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参数资料
| 型号： | MAX6641AUB96+T |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 温度/湿度传感器 |
| 英文描述： | SMBus-Compatible Temperature Monitor with Automatic PWM Fan-Speed Controller |
| 中文描述： | DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 1Cel, SQUARE, SURFACE MOUNT |
| 封装： | 3 X 3 MM,LEAD FREE, MO-187C-BA, USOP-10 |
| 文件页数： | 8/19页 |
| 文件大小： | 538K |
| 代理商： | MAX6641AUB96+T |
Twisted-Pair and Shielded Cables
Use a twisted-pair cable to connect the remote sensor
for remote-sensor distance longer than 8in or in very
noisy environments. Twisted-pair cable lengths can be
between 6ft and 12ft before noise introduces excessive
errors. For longer distances, the best solution is a shield-
ed twisted pair like that used for audio microphones. For
example, Belden 8451 works well for distances up to
100ft in a noisy environment. At the device, connect the
twisted pair to DXP and DXN and the shield to GND.
Leave the shield unconnected at the remote sensor.
For very long cable runs, the cable’s parasitic capaci-
tance often provides noise filtering, so the 2200pF capac-
itor can often be removed or reduced in value. Cable
resistance also affects remote-sensor accuracy. For every
1
of series resistance, the error is approximately 0.5°C.
Thermal Mass and Self-Heating
When sensing local temperature, these devices are
intended to measure the temperature of the PC board
to which they are soldered. The leads provide a good
thermal path between the PC board traces and the die.
Thermal conductivity between the die and the ambient
air is poor by comparison, making air temperature mea-
surements impractical. Because the thermal mass of
the PC board is far greater than that of the MAX6641,
the devices follow temperature changes on the PC
board with little or no perceivable delay. When measur-
ing the temperature of a CPU or other IC with an on-
chip sense junction, thermal mass has virtually 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 MAXes, yield the
best thermal response times. Take care to account for
thermal gradients between the heat source and the
sensor, and ensure stray air currents across the sensor
package do not interfere with measurement accuracy.
Self-heating does not significantly affect measurement
accuracy. Remote-sensor self-heating due to the diode
current source is negligible.
MAX6641
SMBus-Compatible Temperature Monitor with
Automatic PWM Fan-Speed Controller
16
______________________________________________________________________________________
MINIMUM
10 mils
GND
DXN
DXP
GND
Figure 9. Recommended DXP-DXN PC Traces
MAX6641
GND
VCC (3.0V TO 5.5V)
SMBDATA
SMBCLK
DXP
DXN
5V
VFAN (5V OR 12V)
TO CLOCK
THROTTLE OR
SYSTEM
SHUTDOWN
PWMOUT
P
5V
2200pF
10k
EACH
10k
0.1
F
OT
Typical Application Circuit
Chip Information
TRANSISTOR COUNT: 18,769
PROCESS: BiCMOS
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6642ATT90 | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX6642ATT90+ | 制造商:Maxim Integrated Products 功能描述:TEMP SENSOR DGTL 2-WIRE 6TDFN EP - Rail/Tube |
| MAX6642ATT90+T | 功能描述:板上安装温度传感器 SMBus-Compatible Temperature Sensor RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| MAX6642ATT90T | 制造商:Maxim Integrated Products 功能描述: |
| MAX6642ATT90-T | 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
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