits.com
Logo ABCIRCUITS - ABCircuits

TMP7 Datenblatt(HTML) 6 Page - ABCircuits

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Turning Ideas Into Reality
ABCircuits www.abcircuits.com POB 123 New Hill NC 27562 (919) 290-7104
Part Number TMP7
Copyright © 2014 ABCircuits. Revised September 2014 Page 6 of 10
SCALE
FARH
Output
Open or high
Open or high
Degrees Fahrenheit
Open or high
Ground or low
Degrees Celsius
Ground or low
Open or high
Percentage (0-100)
Ground or low
Ground or low
Raw analog count
In the Celsius scale, the output ranges from –40 to 150.
In the Fahrenheit scale, the output ranges from -40 to 199.
In the percentage mode, the output ranges from 0-100. (101 counts) A small resistor on the
VCC side of the input potentiometer or a voltage divider may be used to drop the scale to 0-99 so
only 2 displays are necessary.
In the raw analog mode, the seven segment display shows 00-FF (8 bits hexadecimal) One
count = VCC/256 volts.
The serial output in raw mode ranges from 000-FFF (12 bits hexadecimal.) One count =
VCC/4096 volts.
SOUT-
SOUT- is the serial output of the IC to optionally connect to your UART, a RS-232 driver, a USB
IC or Ethernet. The IC outputs three ASCII formatted numbers, followed by a carriage return. (0D
hex) The output format is 9600 BPS, 8 bits 1 stop, no parity. Data is sent about every 250 mS.
SEGRA, SEGRB, SEGRC, SEGRD, SEGRE, SEGRF, SEGRG
SEGLA, SEGLB, SEGLC, SEGLD, SEGLE, SEGLF, SEGLG
SEG3B, SEG3C, SEG3G
SEG3 is the optional 100’s and minus display
SEGR is the right hand of the two displays.
SEGL is the left hand of the two displays
If the POL pin is open or hi, this SEG outputs will be high when a segment is on.
If the POL pin is low or grounded, the SEG outputs will be low when a segment is on.
These are the seven segment outputs to each individual display An external driver or current
limiting resistor is required for each segment. If you are using only a resistor, it must be sized to
limit source current to 5 mA maximum per pin or sink current to 9 mA per pin.
See also the segment table, and the ASCII to seven segment translation table.
VSS
Connect to system ground.
VDD
Connect to supply voltage of 3.3 to 5 volts. A .1 uF decoupling capacitor to ground is
recommended.
NOTES:
Make no connection to the NC pins. Pins 9 and 19 must be left unconnected.


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