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参数资料
| 型号： | DS1822Z/T&R |
| 厂商： | Maxim Integrated |
| 文件页数： | 18/21页 |
| 文件大小： | 0K |
| 描述： | IC THERMOMETER ECONO DIG 8-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 感应温度： | -55°C ~ 125°C |
| 输出类型： | 数字 |
| 电源电压： | 3 V ~ 5 V |
| 精确度： | ±2°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
DS1822
DS1822 OPERATION EXAMPLE 1
In this example there are multiple DS1822s on the bus and they are using parasite power. The bus master
initiates a temperature conversion in a specific DS1822 and then reads its scratchpad and recalculates the
CRC to verify the data.
MASTER MODE
TX
RX
TX
TX
TX
TX
TX
RX
TX
TX
TX
RX
DATA (LSB FIRST)
Reset
Presence
55h
64-bit ROM code
44h
DQ line held high by
strong pullup
Reset
Presence
55h
64-bit ROM code
BEh
9 data bytes
COMMENTS
Master issues reset pulse.
DS1822s respond with presence pulse.
Master issues Match ROM command.
Master sends DS1822 ROM code.
Master issues Convert T command.
Master applies strong pullup to DQ for the duration of the
conversion (t conv ).
Master issues reset pulse.
DS1822s respond with presence pulse.
Master issues Match ROM command.
Master sends DS1822 ROM code.
Master issues Read Scratchpad command.
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 operation is repeated.
DS1822 OPERATION EXAMPLE 2
In this example there is only one DS1822 on the bus and it is using parasite power. The master writes to
the T H , T L , and configuration registers in the DS1822 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
TX
RX
TX
TX
TX
TX
RX
TX
TX
RX
TX
RX
TX
TX
TX
DATA (LSB FIRST)
Reset
Presence
CCh
4Eh
3 data bytes
Reset
Presence
CCh
BEh
9 data bytes
Reset
Presence
CCh
48h
DQ line held high by
strong pullup
COMMENTS
Master issues reset pulse.
DS1822 responds with presence pulse.
Master issues Skip ROM command.
Master issues Write Scratchpad command.
Master sends three data bytes to scratchpad (T H , T L , and config).
Master issues reset pulse.
DS1822 responds with presence pulse.
Master issues Skip ROM command.
Master issues Read Scratchpad command.
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
operation is repeated.
Master issues reset pulse.
DS1822 responds with presence pulse.
Master issues Skip ROM command.
Master issues Copy Scratchpad command.
Master applies strong pullup to DQ for at least 10ms while copy
operation is in progress.
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相关代理商/技术参数 |
参数描述 |
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| DS1825 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Programmable Resolution 1-Wire Digital Thermometer With 4-Bit ID |
| DS1825U | 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 |
| DS1825U/T&R | 制造商:Maxim Integrated Products 功能描述:1-W PROGRAMMABLE DGT THERM 8P USOP - Tape and Reel |
| DS1825U/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 |
| DS1825U/TR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Programmable Resolution 1-Wire Digital Thermometer With 4-Bit ID |
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