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參數(shù)資料
| 型號： | DS18B20-PAR/T&R |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | Switch/Digital Output Temperature Sensor |
| 英文描述： | DIGITAL TEMP SENSOR-SERIAL, 12BIT(s), 0.50Cel, ROUND, THROUGH HOLE MOUNT |
| 封裝： | TO-92, 3 PIN |
| 文件頁數(shù)： | 7/19頁 |
| 文件大?。?/td> | 203K |
| 代理商： | DS18B20-PAR/T&R |
DS18B20-PAR
15 of 19
the read time slot. Therefore, the master must release the bus and then sample the bus state within 15
μs
from the start of the slot.
Figure 14 illustrates that the sum of TINIT, TRC, and TSAMPLE must be less than 15 μs for a read time slot.
Figure 15 shows that system timing margin is maximized by keeping TINIT and TRC as short as possible
and by locating the master sample time during read time slots towards the end of the 15
μs period.
DETAILED MASTER READ 1 TIMING Figure 14
RECOMMENDED MASTER READ 1 TIMING Figure 15
DS18B20-PAR OPERATION EXAMPLE 1
In this example there are multiple DS18B20-PARs on the bus. The bus master initiates a temperature
conversion in a specific DS18B20-PAR and then reads its scratchpad and recalculates the CRC to verify
the data.
MASTER MODE
DATA (LSB FIRST)
COMMENTS
TX
Reset
Master issues reset pulse.
RX
Presence
DS18B20-PARs respond with presence pulse.
TX
55h
Master issues Match ROM command.
TX
64-bit ROM code
Master sends DS18B20-PAR 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 (tconv).
TX
Reset
Master issues reset pulse.
RX
Presence
DS18B20-PARs respond with presence pulse.
TX
55h
Master issues Match ROM command.
TX
64-bit ROM code
Master sends DS18B20-PAR ROM code.
TX
BEh
Master issues Read Scratchpad command.
VPU
GND
1-WIRE BUS
15
μs
VIH of Master
TRC
TINT > 1 μs
Master samples
LINE TYPE LEGEND
Bus master pulling low
Resistor pullup
VPU
GND
1-WIRE BUS
15
μs
VIH of Master
TRC =
small
TINT =
small
Master samples
相關PDF資料 |
PDF描述 |
|---|---|
| DS18B20-PAR | DIGITAL TEMP SENSOR-SERIAL, 12BIT(s), 0.50Cel, ROUND, THROUGH HOLE MOUNT |
| DS18B20P | DIGITAL TEMP SENSOR-SERIAL, 12BIT(s), 0.50Cel, RECTANGULAR, SURFACE MOUNT |
| DS18B20X | DIGITAL TEMP SENSOR-SERIAL, 12BIT(s), 2Cel, RECTANGULAR, SURFACE MOUNT |
| DS18B20Z | DIGITAL TEMP SENSOR-SERIAL, 12BIT(s), 0.50Cel, RECTANGULAR, SURFACE MOUNT |
| DS18B20 | DIGITAL TEMP SENSOR-SERIAL, 12BIT(s), 0.50Cel, RECTANGULAR, THROUGH HOLE MOUNT |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| DS18B20-SL | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Programmable Resolution 1-Wire Digital Thermometer |
| DS18B20-SL/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 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
| DS18B20-SL+T&R | 制造商:Maxim Integrated Products 功能描述:TEMP SENSOR DGTL SERL (1-WIRE) - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC THERM MICROLAN PROG-RES TO-92 制造商:Maxim Integrated Products 功能描述:Board Mount Temperature Sensors Prgmble Resolution 1-Wire Parasite Pwr |
| DS18B20-SL+T&R | 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 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
| DS18B20U | 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 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
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