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參數(shù)資料
| 型號： | DS1825U+T&R |
| 廠商： | Maxim Integrated |
| 文件頁數(shù)： | 12/21頁 |
| 文件大?。?/td> | 287K |
| 描述： | IC THERMOMETER DIGITAL 8-USOP |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 3,000 |
| 功能： | 溫度計，恒溫計 |
| 傳感器類型： | 內(nèi)部 |
| 感應溫度： | -55°C ~ 125°C |
| 精確度： | ±2°C（最小值） |
| 拓撲： | 寄存器庫，變簽式暫存器 |
| 輸出類型： | 數(shù)字 |
| 輸出警報： | 是 |
| 輸出風扇： | 無 |
| 電源電壓： | 3 V ~ 3.7 V |
| 工作溫度： | -55°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-TSSOP，8-MSOP（0.118"，3.00mm 寬） |
| 供應商設備封裝： | 8-uMAX |
| 包裝： | 帶卷 (TR) |
DS1825 Programmable Resolution 1-Wire Digital Thermometer With 4-Bit ID
12 of 21
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 9
th
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.
COPY SCRATCHPAD [48h]
This command copies the contents of the scratchpad T
H
, T
L
and configuration registers (bytes 2, 3, and 4) to
EEPROM. If the device is being used in parasite power mode, within 10ms (max) after this command is issued the
master must enable a strong pullup on the 1-Wire bus for at least 10ms as described in the POWERING THE
DS1825 section.
RECALL E
2
[B8h]
This command recalls the alarm trigger values (T
H
and T
L
) and configuration data from EEPROM and places the
data in bytes 2, 3, and 4, respectively, in the scratchpad memory. The master device can issue read time slots
following the Recall E
2
command and the DS1825 will indicate the status of the recall by transmitting 0 while the
recall is in progress and 1 when the recall is done. The recall operation happens automatically at power-up, so
valid data is available in the scratchpad as soon as power is applied to the device.
READ POWER SUPPLY [B4h]
The master device issues this command followed by a read time slot to determine if any DS1825s on the bus are
using parasite power. During the read time slot, parasite powered DS1825s will pull the bus low, and externally
powered DS1825s will let the bus remain high. Refer to the POWERING THE DS1825 section for usage
information for this command.
Table 5. DS1825 FUNCTION COMMAND SET
Command
Description
Protocol
1-Wire Bus Activity
After Command is Issued
Notes
TEMPERATURE CONVERSION COMMANDS
Convert T
Initiates temperature
conversion.
44h
DS1825 transmits conversion status
to master (not applicable for
parasite-powered DS1825s).
1
MEMORY COMMANDS
Read Scratchpad
Reads the entire scratchpad
including the CRC byte.
BEh
DS1825 transmits up to 9 data
bytes to master.
2
Write Scratchpad
Writes data into scratchpad
bytes 2, 3, and 4 (T
H
, T
L
, and
configuration registers).
4Eh
Master transmits 3 data bytes to
DS1825.
3
Copy Scratchpad
Copies T
H
, T
L
, and
configuration register data
from the scratchpad to
EEPROM.
48h
None
1
Recall E
2
Recalls T
H
, T
L
, and
configuration register data
from EEPROM to the
scratchpad.
B8h
DS1825 transmits recall status to
master.
Read Power
Supply
Signals DS1825 power supply
mode to the master.
B4h
DS1825 transmits supply status to
master.
NOTES:
1. For parasite-powered DS1825s, the master must enable a strong pullup on the 1-Wire bus during temperature
conversions and copies from the scratchpad to EEPROM. No other bus activity may take place during this
time.
2. The master can interrupt the transmission of data at any time by issuing a reset.
3. All three bytes must be written before a reset is issued.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| DS1830 | 功能描述:監(jiān)控電路 Reset Sequencer RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| DS1830+ | 功能描述:監(jiān)控電路 Reset Sequencer RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| DS1830A | 功能描述:監(jiān)控電路 Reset Sequencer RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| DS1830A+ | 功能描述:監(jiān)控電路 Reset Sequencer RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| DS1830AS | 功能描述:監(jiān)控電路 Reset Sequencer RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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