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| 型號(hào)： | MCP3427-E/MF |
| 廠商： | Microchip Technology |
| 文件頁數(shù)： | 28/56頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 16BIT I2C PROGBL 10-DFN |
| 產(chǎn)品培訓(xùn)模塊： | MCP3901 Analog Front End |
| 標(biāo)準(zhǔn)包裝： | 120 |
| 位數(shù)： | 16 |
| 采樣率（每秒）： | 15 |
| 數(shù)據(jù)接口： | I²C，串行 |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 電壓電源： | 單電源 |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 10-VFDFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 10-DFN-EP（3x3） |
| 包裝： | 管件 |
| 輸入數(shù)目和類型： | 2 個(gè)差分，單極 |
| 產(chǎn)品目錄頁面： | 672 (CN2011-ZH PDF) |
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MCP3426/7/8
DS22226A-page 34
2009 Microchip Technology Inc.
Figure 6-7 shows an example of measuring both
pressure and temperature. The pressure is measured
by using NPP 301 (manufactured by GE NovaSensor),
and temperature is measured by a thermistor. The
pressure sensor output is 20 mV/V. This gives 100 mV
of full scale output for VDD of 5V (sensor excitation
voltage). Equation 6-3 shows an example of calculating
the number of output code for the full scale output of the
NPP301.
EQUATION 6-3:
EXPECTED NUMBER OF
OUTPUT CODE FOR
NPP301 PRESSURE
SENSOR
The thermistor temperature sensor can measure the
temperature range from -100°C to +300°C. The
resistance of the thermistor sensor decreases as
temperature
increases
(negative
temperature
forms a voltage divider with R1.
The thermistor sensor is simple to use and widely used
for the temperature measurement applications. It has
both linear and non-linear responses over temperature
range. R1 is used to adjust the linear region of interest
for measurement.
Expected
log
2
100 mV
62.5
μV
PGA
------------------
---------------------
= 10.6 bits for PGA = 1
= 11.6 bits for PGA = 2
= 12.6 bits for PGA = 4
= 13.6 bits for PGA = 8
Number of Output Code =
Where:
1 LSB
=
62.5 V with 16 Bit configuration.
1600
PGA
()
ln
2
()
ln
----------------------------------------
=
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