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DS1822-PAR Datasheet

  • DS1822-PAR

  • Econo 1-Wire?? Parasite-Power Digital Thermometer

  • 19頁

  • DALLAS   DALLAS

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DS1822-PAR
Econo 1-Wire Parasite-Power
Digital Thermometer
廬
www.dalsemi.com
FEATURES
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Unique 1-wire interface requires only one
port pin for communication
Derives power from data line (鈥減arasite
power鈥?鈥攄oes not need a local power supply
Multi-drop capability simplifies distributed
temperature sensing applications
Requires no external components
鹵2.0擄C
accuracy from 鈥?0擄C to +85擄C
Measures temperatures from 鈥?5擄C to
+100擄C (鈥?7擄F to +212擄F)
Thermometer resolution is user-selectable
from 9 to 12 bits
Converts temperature to 12-bit digital word in
750 ms (max.)
User鈥揹efinable temperature alarm settings
Alarm search command identifies and
addresses devices whose temperature is
outside of programmed limits (temperature
alarm condition)
Software compatible with the DS18B20-PAR
Ideal for use in remote sensing applications
(e.g., temperature probes) that do not have a
local power source
PIN ASSIGNMENT
DALLAS
1822P
1 2 3
(BOTTOM VIEW)
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TO-92
(DS1822-PAR)
PIN DESCRIPTION
GND - Ground
DQ
- Data In/Out
NC
- No Connect
DESCRIPTION
The DS1822-PAR digital thermometer provides 9 to 12鈥揵it centigrade temperature measurements and has
an alarm function with nonvolatile user-programmable upper and lower trigger points. The DS1822-PAR
does not need an external power supply because it derives power directly from the data line (鈥減arasite
power鈥?. The DS1822-PAR communicates over a 1-wire bus, which by definition requires only one data
line (and ground) for communication with a central microprocessor. It has an operating temperature
range of 鈥?5擄C to +100擄C and is accurate to
鹵2.0擄C
over a range of 鈥?0擄C to +85擄C.
Each DS1822-PAR has a unique 64-bit identification code, which allows multiple DS1822-PARs to
function on the same 1鈥搘ire bus; thus, it is simple to use one microprocessor to control many
DS1822-PARs distributed over a large area. Applications that can benefit from this feature include
HVAC environmental controls, temperature monitoring systems inside buildings, equipment or
machinery, and process monitoring and control systems.
1 of 19
GND
DQ
NC
1 2
3
043001

DS1822-PAR 產(chǎn)品屬性

  • Maxim Integrated Products

  • Sensor

  • Local

  • Digital

  • +/- 3 C

  • None

  • 1-Wire

  • 5.5 V

  • 3 V

  • + 100 C

  • - 55 C

  • No

  • Through Hole

  • TO-92-3

  • Econo Digital Thermometer

  • 12 bit

  • 4.95 mm

  • 4.95 mm

  • 3 V to 5.5 V

  • - 55 C to + 100 C

  • DS1822

  • 1 mA

  • 3.94 mm

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