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參數(shù)資料
| 型號(hào)： | DS18B20/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, RECTANGULAR, THROUGH HOLE MOUNT |
| 封裝： | TO-92, 3 PIN |
| 文件頁數(shù)： | 9/22頁 |
| 文件大?。?/td> | 255K |
| 代理商： | DS18B20/T&R |
DS18B20
17 of 22
data from the DS18B20 is valid for 15
s after the falling edge that initiated the read time slot. Therefore,
the master must release the bus and then sample the bus state within 15
s from the start of the slot.
Figure 15 illustrates that the sum of TINIT, TRC, and TSAMPLE must be less than 15s for a read time slot.
Figure 16 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
s period.
Figure 15. Detailed Master Read 1 Timing
Figure 16. Recommended Master Read 1 Timing
RELATED APPLICATION NOTES
The following application notes can be applied to the DS18B20 and are available on our website at
Application Note 27: Understanding and Using Cyclic Redundancy Checks with Maxim iButton Products
Application Note 122: Using Dallas' 1-Wire ICs in 1-Cell Li-Ion Battery Packs with Low-Side N-Channel
Safety FETs Master
Application Note 126: 1-Wire Communication Through Software
Application Note 162: Interfacing the DS18x20/DS1822 1-Wire Temperature Sensor in a Microcontroller
Environment
Application Note 208: Curve Fitting the Error of a Bandgap-Based Digital Temperature Sensor
Application Note 2420: 1-Wire Communication with a Microchip PICmicro Microcontroller
Application Note 3754: Single-Wire Serial Bus Carries Isolated Power and Data
Sample 1-Wire subroutines that can be used in conjunction with Application Note 74: Reading and
Writing iButtons via Serial Interfaces can be downloaded from the Maxim website.
VPU
GND
1-WIRE BUS
15
s
VIH of Master
TRC
TINT > 1s
Master samples
LINE TYPE LEGEND
Bus master pulling low
Resistor pullup
VPU
GND
1-WIRE BUS
15
s
VIH of Master
TRC =
small
TINT =
small
Master samples
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS18B20U | DIGITAL TEMP SENSOR-SERIAL, 12BIT(s), 0.50Cel, SQUARE, SURFACE MOUNT |
| DS18B20U/T&R | DIGITAL TEMP SENSOR-SERIAL, 12BIT(s), 0.50Cel, SQUARE, SURFACE MOUNT |
| DS18S20-PAR/T&R | DIGITAL TEMP SENSOR-SERIAL, 9BIT(s), 0.50Cel, ROUND, THROUGH HOLE MOUNT |
| DS18S20-PAR | DIGITAL TEMP SENSOR-SERIAL, 9BIT(s), 0.50Cel, ROUND, THROUGH HOLE MOUNT |
| DS18S20Z | DIGITAL TEMP SENSOR-SERIAL, 9BIT(s), 0.50Cel, RECTANGULAR, SURFACE MOUNT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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(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 |
| 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 |
| DS18B20U+ | 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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