參數(shù)資料
型號： MAX1619MEE
廠商： Maxim Integrated Products, Inc.
元件分類： 溫度/濕度傳感器
英文描述： Remote/Local Temperature Sensor with Dual- Alarm Outputs and SMBus Serial Interface
中文描述： 遠程/本地溫度傳感器，雙報警輸出和SMBus串行接口
文件頁數(shù)： 11/20頁
文件大小： 304K
代理商： MAX1619MEE
tems, since a second master could overwrite the com-
mand byte without informing the first master.
The temperature data format is 7 bits plus sign in two’s
complement form for each channel, with each data bit rep-
resenting 1°C (Table 2), transmitted MSB first. Measure-
ments are offset by +1/2°C to minimize internal rounding
errors; for example, +99.6°C is reported as +100°C.
Alarm T hreshold Registers
Two registers store
ALERT
threshold limits, with high-
temperature (T
HIGH
) and low-temperature (T
LOW
) reg-
isters for the remote A/D channel. There are no
comparison registers for the local A/D channel. If either
measured temperature equals or exceeds the corre-
sponding alarm threshold value, an
ALERT
interrupt is
asserted. The power-on-reset (POR) state of the T
HIGH
register is full scale (0111 1111, or +127°C). The POR
state of the T
LOW
register is 1100 1001 or -55°C.
Two additional alarm threshold registers control the
OVERT
output (see
OVERT
Alarm Outputsection), T
MAX
and T
HYST
. The POR state of T
MAX
is +100°C, and
T
HYST
is +95°C.
OVERT
Alarm Output for Fan Control
The
OVERT
output is an unlatched open-drain output that
behaves as a thermostat to control a fan (Figure 4). When
using the SMBus interface, the polarity of the
OVERT
pin
(active-low at POR) can be inverted via bit 5 in the config-
uration byte.
OVERT
’s current state can be read in the
status byte.
OVERT
can also be used to control a fan without system
intervention.
OVERT
goes low when the remote tempera-
ture rises above T
MAX
and won’t go high again until the
temperature drops below T
HYST
. The power-up default
settings for T
MAX
and T
HYST
(+100°C and +95°C,
respectively) allow the MAX1619 to be used in stand-
alone thermostat applications where connection to an
SMBus serial bus isn’t required.
Diode Fault Alarm
There is a continuity fault detector at DXP that detects
whether the remote diode has an open-circuit condi-
tion. At the beginning of each conversion, the diode
fault is checked, and the status byte is updated. This
fault detector is a simple voltage detector; if DXP rises
above V
CC
- 1V (typical) due to the diode current
source, a fault is detected. Note that the diode fault
isn’t checked until a conversion is initiated, so immedi-
ately after power-on reset the status byte indicates no
fault is present, even if the diode path is broken.
M
Remote/Loc al Temperature S ensor with Dual-
Alarm Outputs and S MBus S erial Interfac e
______________________________________________________________________________________
11
DIGITAL OUTPUT
DATA BITS
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
111
111
111
001
000
000
000
000
000
111
111
110
110
100
100
011
011
1111
1111
1110
1001
0001
0000
0000
0000
0000
1111
1111
0111
0111
1001
1001
1111
1111
+127
+127
+127.00
+126.50
+126
+25
+126.00
+25.25
+1
0
+0.50
+0.25
0
0
0.00
-0.25
ROUNDED
TEMP.
(°C)
TEMP.
(°C)
0
-1
-0.50
-0.75
-1
-25
-1.00
-25.00
-25
-55
-25.50
-54.75
-55
-65
-55.00
-65.00
-65
-70.00
Table 2. Data Format (Two’s Complement)
SIGN
0
MSB
111
LSB
1111
+127
+130.00
MAX1619
SMBCLK
ADD0
ADD1
STBY
V
CC
PGND
+12V
GND
DXP
DXN
+3V TO+5.5V
SMBUS
SERIAL
INTERFACE
(TOHOST)
2N3904
SMBDATA
ALERT
OVERT
Figure 4. Fan Control Application
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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
MAX1619MEE+T 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
MAX1619MEE-T 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
MAX161AC/D 功能描述:數(shù)據(jù)轉(zhuǎn)換系統(tǒng) RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率:0.001 MSPs 分辨率:24 bit 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
MAX161ACPI 功能描述:數(shù)據(jù)轉(zhuǎn)換系統(tǒng) RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率:0.001 MSPs 分辨率:24 bit 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
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