- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383480 > MAX6653 (Maxim Integrated Products, Inc.) Temperature Monitors and PWM Fan Controllers PDF資料下載
參數(shù)資料
| 型號(hào)： | MAX6653 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Temperature Monitors and PWM Fan Controllers |
| 中文描述： | 溫度監(jiān)視器和PWM風(fēng)扇控制器 |
| 文件頁數(shù)： | 20/24頁 |
| 文件大?。?/td> | 297K |
| 代理商： | MAX6653 |
M
Temperature Monitors and
PWM Fan Controllers
20
______________________________________________________________________________________
Twisted-Pair and Shielded Cables
Use a twisted-pair cable to connect the remote sensor
for remote-sensor distances 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
shielded twisted pair like that used for audio micro-
phones. For example, Belden 8451 works well for dis-
tances 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 capacitance often provides noise filtering, so
the 2200pF capacitor can often be removed or reduced
in value.
Cable resistance also affects remote-sensor accuracy.
For every 1
of series resistance, the error is approxi-
mately 0.5
°
C.
PC Board Layout Checklist
Place the MAX6653/MAX6663/MAX6664 close to
the remote-sense junction.
Keep traces away from high voltages (+12V bus).
Keep traces away from fast data buses and CRTs.
Use recommended trace widths and spacings.
Place a ground plane under the traces.
Use guard traces flanking DXP and DXN and con-
necting to GND.
Place the noise filter and the 0.1μF V
CC
bypass
capacitors close to the MAX6653/MAX6663/
MAX6664.
Remote Diode Considerations
The accuracy of the remote temperature measurements
depends on the ideality factor (n) of the remote
“
diode
”
(actually a transistor). The MAX6653/MAX6663/
MAX6664 are optimized for n = 1.008, which is the typi-
cal value for the Intel Pentium III. A thermal diode on
the substrate of an IC is normally a PNP with its collec-
tor grounded. DXP should be connected to the anode
(emitter) and DXN should be connected to the cathode
(base) of this PNP.
When the remote-sensing diode is a discrete transistor,
its collector and base should be connected together.
Table 16 lists examples of discrete transistors that are
appropriate for use with the MAX6653/MAX6663/
MAX6664.
The transistor must be a small-signal type with a rela-
tively high forward voltage; otherwise, the A/D input
voltage range can be violated. The forward voltage at
Table 16. Remote-Sensor Transistor
Manufacturers
Note:
Discrete transistors must be diode connected (base
shorted to collector).
MANUFACTURER
Central Semiconductor (USA)
Rohm Semiconductor (USA)
Samsung (Korea)
Siemens (Germany)
Zetex (England)
MODEL NO.
CMPT3904
SST3904
KST3904-TF
SMBT3904
FMMT3904CT-ND
Addr(H)
3D
3E
READ/WRITE
R
R
POR STATE
0011 1000
0100 1101
DESCRIPTION
Device ID
Manufacturer ID
3F
R/W
1000 0000
THERM behavior/revision:
Bit [7]:
THERM behavior:
1: enable THERM as an output.
0: disable THERM as an output.
Bits [3:0]
revision number.
*For MAX6663 bit 7 has to be 1 all the time.
Register Summary (continued)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX6663 | Temperature Monitors and PWM Fan Controllers |
| MAX6664 | Temperature Monitors and PWM Fan Controllers |
| MAX6663AEE | RF CONNECTOR; 50 OHM REVERSE POLARITY BNC MALE RIGHT ANGLE, CLAMP ATTACHMENT FOR RG178 & RG196; *MEETS FCC PART 15.203 REQUIREMENTS* |
| MAX6664AEE | Temperature Monitors and PWM Fan Controllers |
| MAX6653AEE | HEX INVERTERS 20-LCCC -55 to 125 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6653AEE | 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 |
| MAX6653AEE+ | 功能描述:板上安裝溫度傳感器 Temperature Monitor & PWM Fan Controller 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 |
| MAX6653AEE+T | 功能描述:板上安裝溫度傳感器 Temperature Monitor & PWM Fan Controller 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 |
| MAX6653AEE-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 |
| MAX6653EVKIT | 功能描述:板上安裝溫度傳感器 Evaluation System/Evaluation Kit for the MAX6653 MAX6663 MAX6664 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。