參數(shù)資料
型號(hào)： MAX6680
廠商： Maxim Integrated Products, Inc.
元件分類(lèi)： 溫度/濕度傳感器
英文描述： Fail-Safe Remote/Local Temperature Sensors with SMBus Interface
中文描述： ±1°C、具有失效保護(hù)的遠(yuǎn)端/本地溫度傳感器，帶有SMBus接口
文件頁(yè)數(shù)： 9/17頁(yè)
文件大小： 194K
代理商： MAX6680
ture registers are not updated. The previous data is not
changed and remains available.
SMBus Digital Interface
From a software perspective, the MAX6680/MAX6681
appear as a series of 8-bit registers that contain tem-
perature data, alarm threshold values, and control bits.
A standard SMBus-compatible 2-wire serial interface is
used to read temperature data and write control bits
and alarm threshold data. The device responds to the
same SMBus slave address for access to all functions.
The MAX6680/MAX6681 employ four standard SMBus
protocols: Write Byte, Read Byte, Send Byte, and
Receive Byte (Figure 3). The shorter Receive Byte pro-
tocol allows quicker transfers, provided that the correct
data register was previously selected by a Read Byte
instruction. Use caution with the shorter protocols in
multimaster systems, since a second master could
overwrite the command byte without informing the first
master.
When the conversion rate is 8Hz, temperature data can
be read from the Read Internal Temperature (00h) and
Read External Temperature (01h) registers. The tem-
perature data format in these registers is 7 bits + sign
in two
’
s-complement form for each channel, with the
LSB representing 1
°
C (Table 2). The MSB is transmitted
first. Extended range extends the temperature data
range of the local and remote sensor to -64
°
C. Extended
range is activated by setting bit 3 of the Configuration
register to 1.
When the conversion rate is 4Hz or less, temperature
data can be read from the Read Internal Temperature
(00h) and Read External Temperature (01h) registers,
the same as for faster conversion rates. An additional 3
bits can be read from the Read External Extended
Temperature (10h), which extends the remote tempera-
ture data to 10 bits + sign and the resolution to 0.125
°
C
per LSB (Table 3).
When a conversion is complete, the Main register and
the Extended register are updated almost simultane-
ously. Ensure that no conversions are completed
between reading the Main and Extended registers so
that when data that is read by both registers contain
the result of the same conversion.
M
±1°C Fail-Safe Remote/Local Temperature
Sensors with SMBus Interface
_______________________________________________________________________________________
9
ACK
7 bits
ADDRESS
ACK
WR
8 bits
DATA
ACK
1
P
8 bits
S
COMMAND
Write Byte Format
Read Byte Format
Send Byte Format
Receive Byte Format
Slave Address: equiva-
lent to chip-select line of
a 3-wire interface
Command Byte: selects which
register you are writing to
Data Byte: data goes into the register
set by the command byte (to set
thresholds, configuration masks, and
sampling rate)
ACK
7 bits
ADDRESS
ACK
WR
S
ACK
8 bits
DATA
7 bits
ADDRESS
RD
8 bits
///
P
COMMAND
Slave Address: equiva-
lent to chip-select line
Command Byte: selects
which register you are
reading from
Slave Address: repeated
due to change in data-
flow direction
Data Byte: reads from
the register set by the
command byte
ACK
7 bits
ADDRESS
WR
8 bits
COMMAND
ACK
P
ACK
7 bits
ADDRESS
RD
8 bits
DATA
///
P
S
Command Byte: sends com-
mand with no data, usually
used for one-shot command
Data Byte: reads data from
the register commanded
by the last Read Byte or
Write Byte transmission;
also used for SMBus Alert
Response return address
S = Start condition
P = Stop condition
Shaded = Slave transmission
/// = Not acknowledged
Figure 3. SMBus Protocols
相關(guān)PDF資料
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX6680MEE 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類(lèi)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
MAX6680MEE+ 功能描述:板上安裝溫度傳感器 Fail-Safe Temperature Sensor RoHS:否 制造商:Omron Electronics 輸出類(lèi)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
MAX6680MEE+T 功能描述:板上安裝溫度傳感器 Fail-Safe Temperature Sensor RoHS:否 制造商:Omron Electronics 輸出類(lèi)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
MAX6680MEE-T 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類(lèi)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
MAX6681EVKIT 功能描述:板上安裝溫度傳感器 Evaluation System/Evaluation Kit for the MAX6681 RoHS:否 制造商:Omron Electronics 輸出類(lèi)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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