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参数资料
| 型号： | DS18B20-SL+T&R |
| 厂商： | Maxim Integrated |
| 文件页数： | 18/22页 |
| 文件大小： | 528K |
| 描述： | IC THERM MICROLAN PROG-RES TO-92 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,000 |
| 功能： | 温度计，恒温计 |
| 传感器类型： | 内部 |
| 感应温度： | -55°C ~ 125°C |
| 精确度： | ±2°C（最小值） |
| 拓扑： | 寄存器库，变签式暂存器 |
| 输出类型： | 1-Wire? |
| 输出警报： | 是 |
| 输出风扇： | 无 |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -55°C ~ 125°C |
| 安装类型： | 通孔 |
| 封装/外壳： | TO-226-3、TO-92-3（TO-226AA）成形引线 |
| 供应商设备封装： | TO-92-3 |
| 包装： | 带卷 (TR) |
DS18B20
18 of 22
DS18B20 OPERATION EXAMPLE 1
In this example there are multiple DS18B20s on the bus and they are using parasite power. The bus
master initiates a temperature conversion in a specific DS18B20 and then reads its scratchpad and
recalculates the CRC to verify the data.
MA TER M DE
DATA L B FIR T
MME T
Tx
Reset
Master issues reset ulse.
Rx
Pr n
D 1 B2 r
n i h r n
l
Tx
55h
Master issues Match ROM command.
Tx
64-bit ROM code
Master sends DS18B20 ROM code.
Tx
44h
Master issues Convert T command.
Tx
DQ line held high by
strong pullup
Master applies strong pullup to DQ for the duration of the
conversion (t
CONV
).
Tx
Reset
Master issues reset ulse.
Rx
Presence
DS18B20s res ond with resence ulse.
Tx
55h
Master issues Match ROM command.
Tx
64-bit ROM code
Master sends DS18B20 ROM code.
Tx
BEh
M r i
R
r h
mm n
Rx
9 data bytes
Master reads entire scratchpad including CRC. The master
then recalculates the CRC of the first eight data bytes from the
scratchpad and compares the calculated CRC with the read
CRC (byte 9). If they match, the master continues; if not, the
read o eration is re eated.
DS18B20 OPERATION EXAMPLE 2
In this example there is only one DS18B20 on the bus and it is using parasite power. The master writes to
the T
H
, T
L
, and configuration registers in the DS18B20 scratchpad and then reads the scratchpad and
recalculates the CRC to verify the data. The master then copies the scratchpad contents to EEPROM.
MASTER MODE DATA LSB FIRST
COMMENTS
Tx
Reset
Master issues reset ulse.
Rx
Presence
DS18B20 res onds with resence ulse.
Tx
h
M r i
ki R M mm n
Tx
4Eh
Master issues Write Scratch ad command.
Tx
3 data b tes
Master sends three data b tes to scratch ad T
H
T
L
and confi .
Tx
Reset
Master issues reset ulse.
Rx
Presence
DS18B20 res onds with resence ulse.
Tx
CCh
Master issues Ski ROM command.
Tx
BEh
Master issues Read Scratch ad command.
Rx
9 data bytes
Master reads entire scratchpad including CRC. The master then
recalculates the CRC of the first eight data bytes from the
scratchpad and compares the calculated CRC with the read CRC
(byte 9). If they match, the master continues; if not, the read
o eration is re eated.
Tx
Reset
Master issues reset ulse.
Rx
Presence
DS18B20 res onds with resence ulse.
Tx
h
M r i
ki R M mm n
Tx
48h
Master issues Co Scratch ad command.
Tx
DQ line held high by
r n
ll
Master applies strong pullup to DQ for at least 10ms while copy
r i n i in r r
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS18B20U | 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| DS18B20U/T&R | 制造商:Maxim Integrated Products 功能描述:1-WIRE DIGITAL THERMOMETER USOP T&R - Tape and Reel |
| DS18B20U/T&R-W | 制造商:Maxim Integrated Products 功能描述:1-WIRE DIGITAL THERMOMETER USOP T&R - Tape and Reel |
| DS18B20U/T&R | 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| DS18B20U+ | 功能描述:板上安装温度传感器 Prgmble Resolution 1-Wire Parasite Pwr RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
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