參數(shù)資料
型號(hào)： MAX1618MUB
廠(chǎng)商： MAXIM INTEGRATED PRODUCTS INC
元件分類(lèi)： 溫度/濕度傳感器
英文描述： Remote Temperature Sensor with SMBus Serial Interface
中文描述： DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 5Cel, SQUARE, SURFACE MOUNT
封裝： MICRO MAX PACKAGE-10
文件頁(yè)數(shù)： 10/20頁(yè)
文件大?。?/td> 430K
代理商： MAX1618MUB
above V
CC
- 1V (typ) or below V
DXN
+ 50mv (typ), a
fault is detected and
ALERT
is asserted. ADC reads
+127°C. Also, if the ADC has an extremely low differen-
tial input voltage, the diode is assumed to be shorted
and a fault is detected. Note that the diode fault is not
checked until a conversion is initiated, so immediately
after power-on reset, the status byte indicates no fault
is present even if the diode path is broken.
ALERT
Interrupts
Normally, the
ALERT
interrupt output signal is latched
and can be cleared only by reading the Alert Response
address. Interrupts are generated in response to T
HIGH
and T
LOW
comparisons and when the remote diode is
faulted. The interrupt does not halt automatic conver-
sions; new temperature data continues to be available
over the SMBus interface after
ALERT
is asserted. The
interrupt output pin is open-drain so the devices can
share a common interrupt line.
The interface responds to the SMBus Alert Response
address, an interrupt pointer return-address feature
(see
Alert Response Address
section). Before taking
corrective action, always check to ensure that an inter-
rupt is valid by reading the current temperature.
The alert activates only once per crossing of a given
temperature threshold to prevent any re-entrant inter-
rupts. To enable a new interrupt, rewrite the value of the
violated temperature threshold.
Alert Response Address
The SMBus Alert Response interrupt pointer provides
quick fault identification for simple slave devices that
lack the complex, expensive logic needed to be a bus
master. Upon receiving an
ALERT
interrupt signal, the
host master can broadcast a Receive Byte transmission
to the Alert Response slave address (0001100). Any
slave device that generated an interrupt then attempts
to identify itself by putting its own address on the bus
(Table 2).
The Alert Response can activate several different slave
devices simultaneously, similar to the I
2
C General Call.
If more than one slave attempts to respond, bus arbitra-
tion rules apply, and the device with the lower address
code wins. The losing device does not generate an
acknowledgement and continues to hold the
ALERT
line low until serviced (implies that the host interrupt
input is level sensitive). Successful reading of the alert
response address clears the interrupt latch.
Command Byte Functions
The 8-bit command byte register (Table 3) is the master
index that points to the other registers within the
MAX1618. The register’s POR state is 0000 0001, so a
I
2
C is a trademark of Philips Corp.
Receive Byte transmission (a protocol that lacks the
command byte) that occurs immediately after POR
returns the current remote temperature data.
The one-shot command immediately forces a new con-
version cycle to begin. A new conversion begins in
software standby mode (RUN/STOP bit = high). The
device returns to standby mode after the conversion. If
a conversion is in progress when a one-shot command
is received, the command is ignored. If a one-shot
command is received in autoconvert mode (RUN/STOP
bit = low) between conversions, a new conversion
begins; the conversion rate timer is reset, and the next
automatic conversion takes place after a full delay
elapses.
Configuration Byte Functions
The configuration byte register (Table 4) is used to
mask (disable) interrupts, to put the device in software
standby or thermostat mode, change the polarity of the
alert output (thermostat mode only), and to change the
diode bias current. The lower three bits are internally
driven low (000), making them “don’t care” bits. Write
zeros to these bits. The serial interface can read back
this register’s contents.
Status Byte Functions
The status byte register (Table 5) indicates which (if
any) temperature thresholds have been exceeded. This
byte also indicates whether the ADC is converting and
whether there is a fault in the remote diode DXP-DXN
path. After POR, the normal state of all the flag bits is
zero, assuming none of the alarm conditions is present.
The status byte is cleared by any successful read of
the status byte. Note that the
ALERT
interrupt latch is
not automatically cleared when the status flag bit is
cleared.
M
Remote Temperature Sensor
with SMBus Serial Interface
10
______________________________________________________________________________________
ADD6
ADD5
ADD4
ADD3
ADD2
ADD1
6
5
4
3
2
1
0
Provide the current MAX1618
slave address that was latched at
POR (Table 6)
FUNCTION
ADD7
7
(MSB)
ADD0
(LSB)
Logic 1
BIT
NAME
Table 2. Read Format for Alert Response
Address (0001 100)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1618MUB+ 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(xiàn)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
MAX1618MUB+T 功能描述:板上安裝溫度傳感器 Sensors, Transducers 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(xiàn)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
MAX1618MUB-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(xiàn)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
MAX1619MEE 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(xiàn)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
MAX1619MEE+ 功能描述:板上安裝溫度傳感器 Remote/Local Temp Sensor w Dual Alarm 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(xiàn)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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