參數(shù)資料
型號(hào)： DS1822-PAR
元件分類： 溫度傳感器
英文描述： Econo 1-Wire?? Parasite-Power Digital Thermometer
文件頁(yè)數(shù)： 4/19頁(yè)
文件大?。?/td> 138K
代理商： DS1822-PAR
DS1822-PAR
4 of 19
TEMPERATURE REGISTER FORMAT
Figure 3
bit 7
bit 6
LS Byte
2
3
2
2
bit 5
2
1
bit 4
2
0
bit 3
2
-1
bit 2
2
-2
bit 1
2
-3
bit 0
2
-4
bit 15
S
bit 14
S
bit 13
S
bit 12
S
bit 11
S
bit 10
2
6
bit 9
2
5
bit 8
2
4
MS Byte
TEMPERATURE/DATA RELATIONSHIP
Table 2
TEMPERATURE
DIGITAL OUTPUT
(Binary)
0000 0101 0101 0000
0000 0001 1001 0001
0000 0000 1010 0010
0000 0000 0000 1000
0000 0000 0000 0000
1111 1111 1111 1000
1111 1111 0101 1110
1111 1110 0110 1111
1111 1100 1001 0000
DIGITAL OUTPUT
(Hex)
0550h
0191h
00A2h
0008h
0000h
FFF8h
FF5Eh
FE6Fh
FC90h
+85°C*
+25.0625°C
+10.125°C
+0.5°C
0°C
-0.5°C
-10.125°C
-25.0625°C
-55°C
*The power-on reset value of the temperature register is +85°C
OPERATION – ALARM SIGNALING
After the DS1822-PAR performs a temperature conversion, the temperature value is compared to the
user-defined two’s complement alarm trigger values stored in the 1-byte T
H
and T
L
registers (see Figure
4). The sign bit (S)
indicates if the value is positive or negative: for positive numbers S = 0 and for
negative numbers S = 1. The T
H
and T
L
registers are nonvolatile (EEPROM) so they will retain data
when the device is powered down. T
H
and T
L
can be accessed through bytes 2 and 3 of the scratchpad as
explained in the MEMORY section of this datasheet.
T
H
AND T
L
REGISTER FORMAT
Figure 4
bit 7
S
bit 6
2
6
bit 5
2
5
bit 4
2
5
bit 3
2
5
bit 2
2
2
bit 1
2
1
bit 0
2
0
Only bits 11 through 4 of the temperature register are used in the T
H
and T
L
comparison since T
H
and T
L
are 8-bit registers. If the result of a temperature measurement is higher than T
H
or lower than T
L
, an
alarm condition exists and an alarm flag is set inside the DS1822-PAR. This flag is updated after every
temperature measurement; therefore, if the alarm condition goes away, the flag will be turned off after the
next temperature conversion.
The master device can check the alarm flag status of all DS1822-PARs on the bus by issuing an Alarm
Search [ECh] command. Any DS1822-PARs with a set alarm flag will respond to the command, so the
master can determine exactly which DS1822-PARs have experienced an alarm condition. If an alarm
condition exists and the T
H
or T
L
settings have changed, another temperature conversion should be done
to validate the alarm condition.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS1822-PAR/T&R 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor
DS1822-PAR_07 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Econo 1-Wire Parasite-Power Digital Thermometer
DS1822-PAR+T&R 制造商:Maxim Integrated Products 功能描述: 制造商:Maxim Integrated Products 功能描述:TEMP SENSOR DGTL 1-WIRE 3PIN TO-92 - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC THERMOMETER ECONO DIG TO-92 制造商:Maxim Integrated Products 功能描述:Board Mount Temperature Sensors 1-Wire Digital Thermometer
DS1822-PAR+T&R 功能描述:板上安裝溫度傳感器 1-Wire Digital Thermometer RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor
DS-18-22-RS 制造商:TE Connectivity 功能描述:Red sealed splice terminal,0.5-1.5sq.mm
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