- 您現(xiàn)在的位置：買賣IC網(wǎng) > Datasheet目錄43 > MAX6616AEG+T (Maxim Integrated)IC TEMP MON FAN CNTRL 24QSOP Datasheet資料下載
參數(shù)資料
| 型號： | MAX6616AEG+T |
| 廠商： | Maxim Integrated |
| 文件頁數(shù)： | 17/20頁 |
| 文件大小： | 194K |
| 描述： | IC TEMP MON FAN CNTRL 24QSOP |
| 產品培訓模塊： | 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： | 內部和外部 |
| 感應溫度： | 0°C ~ 140°C |
| 精確度： | ±1°C 本地（最大），±4°C 遠程（最大） |
| 拓撲： | ADC |
| 輸出類型： | I²C?/SMBus? |
| 輸出警報： | 無 |
| 輸出風扇： | 無 |
| 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： | 24-SSOP（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 24-QSOP |
| 包裝： | 帶卷 (TR) |
Applications Information
Thermistor Considerations
NTC thermistors are resistive temperature sensors
whose resistance decreases with increasing tempera-
ture. They are available in a wide variety of packages
that are useful in difficult applications such as measure-
ment of air or liquid temperature. Some can operate
over temperature ranges beyond that of most ICs. The
relationship between temperature and resistance in an
NTC thermistor is very nonlinear and can be described
by the following approximation:
where T is absolute temperature in Kelvin, R is the ther-
mistors resistance, and A, B, and C are coefficients that
vary with manufacturer and material characteristics.
The highly nonlinear relationship between temperature
and resistance in an NTC thermistor makes it somewhat
more difficult to use than a digital-output temperature-
sensor IC. However, by connecting the thermistor in
series with a properly chosen resistor and using the
MAX6615/MAX6616 to measure the voltage across the
resistor, a reasonably linear transfer function can be
obtained over a limited temperature range. Accuracy
increases over smaller temperature ranges.
Figures 9 and 10 show a good relationship between
temperature and data. This data was taken using a
popular thermistor model, the Betatherm 10K3A1, with
R
EXT
= 1.6k&. Using these values produces data with
good conformance to real temperature over a range of
about +30癈 to +100癈. Different combinations of ther-
mistors and R
EXT
result in different curves.
ADC Noise Filtering
The integrating ADC has inherently good noise rejec-
tion, especially at low-frequency signals such as
60Hz/120Hz power-supply hum. Lay out the PCB care-
fully with proper external noise filtering for high-accura-
cy thermistor measurements in electrically noisy
environments.
Filter high-frequency electromagnetic interference
(EMI) at TH_ and REF with an external 100pF capacitor
connected between the two inputs. This capacitor can
be increased to about 2000pF (max), including cable
capacitance. A capacitance higher than 2000pF intro-
duces errors due to the rise time of the switched cur-
rent source.
Chip Information
PROCESS: BiCMOS
1
3
T
A BIn R CIn R
= +
+
( ) [ ( )]
Dual-Channel Temperature Monitors and
Fan-Speed Controllers with Thermistor Inputs
______________________________________________________________________________________ 17
MAX6615/MAX6616 ERROR
-12
-10
-6
-8
0
2
-2
-4
4
0
40 60
20
80 100 120 140
TEMPERATURE (癈)
OPTIMIZED FOR +30癈 TO +100癈
Figure 9. Data Error vs. Temperature Using a Betatherm
10K3A1 Thermistor
0
40
20
80
60
100
120
-50
50
0
100
150
MEASUREMENT vs. TEMPERATURE
TEMPERATURE (癈)
Figure 10. Measured Temperature vs. Actual Temperature
相關PDF資料 |
PDF描述 |
|---|---|
| MAX6622UE9A+T | IC PREC TEMP MONITOR 5CH 16TSSOP |
| MAX6626RMTT+T | IC TEMP SENSOR I2C 6-TDFN |
| MAX6627MKA#TG16 | IC TEMP SENSOR DGTL SOT23-8 |
| MAX6636UP9A+T | IC PREC TEMP MONITOR 7CH 20TSSOP |
| MAX6639FATE+ | IC 2CH TEMP MONITOR 16TQFN |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6616EVKIT | 制造商:Maxim Integrated Products 功能描述:DUAL-CHANNEL TEMP MONITOR & FAN-SPE - Rail/Tube |
| MAX6618AUB+ | 功能描述:接口 - 專用 PECI-to-I2C Translator RoHS:否 制造商:Texas Instruments 產品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:BGA-59 |
| MAX6618AUB+G126 | 功能描述:接口 - 專用 PECI-to-I2C Translator RoHS:否 制造商:Texas Instruments 產品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:BGA-59 |
| MAX6618AUB+T | 功能描述:接口 - 專用 PECI-to-I2C Translator RoHS:否 制造商:Texas Instruments 產品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:BGA-59 |
| MAX6618AUB+TG11 | 功能描述:接口 - 專用 PECI-to-I2C Translator RoHS:否 制造商:Texas Instruments 產品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:BGA-59 |
發(fā)布緊急采購，3分鐘左右您將得到回復。