參數(shù)資料
型號： ADT7461AARMZ-R
廠商： ON Semiconductor
文件頁數(shù)： 15/19頁
文件大?。?/td> 294K
描述： IC TEMP SENSOR DGTL 2CH 8-MSOP
產(chǎn)品變化通告： MFG CHG Notification ADI to ON Semi
標(biāo)準(zhǔn)包裝： 3,000
功能： 溫度監(jiān)控系統(tǒng)（傳感器）
傳感器類型： 內(nèi)部和外部
感應(yīng)溫度： 0°C ~ 127°C，-55°C ~ 150°C
精確度： ±3°C
拓?fù)洌?/td> ADC，比較器，多路復(fù)用器，寄存器庫
輸出類型： 2 線 SMBus?
輸出警報： 是
輸出風(fēng)扇： 是
電源電壓： 3 V ~ 5.5 V
工作溫度： -40°C ~ 120°C
安裝類型： 表面貼裝
封裝/外殼： 8-TSSOP，8-MSOP（0.118"，3.00mm 寬）
供應(yīng)商設(shè)備封裝： Micro8?
包裝： 帶卷 (TR)
ADT7461A
http://onsemi.com
15
The ADT7461A Interrupt System
The ADT7461A has two interrupt outputs, ALERT
 and
THERM
. Both have different functions and behavior.
ALERT
 is maskable and responds to violations of software
programmed temperature limits or an open-circuit fault on
the external diode. THERM
  is intended as a fail-safe
interrupt output that cannot be masked.
If the external or local temperature exceeds the
programmed high temperature limits, or equals or exceeds
the low temperature limits, the ALERT
 output is asserted
low. An open-circuit fault on the external diode also causes
ALERT
 to assert. ALERT
 is reset when serviced by a master
reading its device address, provided the error condition has
gone away and the status register has been reset.
The THERM
 output asserts low if the external or local
temperature exceeds the programmed THERM
  limits.
THERM
 temperature limits should normally be equal to or
greater than the high temperature limits. THERM
 is reset
automatically when the temperature falls back within the
THERM
 limit. The external and local limits are set by
default to 85癈. A hysteresis value can be programmed; in
which case, THERM
 resets when the temperature falls to the
limit value minus the hysteresis value. This applies to both
local and remote measurement channels. The power-on
hysteresis default value is 10癈, but this can be
reprogrammed to any value after powerup.
The hysteresis loop on the THERM
 outputs is useful when
THERM
 is used, for example, as an on/off controller for a
fan. The users system can be set up so that when THERM
asserts, a fan is switched on to cool the system. When
THERM
  goes high again, the fan can be switched off.
Programming a hysteresis value protects from fan jitter,
where the temperature hovers around the THERM
 limit, and
the fan is constantly switched.
Table 15. THERM
 HYSTERESIS
THERM
 Hysteresis
Binary Representation
0癈
0 000 0000
1癈
0 000 0001
10癈
0 000 1010
Figure 19 shows how the THERM
 and ALERT
 outputs
operate. The ALERT
 output can be used as a SMBALERT
to signal to the host via the SMBus that the temperature has
risen. The user can use the THERM
 output to turn on a fan
to cool the system, if the temperature continues to increase.
This method ensures that there is a fail-safe mechanism to
cool the system, without the need for host intervention.
Figure 19. Operation of the ALERT
 and THERM
Interrupts
1005C
THERM
 LIMIT
905C
805C
705C
605C
505C
405C
THERM
 LIMIT  HYSTERESIS
HIGH TEMP LIMIT
RESET BY MASTER
TEMPERATURE
1
2
3
4
ALERT
THERM
" If the measured temperature exceeds the high
temperature limit, the ALERT
 output asserts low.
" If the temperature continues to increase and exceeds the
THERM
 limit, the THERM
 output asserts low. This can
be used to throttle the CPU clock or switch on a fan.
" The THERM
 output deasserts (goes high) when the
temperature falls to THERM
 limit minus hysteresis. In ,
the default hysteresis value of 10癈 is shown.
" The ALERT
 output deasserts only when the
temperature has fallen below the high temperature
limit, and the master has read the device address and
cleared the status register.
" Pin 6 on the ADT7461A can be configured as either an
ALERT
 output or as an additional THERM
 output.
" THERM2
 asserts low when the temperature exceeds the
programmed local and/or remote high temperature
limits. It is reset in the same manner as THERM
 and is
not maskable.
" The programmed hysteresis value also applies to
THERM2
.
Figure 20 shows how THERM
 and THERM2
 operate
together to implement two methods of cooling the system.
In this example, the THERM2
 limits are set lower than the
THERM
 limits. The THERM2
 output is used to turn on a
fan. If the temperature continues to rise and exceeds the
THERM
  limits, the THERM
 output provides additional
cooling by throttling the CPU.
相關(guān)PDF資料
PDF描述
ADT7461ARMZ-2R IC TEMP SENSOR DGTL 2CH 8-MSOP
ADT7463ARQZ-REEL IC REMOTE THERMAL CTRLR 24-QSOP
ADT7476AARQZ-R IC REMOTE THERMAL CTLR 24QSOP
ADT7481ARMZ-1RL IC SENSOR TEMP 2CH ALARM 10MSOP
ADT7482ARMZ-REEL IC SENSOR TEMP 2CH ALARM 10MSOP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADT7461AARMZ-REEL 功能描述:IC SENSOR TEMP DGTL 2CH 8-MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 功能:溫度監(jiān)控系統(tǒng)（傳感器） 傳感器類型:內(nèi)部和外部 感應(yīng)溫度:-40°C ~ 125°C，外部傳感器 精確度:±2.5°C 本地（最大值），±5°C 遠(yuǎn)程（最大值） 拓?fù)?ADC，比較器，寄存器庫 輸出類型:2 線 SMBus? 輸出警報:無 輸出風(fēng)扇:無 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-8 供應(yīng)商設(shè)備封裝:SOT-23-8 包裝:Digi-Reel® 其它名稱:296-22675-6
ADT7461AARMZ-REEL7 功能描述:IC SENSOR TEMP DGTL 2CH 8-MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 功能:溫度監(jiān)控系統(tǒng)（傳感器） 傳感器類型:內(nèi)部和外部 感應(yīng)溫度:-40°C ~ 125°C，外部傳感器 精確度:±2.5°C 本地（最大值），±5°C 遠(yuǎn)程（最大值） 拓?fù)?ADC，比較器，寄存器庫 輸出類型:2 線 SMBus? 輸出警報:無 輸出風(fēng)扇:無 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-8 供應(yīng)商設(shè)備封裝:SOT-23-8 包裝:Digi-Reel® 其它名稱:296-22675-6
ADT7461AARMZ-RL7 功能描述:板上安裝溫度傳感器 1 TMP DIO MON W/SMBUS ITF 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
ADT7461AEBZEVB 功能描述:BOARD EVAL FOR ADT7461 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 過時/停產(chǎn)零件編號 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 傳感器類型:CMOS 成像，彩色（RGB） 傳感范圍:WVGA 接口:I²C 靈敏度:60 fps 電源電壓:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相關(guān)產(chǎn)品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP
ADT7461AR 功能描述:IC TEMP MONITOR +/-1C DUAL 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 功能:溫度監(jiān)控系統(tǒng)（傳感器） 傳感器類型:內(nèi)部和外部 感應(yīng)溫度:-40°C ~ 125°C，外部傳感器 精確度:±2.5°C 本地（最大值），±5°C 遠(yuǎn)程（最大值） 拓?fù)?ADC，比較器，寄存器庫 輸出類型:2 線 SMBus? 輸出警報:無 輸出風(fēng)扇:無 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-8 供應(yīng)商設(shè)備封裝:SOT-23-8 包裝:Digi-Reel® 其它名稱:296-22675-6
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

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

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

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*