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參數(shù)資料
| 型號： | DS18B20Z/T&R |
| 廠商： | Maxim Integrated |
| 文件頁數(shù)： | 11/22頁 |
| 文件大?。?/td> | 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(biāo)準(zhǔn)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?fù)洌?/td> | 寄存器庫，變簽式暫存器 |
| 輸出類型： | 1-Wire? |
| 輸出警報： | 是 |
| 輸出風(fēng)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
11 of 22
SKIP ROM [CCh]
The master can use this command to address all devices on the bus simultaneously without sending out
any ROM code information. For example, the master can make all DS18B20s on the bus perform
simultaneous temperature conversions by issuing a Skip ROM command followed by a Convert T [44h]
command.
Note that the Read Scratchpad [BEh] command can follow the Skip ROM command only if there is a
single slave device on the bus. In this case, time is saved by allowing the master to read from the slave
without sending the devices 64-bit ROM code. A Skip ROM command followed by a Read Scratchpad
command will cause a data collision on the bus if there is more than one slave since multiple devices will
attempt to transmit data simultaneously.
ALARM SEARCH [ECh]
The operation of this command is identical to the operation of the Search ROM command except that
only slaves with a set alarm flag will respond. This command allows the master device to determine if
any DS18B20s experienced an alarm condition during the most recent temperature conversion. After
every Alarm Search cycle (i.e., Alarm Search command followed by data exchange), the bus master must
return to Step 1 (Initialization) in the transaction sequence. See the OperationAlarm Signaling section
for an explanation of alarm flag operation.
DS18B20 FUNCTION COMMANDS
After the bus master has used a ROM command to address the DS18B20 with which it wishes to
communicate, the master can issue one of the DS18B20 function commands. These commands allow the
master to write to and read from the DS18B20s scratchpad memory, initiate temperature conversions and
determine the power supply mode. The DS18B20 function commands, which are described below, are
summarized in Table 3 and illustrated by the flowchart in Figure 12.
CONVERT T [44h]
This command initiates a single temperature conversion. Following the conversion, the resulting thermal
data is stored in the 2-byte temperature register in the scratchpad memory and the DS18B20 returns to its
low-power idle state. If the device is being used in parasite power mode, within 10祍 (max) after this
command is issued the master must enable a strong pullup on the 1-Wire bus for the duration of the
conversion (t
CONV
) as described in the Powering the DS18B20 section. If the DS18B20 is powered by an
external supply, the master can issue read time slots after the Convert T command and the DS18B20 will
respond by transmitting a 0 while the temperature conversion is in progress and a 1 when the conversion
is done. In parasite power mode this notification technique cannot be used since the bus is pulled high by
the strong pullup during the conversion.
WRITE SCRATCHPAD [4Eh]
This command allows the master to write 3 bytes of data to the DS18B20s scratchpad. The first data byte
is written into the T
H
register (byte 2 of the scratchpad), the second byte is written into the T
L
register
(byte 3), and the third byte is written into the configuration register (byte 4). Data must be transmitted
least significant bit first. All three bytes MUST be written before the master issues a reset, or the data
may be corrupted.
READ SCRATCHPAD [BEh]
This command allows the master to read the contents of the scratchpad. The data transfer starts with the
least significant bit of byte 0 and continues through the scratchpad until the 9th byte (byte 8 CRC) is
read. The master may issue a reset to terminate reading at any time if only part of the scratchpad data is
needed.
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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(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 |
| 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(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 |
| 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(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 |
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