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參數(shù)資料
| 型號： | DS18B20Z/T&R |
| 廠商： | Maxim Integrated |
| 文件頁數(shù)： | 4/22頁 |
| 文件大小： | 528K |
| 描述： | IC THERM MICROLAN PROG-RES 8SOIC |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,500 |
| 功能： | 溫度計，恒溫計 |
| 傳感器類型： | 內(nèi)部 |
| 感應(yīng)溫度： | -55°C ~ 125°C |
| 精確度： | ±2°C（最小值） |
| 拓撲： | 寄存器庫，變簽式暫存器 |
| 輸出類型： | 1-Wire? |
| 輸出警報： | 是 |
| 輸出風扇： | 無 |
| 電源電壓： | 3 V ~ 5.5 V |
| 工作溫度： | -55°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SOIC |
| 包裝： | 帶卷 (TR) |
DS18B20
4 of 22
Figure 2. Temperature Register Format
BIT 7
BIT
BIT
BIT 4
BIT
BIT 2
BIT 1
BIT
LS BYTE
2
3
2
2
2
1
2
0
2
-1
2
-2
2
-3
2
-4
BIT 1
BIT 14
BIT 1
BIT 12
BIT 11
BIT 1
BIT
BIT
MS BYTE
S
S
S
S
S
2
6
2
5
2
4
S = SIGN
Table 1. Temperature/Data Relationship
TEMPERATURE (?/SPAN>C)
DIGITAL OUTPUT
(BINARY)
DIGITAL OUTPUT
(HEX)
+125
0000 0111 1101 0000
07D0h
+85*
0000 0101 0101 0000
0550h
+25.0625
0000 0001 1001 0001
0191h
+10.125
0000 0000 1010 0010
00A2h
+0.5
0000 0000 0000 1000
0008h
0
0000 0000 0000 0000
0000h
-0.5
1111 1111 1111 1000
FFF8h
-10.125
1111 1111 0101 1110
FF5Eh
-25.0625
1111 1110 0110 1111
FE6Fh
-55
1111 1100 1001 0000
FC90h
*The power-on reset value of the temperature register is +85?/SPAN>C.
OPERATIONALARM SIGNALING
After the DS18B20 performs a temperature conversion, the temperature value is compared to the user-
defined twos complement alarm trigger values stored in the 1-byte T
H
and T
L
registers (see Figure 3).
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.
Figure 3. T
H
and T
L
Register Format
BIT 7
BIT
BIT
BIT 4
BIT
BIT 2
BIT 1
BIT
S
2
6
2
5
2
4
2
3
2
2
2
1
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 measured temperature is lower than or equal to T
L
or higher than or equal to T
H
,
an alarm condition exists and an alarm flag is set inside the DS18B20. 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.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS18B20Z-W | 制造商:Maxim Integrated Products 功能描述: |
| DS18S20 | 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: 安裝風格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| DS18S20/T&R | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:IC THERM MICROLAN HI PREC TO-92 |
| DS18S20/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: 安裝風格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| DS18S20+ | 功能描述:板上安裝溫度傳感器 Prgmble Resolution 1-Wire Parasite Pwr RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 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: 安裝風格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
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