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| 型号： | MAX6673AXK+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 4/6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
Typical Operating Characteristics (continued)
(V CC = 3.3V, T A = +25 ° C, unless otherwise noted.)
THERMAL RESPONSE
IN STIRRED OIL BATH
OUTPUT SINK CURRENT
vs. TEMPERATURE
MAX6673 OUTPUT SOURCE CURRENT
vs. TEMPERATURE
100
30
V OL = 0.4V
3.0
V OH = V CC - 0.5V
25
2.5
75
20
V CC = 5V
2.0
V CC = 5V
15
V CC = 3.3V
1.5
50
25
TRANSITION FROM +25 ° C AIR
TO +100 ° C STIRRED OIL BATH
10
5
0
1.0
0.5
0
V CC = 3.3V
0
4
8
12
16
20
-50
-25
0
25
50
75
100
125
-50
-25
0
25
50
75
100
125
TIME (s)
TEMPERATURE ( ° C)
TEMPERATURE ( ° C)
Pin Description
PIN
1
2
3, 4
5
NAME
DOUT
N.C.
GND
V CC
FUNCTION
Digital Output Pin. PWM output, open-drain output (MAX6672), or push-pull output (MAX6673).
No Connection. Not internally connected.
Pin 3 and Pin 4 must be tied together and connected to ground.
Positive Supply. Bypass with a 0.1μF capacitor to GND.
Detailed Description
The MAX6672/MAX6673 are low-current (60μA, typ),
local temperature sensors ideal for interfacing with μCs
or μPs. The MAX6672/MAX6673 convert their own tem-
perature into a ratiometric PWM output. The square-
wave output waveform time ratio contains the
temperature information. The output is a square wave
with a nominal frequency of 1.4kHz at +25 ° C. The tem-
perature is obtained with the following formula:
Temperature ( ° C) = -200 x (0.85 - t 1 / t 2 ) 3
+ (425 x t 1 / t 2 ) - 273
Where t 1 is a fixed value and t 2 is modulated with the
temperature. Table 1 lists time ratio vs. temperature.
For temperatures greater than +50 ° C, the temperature
error is primarily first order and the following equation
can be used:
Temperature ( ° C) = (425 x t 1 / t 2 ) - 273
The MAX6673 has a push-pull output. The rise and fall
times of the MAX6673 output are negligible with
respect to the period; therefore, errors caused by
capacitive loading are minimized.
The output load capacitance should be minimized in
MAX6672 applications because the sourcing current is
set by the pullup resistor. If the output capacitance
becomes too large, unequal rise and fall times distort
the pulse width, thus delivering inaccurate readings.
Applications Information
Pulse-Width Modulation
Interfacing with a μC
The Typical Application Circuit shows the MAX6672/
MAX6673 interfaced with a μC. In this example, the
MAX6672/MAX6673 convert the ambient temperature
to a PWM waveform. The μC reads the temperature by
measuring the t 1 and t 2 periods in software and hard-
ware. The only timing requirements are that the clock
frequency used for timing measurements is stable and
4
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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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