參數(shù)資料
型號(hào)： MAX6647
廠商： Maxim Integrated Products, Inc.
英文描述： Quadruple 2-Input Positive-NAND Gate 20-LCCC -55 to 125
中文描述： +145°C、高精度、SMBus兼容、遠(yuǎn)端/本地傳感器，帶有過(guò)溫報(bào)警
文件頁(yè)數(shù)： 14/16頁(yè)
文件大?。?/td> 227K
代理商： MAX6647
MUX
REMOTE
LOCAL
ADC
2
CONTROL
LOGIC
SMBus
READ
WRITE
8
8
ADDRESS
DECODER
7
S
R
Q
DIODE
FAULT
DXP
DXN
SCLK
SDA
REGISTER BANK
COMMAND BYTE
REMOTE TEMPERATURE
LOCAL TEMPERATURE
ALERT THRESHOLD
ALERT RESPONSE ADDRESS
V
CC
S
R
Q
OVERT
GND
ALERT
MAX6646/MAX6647/MAX6649
OVERT THRESHOLD
Functional Diagram
M
When measuring the temperature of a CPU or other IC
with an on-chip sense junction, thermal mass has virtu-
ally no effect; the measured temperature of the junction
tracks the actual temperature within a conversion cycle.
When measuring temperature with discrete remote sen-
sors, smaller packages, such as SC70s or SOT23s,
yield the best thermal response times. Take care to
account for thermal gradients between the heat source
and the sensor, and ensure that stray air currents
across the sensor package do not interfere with mea-
surement accuracy.
Self-heating does not significantly affect measurement
accuracy. Remote-sensor self-heating due to the diode
current source is negligible. For the local diode, the
worst-case error occurs when autoconverting at the
fastest rate and simultaneously sinking maximum cur-
rent at the
ALERT
output. For example, with V
CC
=
5.0V, at a 4Hz conversion rate and with
ALERT
sinking
1mA, the typical power dissipation is:
5.0V x 500μA + 0.4V x 1mA = 2.9mW
J-A
for the 8-pin μMAX package is +221
°
C/W, so
assuming no copper PC board heat sinking, the result-
ing temperature rise is:
T = 2.9mW x +221
°
C/W = +0.6409
°
C
Even under nearly worst-case conditions, it is difficult to
introduce a significant self-heating error.
+145°C Precision SMBus-Compatible Remote/
Local Sensors with Overtemperature Alarms
14
______________________________________________________________________________________
相關(guān)PDF資料
PDF描述
MAX6649 +145∑C Precision SMBus-Compatible Remote/ Local Sensors with Overtemperature Alarms
MAX6646MUA +145∑C Precision SMBus-Compatible Remote/ Local Sensors with Overtemperature Alarms
MAX6647MUA +145∑C Precision SMBus-Compatible Remote/ Local Sensors with Overtemperature Alarms
MAX6649MUA +145∑C Precision SMBus-Compatible Remote/ Local Sensors with Overtemperature Alarms
MAX6648 Quadruple 2-Input Positive-NAND Gate 14-CDIP -55 to 125
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX6647MUA 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
MAX6647MUA+ 功能描述:板上安裝溫度傳感器 145C SMBus-Comp Remote/Local 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
MAX6647MUA+T 功能描述:板上安裝溫度傳感器 145C SMBus-Comp Remote/Local 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
MAX6647MUA-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
MAX6647YMUA+ 功能描述:板上安裝溫度傳感器 145C SMBus-Comp Remote/Local 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
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