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參數(shù)資料
| 型號： | MAX6682MUA+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 5/9頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC THERMISTOR TO DGTL 8UMAX |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,500 |
| 類型： | 溫度傳感器 |
| 輸入類型： | 邏輯 |
| 輸出類型： | 邏輯 |
| 接口： | 3 線 SPI 串行 |
| 電流 - 電源： | 29µA |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-TSSOP，8-MSOP（0.118"，3.00mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-uMAX |
| 包裝： | 帶卷 (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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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6683AUB | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| MAX6683AUB+ | 功能描述:板上安裝溫度傳感器 Temperature Sensor & System Monitor RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| MAX6683AUB+T | 功能描述:板上安裝溫度傳感器 Temperature Sensor & System Monitor RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| MAX6683AUB-T | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| MAX6683EVKIT | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
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