參數(shù)資料
型號(hào)： MAX6681
廠商： Maxim Integrated Products, Inc.
英文描述： Quadruple 2-Line To 1-Line Data Selector/Multiplexer With 3-State Outputs 16-CFP -55 to 125
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)： 10/17頁(yè)
文件大?。?/td> 194K
代理商： MAX6681
M
To ensure valid extended data, read extended resolu-
tion temperature data using one of the following
approaches:
1) Put the MAX6680/MAX6681 into standby mode by
setting bit 6 of the Configuration register to 1. Initiate
a one-shot conversion using Send Byte command
0Fh. When this conversion is complete, read the
contents of the temperature data registers.
2) If the MAX6680/MAX6681 are in run mode, read the
Status register. If a conversion is in progress, the
BUSY bit is set to 1. Wait for the conversion to com-
plete as indicated by the BUSY bit being set to zero,
then read the temperature data registers.
Diode Fault Alarm
There is a continuity fault detector at DXP that detects
an open circuit between DXP and DXN, or a DXP short
to V
CC
, GND, or DXN. If an open or short circuit exists,
the External Temperature register is loaded with 1000
0000. Additionally, if the fault is an open circuit, bit 2
(OPEN) of the Status byte is set to 1 and the ALERT
condition is activated at the end of the conversion.
Immediately after power-on reset, the Status register
indicates that no fault is present until the end of the first
conversion.
Alarm Threshold Registers
Four registers store
ALERT
threshold values
—
one high-
temperature (T
HIGH
) and one low-temperature (T
LOW
)
register each for the local and remote channels. If
either measured temperature equals or exceeds the
corresponding
ALERT
threshold value, the
ALERT
out-
put is asserted.
The POR state of both
ALERT
T
HIGH
registers is 0111
1111 or +127
°
C and the POR state of T
LOW
registers is
1100 1001 or -55
°
C.
Two additional registers, RWOE and RWOI, store
remote and local alarm threshold data information cor-
responding to the
OVERT
output (see the
OVERT
Overtemperature Alarm
section).
ALERT
The
ALERT
output operates in two modes
—
the typical
interrupt mode and comparator mode. The INT_SEL
input determines the mode. When INT_SEL is connect-
ed to V
CC
high, using a weak pullup resistor, or left
floating, the
ALERT
functions in the interrupt mode.
ALERT
Interrupt Mode
An
ALERT
interrupt occurs when the internal or external
temperature reading exceeds a high or low tempera-
ture limit (user programmed) or when the remote diode
is disconnected (for continuity fault detection). The
ALERT
interrupt output signal is latched and can be
cleared only by either reading the Status register or by
successfully responding to an Alert Response address.
In both cases, the alert is cleared even if the fault con-
dition still exists, but is reasserted at the end of the next
conversion. The interrupt does not halt automatic con-
versions. The interrupt output pin is open drain so that
multiple devices can share a common interrupt line.
The interrupt rate never exceeds the conversion rate.
Comparator Mode
Connecting INT_SEL to ground operates the
ALERT
output in comparator mode. In the comparator mode,
whenever the temperature of the remote or local temp
sensor goes outside the limits set by T
HIGH
or T
LOW
,
the
ALERT
output becomes inactive after the tempera-
±1°C Fail-Safe Remote/Local Temperature
Sensors with SMBus Interface
10
______________________________________________________________________________________
TEMP (
°
C)
LEGACY MODE
DIGITAL OUTPUT
EXTENDED
RANGE
DIGITAL OUTPUT
127.00
25
1
0.00
-1
-25
-64
0111 1111
0001 1001
0000 0001
0000 0000
0000 0000
0000 0000
0000 0000
0111 1111
0001 1001
0000 0001
0000 0000
1111 1111
1110 0111
1000 0000
Diode Fault
(Short or
Open)
1000 0000
1000 0000
Table 2. Data Format (Two
’
s Complement)
FRACTIONAL
TEMPERATURE
CONTENTS OF
EXTENDED REGISTER
0.000
0.125
0.250
0.375
0.500
0.625
0.750
0.875
000X XXXX
001X XXXX
010X XXXX
011X XXXX
100X XXXX
101X XXXX
110X XXXX
111X XXXX
Table 3. Extended Resolution Register
Note:
Extended mode applies only for conversion rates of 4Hz
and slower.
相關(guān)PDF資料
PDF描述
MAX6681MEE QUADRUPLE 2-INPUT POSITIVE-OR GATES 20-LCCC -55 to 125
MAX6680 Fail-Safe Remote/Local Temperature Sensors with SMBus Interface
MAX6684 QUADRUPLE 2-INPUT POSITIVE-OR GATES 14-CDIP -55 to 125
MAX6684ESA QUADRUPLE 2-INPUT POSITIVE-OR GATES 14-CFP -55 to 125
MAX6690 2∑C Accurate Remote/Local Temperature Sensor with SMBus Serial Interface
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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
MAX6681EVSYS 功能描述:板上安裝溫度傳感器 1 C Fail-Safe Remote/Local Temperature Sensors with SMBus Interface 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
MAX6681MEE 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
MAX6681MEE+ 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
MAX6681MEE+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
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*