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參數(shù)資料
| 型號： | MAX6664AEE+T |
| 廠商： | Maxim Integrated |
| 文件頁數(shù)： | 8/24頁 |
| 文件大?。?/td> | 297K |
| 描述： | IC TEMP MON FAN CNTRL 16-QSOP |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,500 |
| 功能： | 風扇控制，溫度監(jiān)控器 |
| 傳感器類型： | 內(nèi)部和外部 |
| 感應(yīng)溫度： | -40°C ~ 125°C，外部傳感器 |
| 精確度： | ±2°C 本地（最大），±3°C 遠程（最大） |
| 拓撲： | ADC，多路復(fù)用器，寄存器庫，測速計 |
| 輸出類型： | I²C?/SMBus? |
| 輸出警報： | 是 |
| 輸出風扇： | 是 |
| 電源電壓： | 3 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SSOP（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 16-QSOP |
| 包裝： | 帶卷 (TR) |
The MAX6663 resets its INT output and some of the
status bits in the status register after responding to an
alert response address; however, if the error condition
that caused the interrupt is still present, INT is reassert-
ed on the next monitoring cycle. INT is maskable to
allow full control of ALERT conditions.
Temperature Measurement
The MAX6653/MAX6663/MAX6664 contain on-chip tem-
perature sensors to sense their own die (local) tempera-
tures. These devices can also measure remote
temperatures such as the die temperature of CPUs or
other ICs having on-chip temperature-sensing diodes, or
discrete diode-connected transistors as shown in the
Typical Operating Circuits. For best accuracy, the dis-
crete diode-connected transistor should be a small-signal
device with its collector and base connected together.
The on-chip ADC converts the sensed temperature and
outputs the temperature data in the format shown in
Tables 3 and 4. The temperature measurement resolution
is 0.125癈 for both local and remote temperatures. The
temperature accuracy is within ?癈 for remote tempera-
ture measurements from +60癈 to +100癈.
The Local Temperature Offset (0Dh) and Remote
Temperature Offset (0Eh) registers allow the measured
temperature to be increased or decreased by a fixed
value to compensate for errors due to variations in diode
resistance and ideality factor (see the Remote Diode
Considerations section). The reported temperature is the
measured temperature plus the correction value. Both the
measured temperature and the reported value are limited
by the sensors temperature range. For example, if a
remote thermal diode is being measured and its tempera-
ture is 135癈, the measured temperature is the maximum
value of 127.875癈. If the remote offset value is set to -
10癈, the reported value is 117.875癈, not 125癈.
The temperature conversion rate is programmable using
bits [4:2] of the fan filter register (23h) as shown in Table 5.
The DXN input is biased at 0.65V above ground by an
internal diode to set up the analog-to-digital inputs for a
differential measurement. The worst-case DXP-DXN dif-
ferential input voltage range is from 0.25V to 0.95V.
Excess resistance in series with the remote diode caus-
es about 0.5癈 error per ohm. Likewise, a 200礦 offset
voltage forced on DXP-DXN causes about 1癈 error.
High-frequency EMI is best filtered at DXP and DXN with
an external 2200pF capacitor. This value can be
increased to about 3300pF, including cable capacitance.
Capacitance higher than 3300pF introduces errors due to
the rise time of the switched current source.
Temperature Monitors and
PWM Fan Controllers
8 _______________________________________________________________________________________
Figure 3. SMBus Read Timing Diagram
SMBCLK
A
B
C
D
E F
G
H
I J
K
SMBDATA
t
SU:STA
t
HD:STA
t
LOW
t
HIGH
t
SU:DAT
t
HD:DAT
t
SU:STO
t
BUF
L
M
F = ACKNOWLEDGE BIT CLOCKED INTO MASTER
G = MSB OF DATA CLOCKED INTO MASTER
H = LSB OF DATA CLOCKED INTO MASTER
I = MASTER PULLS DATA LINE LOW
J = ACKNOWLEDGE CLOCKED INTO SLAVE
K = ACKNOWLEDGE CLEAR PULSE
L = STOP CONDITION, EXECUTED BY SLAVE
M = NEW START CONDITION
A = START CONDITION
B = MSB OF ADDRESS CLOCKED INTO SLAVE
C = LSB OF ADDRESS CLOCKED INTO SLAVE
D = R/W BIT CLOCKED INTO SLAVE
E = SLAVE PULLS SMBDATA LINE LOW
Table 3. Temperature Data High Byte Format
TEMP (?/SPAN>C)
DIGITAL
OUTPUT (癈)
DIGITAL OUTPUT
(BINARY)
130.00
+127
0111 1111
127.00
+127
0111 1111
126.00
+126
0111 1110
25.25
+25
0001 1001
0.50
0
0000 0000
0.00
0
0000 0000
-1
1111 1111
-125
1000 0011
-128
1000 0000
Diode fault
(short or open)
1000 0000
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)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:馬達/運動/點火控制器和驅(qū)動器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| MAX6665ASA40+ | 功能描述:馬達/運動/點火控制器和驅(qū)動器 Fan Controller Driver RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| MAX6665ASA40+T | 功能描述:馬達/運動/點火控制器和驅(qū)動器 Fan Controller Driver RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
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