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参数资料
| 型号： | MAX6682MUA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/9页 |
| 文件大小： | 0K |
| 描述： | IC THERMISTOR TO DGTL 8UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 温度传感器 |
| 输入类型： | 逻辑 |
| 输出类型： | 逻辑 |
| 接口： | 3 线 SPI 串行 |
| 电流 - 电源： | 29µA |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-uMAX |
| 包装： | 带卷 (TR) |
NTC thermistor is very nonlinear and can be described
by the following approximation:
1 / T = A + BlnR + C(lnR)3
where T is absolute temperature, R is the thermistor’s
resistance, and A, B, and C are coefficients that vary
with manufacturer and material characteristics. The
general shape of the curve is shown in Figure 1.
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, for example. However, by connecting the
thermistor in series with a properly chosen resistor and
using the MAX6682 to measure the voltage across the
resistor, a reasonably linear transfer function can be
obtained over a limited temperature range. Errors
decrease for smaller temperature ranges.
Figures 2 and 3 show typical thermistor nonlinearity
curves for a standard thermistor in conjunction with
series resistors chosen to optimize linearity over two
different temperature ranges: +10°C to +40°C and 0°C
to +70°C.
MAX6682
Thermistor-to-Digital Converter
_______________________________________________________________________________________
5
-2.5
-2.0
2.5
-0.5
-1.5
0
1.5
2.0
3.0
020
30
10
40
60
70
50
80
THERMISTOR NONLINEARITY
vs. TEMPERATURE
TEMPERATURE (°C)
LINEARITY
ERROR
(
°C)
0.5
1.0
-1.0
Figure 2. Thermistor Nonlinearity vs. Temperature for a Standard
Thermistor from 0°C to +70°C
*Assumes VR+ = 1.220V.
THERMISTOR
TEMPERATURE (°C)
VREXT (mV) WITH STANDARD
THERMISTOR AND REXT =
7680
*
DECIMAL VALUE OF DOUT
(1LSB = 0.125
°C)
DOUT
+60.000
921.6
+55.875
001 1011 1111
+50.000
830.6
+48.625
001 1000 0101
+40.000
720.5
+40.000
001 0100 0000
+30.000
595.4
+30.125
000 1111 0001
+25.000
530.1
+25.000
000 1100 1000
+20.000
464.4
+19.875
000 1001 1111
+10.000
339.7
+10.000
000 0101 0000
0
232.3
+1.500
000 0000 1100
-0.725
225.5
+1.000
000 0000 1000
-2.000
213.6
0.125
000 0000 0001
-5.000
187.4
-2.000
111 1111 0000
Table 1. Temperature vs. Digital Output for Standard Thermistor with REXT = 7680
0
20
40
60
80
100
120
-40
0
-20
20
40
60
80
100 120
THERMISTOR RESISTANCE
vs. TEMPERATURE
TEMPERATURE (°C)
THERMISTOR
RESISTANCE
(k
)
Figure 1. Thermistor Resistance vs. Temperature
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6683AUB | 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| MAX6683AUB+ | 功能描述:板上安装温度传感器 Temperature Sensor & System Monitor RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| MAX6683AUB+T | 功能描述:板上安装温度传感器 Temperature Sensor & System Monitor RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| MAX6683AUB-T | 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| MAX6683EVKIT | 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
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