Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

DS18S20 Datasheet(PDF) 5 Page - Dallas Semiconductor

Part # DS18S20
Description  High Precision 1-Wire Digital Thermometer
Download  27 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  DALLAS [Dallas Semiconductor]
Direct Link  https://www.maximintegrated.com/en.html
Logo DALLAS - Dallas Semiconductor

DS18S20 Datasheet(HTML) 5 Page - Dallas Semiconductor

  DS18S20 Datasheet HTML 1Page - Dallas Semiconductor DS18S20 Datasheet HTML 2Page - Dallas Semiconductor DS18S20 Datasheet HTML 3Page - Dallas Semiconductor DS18S20 Datasheet HTML 4Page - Dallas Semiconductor DS18S20 Datasheet HTML 5Page - Dallas Semiconductor DS18S20 Datasheet HTML 6Page - Dallas Semiconductor DS18S20 Datasheet HTML 7Page - Dallas Semiconductor DS18S20 Datasheet HTML 8Page - Dallas Semiconductor DS18S20 Datasheet HTML 9Page - Dallas Semiconductor Next Button
Zoom Inzoom in Zoom Outzoom out
 5 / 27 page
background image
DS18S20
5 of 27
OPERATION – MEASURING TEMPERATURE
The core functionality of the DS18S20 is its direct-to-digital temperature sensor. The direct readout of
temperature data is 9 bits wide, equating to a resolution of 0.5
°C; if higher resolution is desired, an
algorithm is described later in this section to achieve that need. Following the issuance of the Convert T
[44h] command, a temperature conversion is performed and the thermal data is stored in the scratchpad
memory in a 16-bit, sign-extended two’s complement format.
The temperature information can be
retrieved over the 1-Wire interface by issuing a Read Scratchpad [BEh] command once the conversion
has been performed. The data is transferred over the 1-Wire bus, LSB first. The MSB of the temperature
register contains the “sign” (S) bit, denoting whether the temperature is positive or negative.
Table 2 describes the exact relationship of output data to measured. For Fahrenheit usage, a lookup table
or conversion routine must be used.
Temperature/Data Relationships Table 2
2
6
2
5
2
4
2
3
2
2
2
1
2
0
2
-1
LSB
MSb
(unit =
°C)
LSb
S
S
S
SSS
S
S
MSB
TEMPERATURE
DIGITAL OUTPUT
(Binary)
DIGITAL
OUTPUT
(Hex)
+85°C
0000 0101 0101 0000
0550h*
+125°C
0000 0000 1111 1010
00FAh
+25.0°C
0000 0000 0011 0010
0032h
+0.5°C
0000 0000 0000 0001
0001h
0°C
0000 0000 0000 0000
0000h
-0.5°C
1111 1111 1111 1111
FFFFh
-25.0°C
1111 1111 1100 1110
FFCEh
-55°C
1111 1111 1001 0010
FF92h
*The power on reset register value is +85°C
Higher resolutions may be obtained by the following procedure.
First, read the temperature,
COUNT_REMAIN, and COUNT_PER_C registers from the scratchpad.
Truncate the 0.5
°C bit (the
LSB) from the temperature value. This value is TEMP_READ. The actual temperature may then be
calculated by using the following:
C
PER
COUNT
REMAIN
COUNT
C
PER
COUNT
READ
TEMP
E
TEMPERATUR
_
_
_
_
_
25
.
0
_
+
=
OPERATION – ALARM SIGNALING
After the DS18S20 has performed a temperature conversion, the temperature value is compared to the
trigger values stored in TH and TL. Since these registers are 8–bit only, the 0.5
°C bit is ignored for
comparison. The most significant bit of TH or TL directly corresponds to the sign bit of the 16–bit
temperature register. If the result of a temperature measurement is higher than TH or lower than TL, an
alarm flag inside the device is set. This flag is updated with every temperature measurement. As long as


Similar Part No. - DS18S20

ManufacturerPart #DatasheetDescription
logo
Maxim Integrated Produc...
DS18S20 MAXIM-DS18S20 Datasheet
317Kb / 23P
   High-Precision 1-Wire Digital Thermometer
Rev 8/10
DS18S20++ MAXIM-DS18S20+ Datasheet
486Kb / 21P
   High-Precision 1-Wire Digital Thermometer
2015
DS18S20+T&R MAXIM-DS18S20+T&R Datasheet
486Kb / 21P
   High-Precision 1-Wire Digital Thermometer
2015
logo
Dallas Semiconductor
DS18S20-PAR DALLAS-DS18S20-PAR Datasheet
141Kb / 20P
   1-Wire짰 Parasite-Power Digital Thermometer
logo
Maxim Integrated Produc...
DS18S20-PAR MAXIM-DS18S20-PAR Datasheet
256Kb / 20P
   1-Wire Parasite-Power Digital Thermometer
111803
More results

Similar Description - DS18S20

ManufacturerPart #DatasheetDescription
logo
Maxim Integrated Produc...
DS18S20 MAXIM-DS18S20_V01 Datasheet
486Kb / 21P
   High-Precision 1-Wire Digital Thermometer
2015
DS18S20 MAXIM-DS18S20 Datasheet
317Kb / 23P
   High-Precision 1-Wire Digital Thermometer
Rev 8/10
DS18B20 MAXIM-DS18B20_08 Datasheet
261Kb / 22P
   1-Wire Digital Thermometer
REV: 042208
logo
Dallas Semiconductor
DS1820 DALLAS-DS1820 Datasheet
151Kb / 27P
   1-Wire Digital Thermometer
logo
TelCom Semiconductor, I...
TC625 TELCOM-TC625 Datasheet
68Kb / 2P
   1-WIRE DIGITAL THERMOMETER
logo
Dallas Semiconductor
DS18B20X DALLAS-DS18B20X Datasheet
184Kb / 21P
   Flipchip 1-Wire Digital Thermometer
DS1626 DALLAS-DS1626_07 Datasheet
135Kb / 14P
   High-Precision 3-Wire Digital Thermometer and Thermostat
DS1822 DALLAS-DS1822 Datasheet
268Kb / 20P
   Econo 1-Wire Digital Thermometer
logo
Maxim Integrated Produc...
DS1822 MAXIM-DS1822_V01 Datasheet
252Kb / 21P
   Econo 1-Wire Digital Thermometer
2015
DS1822 MAXIM-DS1822 Datasheet
222Kb / 21P
   Econo 1-Wire Digital Thermometer
101107
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com