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| 型号： | MAX6673AXK+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 5/6页 |
| 文件大小： | 0K |
| 描述： | IC TEMP SENSOR PWM OUT SC70-5 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 感应温度： | -40°C ~ 125°C |
| 输出类型： | 数字，推挽式 |
| 电源电压： | 2.4 V ~ 5.5 V |
| 精确度： | ±3°C |
| 封装/外壳： | 6-TSSOP（5 引线），SC-88A，SOT-353 |
| 供应商设备封装： | SC-70-5 |
| 包装： | 标准包装 |
| 其它名称： | MAX6673AXK+TDKR |
PWM Output Temperature Sensors
in SC70 Packages
Table 1. Time Ratio vs. Temperature
TEMPERATURE
TIME RATIO
( ° C)
(t 1 /t 2 )
0.936
125
0.878
100
t 2
t 1
0.807
0.714
0.646
0.602
0.560
70
30
0
-25
-40
Figure 1. PWM Waveform Timing
5
Block Diagram
high enough to provide the required measurement res-
olution. The interface for the MAX6672 requires a pullup
V CC
resistor.
Thermal Response Time
TEMPERATURE
SENSOR
PWM
MODULATOR
DOUT 1
The time periods t 1 (low) and t 2 (high) are values that
are easily read by the μP timer/counter. The tempera-
ture reading is then calculated using software. Since
both periods are obtained consecutively, using the
same clock, performing the division indicated in the
above formulae results in a ratiometric value that is
independent of the exact frequency.
3, 4
GND
t 2
t 1
Sensing Circuit Board and Ambient
Temperatures
Temperature sensor ICs such as the MAX6672/
MAX6673 that sense their own die temperatures must
be mounted on or close to the object whose tempera-
ture they are intended to measure. Because there is a
good thermal path between the SC70 package ’ s metal
leads and the IC die, the MAX6672/MAX6673 can
accurately measure the temperature of the circuit
board to which they are soldered. If the sensor is
intended to measure the temperature of a heat-generat-
ing component on the circuit board, it should be mount-
ed as close as possible to that component and should
share supply and ground traces (if they are not noisy)
with that component where possible. This maximizes
the heat transfer from the component to the sensor.
The thermal path between the plastic package and the
die is not as good as the path through the leads, so the
MAX6672/MAX6673, like all temperature sensors in
plastic packages, are less sensitive to the temperature
of the surrounding air than they are to the temperature
of their leads. They can be successfully used to sense
ambient temperature if the circuit board is designed to
track the ambient temperature.
As with any IC, the wiring and circuits must be kept
insulated and dry to avoid leakage and corrosion,
especially if the part is operated at cold temperatures
where condensation can occur.
The error caused by power dissipation in the MAX6672/
MAX6673 is negligible.
Chip Information
TRANSISTOR COUNT: 601
PROCESS: BiCMOS
_______________________________________________________________________________________
5
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6673AXT-T | 制造商:Maxim Integrated Products 功能描述:PWM OUTPUT TEMPERATURE SENSORS IN SC70 PACKAG - Tape and Reel |
| MAX6674ISA | 功能描述:数据转换 IC - 多种 RoHS:否 制造商:Texas Instruments 转换器数量:1 分辨率:8 bit 工作电源电压:2.7 V to 5.5 V 功耗: 工作温度范围:- 40 C to + 85 C 封装 / 箱体:MSOP-10 封装:Reel |
| MAX6674ISA+ | 功能描述:数据转换 IC - 多种 K Thermocouple to Digital Converter RoHS:否 制造商:Texas Instruments 转换器数量:1 分辨率:8 bit 工作电源电压:2.7 V to 5.5 V 功耗: 工作温度范围:- 40 C to + 85 C 封装 / 箱体:MSOP-10 封装:Reel |
| MAX6674ISA+T | 功能描述:数据转换 IC - 多种 K Thermocouple to Digital Converter RoHS:否 制造商:Texas Instruments 转换器数量:1 分辨率:8 bit 工作电源电压:2.7 V to 5.5 V 功耗: 工作温度范围:- 40 C to + 85 C 封装 / 箱体:MSOP-10 封装:Reel |
| MAX6674ISA-T | 功能描述:数据转换 IC - 多种 RoHS:否 制造商:Texas Instruments 转换器数量:1 分辨率:8 bit 工作电源电压:2.7 V to 5.5 V 功耗: 工作温度范围:- 40 C to + 85 C 封装 / 箱体:MSOP-10 封装:Reel |
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