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| 型號(hào)： | ADT7482ARMZ-RL |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類(lèi)： | 溫度/濕度傳感器 |
| 英文描述： | DIGITAL TEMP SENSOR-SERIAL, 11BIT(s), 2.5Cel, SQUARE, SURFACE MOUNT |
| 封裝： | LEAD FREE, MO-187-BA, MSOP-10 |
| 文件頁(yè)數(shù)： | 1/24頁(yè) |
| 文件大?。?/td> | 335K |
| 代理商： | ADT7482ARMZ-RL |
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Dual Channel Temperature Sensor
and Overtemperature Alarm
ADT7482
2008 SCILLC. All rights reserved.
Publication Order Number:
February 2008 – Rev. 1
ADT7482/D
FEATURES
1 local and 2 remote temperature sensors
0.25°C resolution/1°C accuracy on remote channels
1°C resolution/1°C accuracy on local channel
Automatically cancels up to 1.5 kΩ (typ) of resistance in
series with the remote sensors
Extended, switchable temperature measurement range 0°C
to +127°C (default) or 55°C to +150°C
2-wire SMBus serial interface with SMBus alert support
Programmable overtemperature/undertemperature limits
Offset registers for system calibration
Up to 2 overtemperature fail-safe THERM outputs
Small, 10-lead MSOP package
240 μA operating current, 5 μA standby current
APPLICATIONS
Desktop and notebook computers
Industrial controllers
Smart batteries
Automotive
Embedded systems
Burn-in applications
Instrumentation
GENERAL DESCRIPTION
The ADT74821 is a three-channel digital thermometer and
undertemperature/overtemperature alarm for PCs and thermal
management systems. It can measure the temperature in two
remote locations, such as in the remote thermal diode in a CPU
or GPU, or using a discrete diode connected transistor. This
device also measures its own ambient temperature.
One feature of the ADT7482 is series resistance cancellation
where up to 1.5 kΩ (typical) of resistance in series with each of
the temperature monitoring diodes can be automatically
cancelled from the temperature result, allowing noise filtering.
The temperature of the remote thermal diodes and ambient
temperature can be measured accurate to ±1°C. The tempera-
ture measurement range, which defaults to 0°C to 127°C, can be
switched to a wider measurement range of from 55°C to +150°C.
The ADT7482 communicates over a 2-wire serial interface
compatible with system management bus (SMBus) standards.
The default address of the ADT7482 is 0x4C. An ALERT output
signals when the on-chip or remote temperature is outside the
programmed limits. The THERM output is a comparator output
that allows on/off control of a cooling fan. The ALERT output can
be reconfigured as a second THERM output if required.
1 Protected by U.S. Patents 5,195,827, 5,867,012, 5,982,221, 6,097,239,
6,133,753, 6,169,442, 7,010,440, other patents pending.
FUNCTIONAL BLOCK DIAGRAM
11-BIT ADC
RUN/STANDBY
BUSY
SRC
LI
M
IT
C
O
M
PA
R
A
TO
R
STATUS REGISTERS
INTERRUPT
MASKING
LOCAL TEMPERATURE
VALUE REGISTER
ON-CHIP
TEMPERATURE
SENSOR
ANALOG
MUX
EXTERNAL DIODES OPEN-CIRCUIT
SMBus INTERFACE
ADT7482
6
7
10
1
5
9
VDD
GND
SDATA
SCLK
8
D2+
D2–
3
2
D1+
D1–
ALERT/THERM2
CONFIGURATION
REGISTERS
LOCAL TEMPERATURE
HIGH-LIMIT REGISTER
LOCAL TEMPERATURE
LOW-LIMIT REGISTER
LOCAL TEMPERATURE
THERM-LIMIT REGISTER
CONVERSION RATE
REGISTER
ONE-SHOT
REGISTER
ADDRESS POINTER
REGISTER
DI
G
IT
A
LM
U
X
4
THERM
061
50-
00
1
REMOTE 1 AND 2 TEMP
VALUE REGISTERS
REMOTE 1 AND 2 TEMP
THERM-LIMIT REGISTERS
REMOTE 1 AND 2 TEMP
LOW-LIMIT REGISTERS
REMOTE 1 AND 2 TEMP
HIGH-LIMIT REGISTERS
REMOTE 1 AND 2 TEMP
VALUE REGISTERS
Figure 1.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADT7482ARMZ-RL7 | 功能描述:板上安裝溫度傳感器 2 CH TEMP SNSR/ALARM 2 WIRE SMBUS INTRFCE 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 |
| ADT7483A | 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:Dual Channel Temperature Sensor and Over Temperature Alarm |
| ADT7483AARQZ | 功能描述:板上安裝溫度傳感器 2 TEMP DIODE MONITOR 2 WIRE SMBUS INTRFCE 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 |
| ADT7483AARQZ-R7 | 功能描述:板上安裝溫度傳感器 2 TEMP DIODE MONITOR 2 WIRE SMBUS INTRFCE 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 |
| ADT7483AARQZ-REEL | 功能描述:IC TEMP SENSOR/ALARM 3CH 16-QSOP RoHS:是 類(lèi)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(lèi)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(kù) 輸出類(lèi)型:2 線 SMBus? 輸出警報(bào):無(wú) 輸出風(fēng)扇:無(wú) 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 125°C 安裝類(lèi)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(chēng):296-22675-6 |
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