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DS1820 Datasheet

  • DS1820

  • 1-WireTM Digital Thermometer

  • 151.87KB

  • Dallas   Dallas

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DS1820
1鈥揥ire
TM
DS1820
Digital Thermometer
FEATURES
PIN ASSIGNMENT
DALLAS
DALLAS
DS2434
DS1820
1
2
3
鈥?/div>
Unique 1鈥揥ire
TM
interface requires only one port pin
for communication
鈥?/div>
Multidrop capability simplifies distributed temperature
sensing applications
鈥?/div>
Requires no external components
鈥?/div>
Can be powered from data line
鈥?/div>
Zero standby power required
鈥?/div>
Measures
temperatures from 鈥?5掳C to +125掳C in
0.5掳C increments. Fahrenheit equivalent is 鈥?7掳F to
+257掳F in 0.9掳F increments
BOTTOM VIEW
1
2 3
鈥?/div>
Temperature is read as a 9鈥揵it digital value.
鈥?/div>
Converts temperature to digital word in 200 ms (typ.)
鈥?/div>
User鈥揹efinable,
tings
nonvolatile temperature alarm set-
DS1820
PR35 PACKAGE
See Mech. Drawings
Section
GND
DQ
VDD
NC
NC
NC
NC
NC
NC
VDD
DQ
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
NC
NC
NC
NC
NC
NC
NC
GND
DS1820S
16鈥揚IN SSOP
See Mech. Drawings
Section
鈥?/div>
Alarm
search command identifies and addresses
devices whose temperature is outside of pro-
grammed limits (temperature alarm condition)
systems, consumer products, thermometers, or any
thermally sensitive system
PIN DESCRIPTION
GND
DQ
V
DD
NC
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Ground
Data In/Out
Optional V
DD
No Connect
鈥?/div>
Applications include thermostatic controls, industrial
DESCRIPTION
The DS1820 Digital Thermometer provides 9鈥揵it tem-
perature readings which indicate the temperature of the
device.
Information is sent to/from the DS1820 over a 1鈥揥ire
interface, so that only one wire (and ground) needs to be
connected from a central microprocessor to a DS1820.
Power for reading, writing, and performing temperature
conversions can be derived from the data line itself with
no need for an external power source.
Because each DS1820 contains a unique silicon serial
number, multiple DS1820s can exist on the same
1鈥揥ire bus. This allows for placing temperature sen-
sors in many different places. Applications where this
feature is useful include HVAC environmental controls,
sensing temperatures inside buildings, equipment or
machinery, and in process monitoring and control.
030598 1/27

DS1820 产品属性

  • 500

  • 传感器，转换器

  • 溫度

  • -

  • -55°C ~ 125°C

  • 开路漏极

  • 3 V ~ 5.5 V

  • ±0.5°C

  • TO-226-3、TO-92-3 标准主体

  • TO-92

  • 散装

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