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參數資料
| 型號： | ADT7476AARQZ-R |
| 廠商： | ON Semiconductor |
| 文件頁數： | 22/66頁 |
| 文件大小： | 945K |
| 描述： | IC REMOTE THERMAL CTLR 24QSOP |
| 產品變化通告： | MFG CHG Notification ADI to ON Semi QSOP 24ld Pkg (MSL) Change 17/Jun/2010 |
| 標準包裝： | 2,500 |
| 系列： | dBCool® |
| 功能： | 風扇控制，溫度監控器 |
| 傳感器類型： | 內部和外部 |
| 感應溫度： | -40°C ~ 125°C |
| 精確度： | ±2.5% |
| 拓撲： | ADC，比較器，風扇速度計數器，多路復用器，寄存器庫 |
| 輸出類型： | SMBus? |
| 輸出警報： | 無 |
| 輸出風扇： | 是 |
| 電源電壓： | 3 V ~ 3.6 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-SSOP（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 24-QSOP |
| 包裝： | 帶卷 (TR) |
| 其它名稱： | ADT7476AARQZ-R-ND ADT7476AARQZ-ROSTR |
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ADT7476A
http://onsemi.com
22
Table 30. INTERRUPT MASK REGISTER 1 (0x74)
Bit
Mnemonic
Description
[7]
OOL
1 masks SMBALERT
for any alert
condition flagged in Interrupt Status
Register 2.
[6]
R2T
1 masks SMBALERT
for Remote 2
temperature.
[5]
LT
1 masks SMBALERT
for Local
temperature.
[4]
R1T
1 masks SMBALERT
for Remote 1
temperature.
[3]
5.0 V
1 masks SMBALERT
for the 5.0 V
channel.
[2]
V
CC
1 masks SMBALERT
for the V
CC
channel.
[1]
V
CCP
1 masks SMBALERT
for the V
CCP
channel.
[0]
2.5 V
1 masks SMBALERT
for the
2.5 V
IN
/THERM
channel.
Table 31. INTERRUPT MASK REGISTER 2 (0x75)
Bit
Mnemonic
Description
[7]
D2
1 masks SMBALERT
for Diode 2 errors.
[6]
D1
1 masks SMBALERT
for Diode 1 errors.
[5]
FAN4
1 masks SMBALERT
for Fan 4 failure.
If the TACH4 pin is being used as the
THERM
input, this bit masks
SMBALERT
for a THERM
event. If the
TACH4 pin is being used as GPIO6,
setting this bit masks interrupts related
to GPIO6.
[4]
FAN3
1 masks SMBALERT
for Fan 3.
[3]
FAN2
1 masks SMBALERT
for Fan 2.
[2]
FAN1
1 masks SMBALERT
for Fan 1.
[1]
OVT
1 masks SMBALERT
for
overtemperature (exceeding THERM
limits).
[0]
12 V/VC
1 masks SMBALERT
for 12 V channel
or for a VID code change, depending on
the function used.
Enabling the SMBALERT
Interrupt Output
The SMBALERT
interrupt function is disabled by
default. Pin 10 or Pin 14 can be reconfigured as an
SMBALERT
output to signal out-of-limit conditions.
Table 32. CONFIGURING PIN 10 AS SMBALERT
OUTPUT
Register
Bit Setting
Configuration Register 3
(0x78)
[1] Pin 10 = SMBALERT
[0] Pin 10 = PWM2
Assigning THERM
Functionality to a Pin
Pin 14 on the ADT7476A has four possible functions:
SMBALERT
, THERM
, GPIO6, and TACH4. The user
chooses the required functionality by setting Bit 0 and Bit 1
of Configuration Register 4 (0x7D).
If THERM
is enabled on Bit 1, Configuration Register 3
(0x78):
?SPAN class="pst ADT7476AARQZ-R_2298076_5"> Pin 22 becomes THERM
.
?SPAN class="pst ADT7476AARQZ-R_2298076_5"> If Pin 14 is configured as THERM
on Bit 0 and Bit 1 of
Configuration Register 4 (0x7D), THERM
is enabled
on this pin.
If THERM
is not enabled:
?SPAN class="pst ADT7476AARQZ-R_2298076_5"> Pin 22 becomes a 2.5 V measurement input.
?SPAN class="pst ADT7476AARQZ-R_2298076_5"> If Pin 14 is configured as THERM
, then THERM
is
disabled on this pin.
Table 33. CONFIGURING PIN 14
Bit 1
Bit 0
Function
0
0
TACH4
0
1
THERM
1
0
SMBALERT
1
1
GPIO6
THERM
as an Input
When THERM
is configured as an input, the user can time
assertions on the THERM
pin. This can be useful for
connecting to the PROCHOT
output of a CPU to gauge
system performance.
When the THERM
pin is driven low externally, the user
can also set up the ADT7476A to run the fans at 100%. The
fans run at 100% for the duration of time that the THERM
pin is pulled low. This is done by setting the BOOST bit
(Bit 2) in Configuration Register 3 (0x78) to 1. This works
only if the fan is already running, for example, in manual
mode, when the current duty cycle is above 0x00, or in
automatic mode when the temperature is above T
MIN
.
If the temperature is below T
MIN
or if the duty cycle in
manual mode is set to 0x00, pulling the THERM
low
externally has no effect. See Figure 31 for more information.
Figure 31. Asserting THERM
Low as an Input in
Automatic Fan Speed Control Mode
THERM
ASSERTED TO LOW AS
AN INPUT: FANS DO NOT GO
TO 100% BECAUSE TEMPERATURE
IS BELOW T
MIN
THERM
ASSERTED TO LOW AS
AN INPUT: FANS GO TO 100%
BECAUSE TEMPERATURE IS
ABOVE T
MIN
AND FANS ARE
ALREADY RUNNING.
T
MIN
THERM
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ADT7476AARQZ-REEL | 功能描述:IC REMOTE THERMAL CTRLR 24-QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:dBCool® 標準包裝:1 系列:- 功能:溫度監控系統（傳感器） 傳感器類型:內部和外部 感應溫度:-40°C ~ 125°C，外部傳感器 精確度:±2.5°C 本地（最大值），±5°C 遠程（最大值） 拓撲:ADC，比較器，寄存器庫 輸出類型:2 線 SMBus? 輸出警報:無 輸出風扇: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 供應商設備封裝:SOT-23-8 包裝:Digi-Reel® 其它名稱:296-22675-6 |
| ADT7476AARQZ-REEL7 | 功能描述:IC REMOTE THERMAL CTRLR 24-QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:dBCool® 標準包裝:1 系列:- 功能:溫度監控系統（傳感器） 傳感器類型:內部和外部 感應溫度:-40°C ~ 125°C，外部傳感器 精確度:±2.5°C 本地（最大值），±5°C 遠程（最大值） 拓撲:ADC，比較器，寄存器庫 輸出類型:2 線 SMBus? 輸出警報:無 輸出風扇: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 供應商設備封裝:SOT-23-8 包裝:Digi-Reel® 其它名稱:296-22675-6 |
| ADT7476AARQZ-RL7 | 功能描述:板上安裝溫度傳感器 MONITORS 5V/4 FANS RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數字輸出 - 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 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
| ADT7476ARQH | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:dBCOOL Remote Thermal Controller and Voltage Monitor |
| ADT7476ARQH-REEL | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:dBCOOL Remote Thermal Controller and Voltage Monitor |
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