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参数资料
| 型号： | MAX6664AEE+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 20/24页 |
| 文件大小： | 297K |
| 描述： | IC TEMP MON FAN CNTRL 16-QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 功能： | 风扇控制，温度监控器 |
| 传感器类型： | 内部和外部 |
| 感应温度： | -40°C ~ 125°C，外部传感器 |
| 精确度： | ±2°C 本地（最大），±3°C 远程（最大） |
| 拓扑： | ADC，多路复用器，寄存器库，测速计 |
| 输出类型： | I²C?/SMBus? |
| 输出警报： | 是 |
| 输出风扇： | 是 |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-QSOP |
| 包装： | 带卷 (TR) |
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 cables
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癈.
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 0.1礔 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
MODEL NO.
Central Semiconductor (USA)
CMPT3904
Rohm Semiconductor (USA)
SST3904
Samsung (Korea)
KST3904-TF
Siemens (Germany)
SMBT3904
Zetex (England)
FMMT3904CT-ND
Addr(H)
READ/WRITE POR STATE
DESCRIPTION
3D
R
0011 1000 Device ID
3E
R
0100 1101 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)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6664AEE-TG075 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX6665ASA070 | 制造商:Maxim Integrated Products 功能描述: |
| MAX6665ASA40 | 功能描述:马达/运动/点火控制器和驱动器 RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| MAX6665ASA40+ | 功能描述:马达/运动/点火控制器和驱动器 Fan Controller Driver RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| MAX6665ASA40+T | 功能描述:马达/运动/点火控制器和驱动器 Fan Controller Driver RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
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