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| 型号： | MCP3425A0T-E/CH |
| 厂商： | Microchip Technology |
| 文件页数： | 21/38页 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT I2C PROGBL SOT23-6 |
| 产品培训模块： | MCP3901 Analog Front End |
| 标准包装： | 1 |
| 位数： | 16 |
| 数据接口： | I²C，串行 |
| 转换器数目： | 1 |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 |
| 供应商设备封装： | SOT-23-6 |
| 包装： | 标准包装 |
| 输入数目和类型： | 2 个单端，双极；1 个差分，双极 |
| 产品目录页面： | 672 (CN2011-ZH PDF) |
| 配用： | MCP3425EV-ND - EVALUATION BOARD FOR MCP3425 |
| 其它名称： | MCP3425A0T-E/CHDKR |
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MCP3425
DS22072B-page 28
2009 Microchip Technology Inc.
FIGURE 6-7:
Example of Pressure
Measurement.
6.2.4
WHEATSTONE BRIDGE TYPE
SENSORS WITH SIGNAL
CONDITIONING
Wheatstone bridge is one of the most common
configurations in the sensor applications. Strain
gauges and pressure sensors are the common
examples. When the sensor output signal is small and
the common mode noise level is large, it needs a signal
conditioning circuit between the sensor and the
MCP3425. Figure 6-8 and Figure 6-9 show examples
of using the MCP6V01 (high precision auto-zeroed Op
Amp) for the sensor signal conditioning. Figure 6-8
shows the interface circuit with a minimum of
components between the sensor and the MCP3425,
but it is not symmetric, and therefore, the ADC input
becomes a single ended. On the other hand, the
Figure 6-9 has a symmetric and differential output, but
requires more components.
FIGURE 6-8:
Simple Signal Conditioning
Design with Asymmetric Circuit.
FIGURE 6-9:
High Performance Signal
Conditioning Design with Symmetric Circuit.
6.2.5
TEMPERATURE MEASUREMENT
shows
an
example
of
temperature
measurement using a thermistor. This example can
achieve a linear response over a 50
°C temperature
range. This can be implemented using a standard
resistor with 1% tolerance in series with the thermistor.
The value of the resistor is selected to be equal to the
thermistor value at the mid-point of the desired
temperature range.
FIGURE 6-10:
Example of Temperature
Measurement.
NPP301
MCP3425
VIN+
VIN-
VDD
VSS
1
2
3
4
5
6
SCL
SDL
10 F
0.1 F
R
VDD
TO MCU
(MASTER)
VDD
VDD
RR
100R
C
MCP6V01
VDD
0.2R
3k
Ω
MCP3425
20 k
Ω
1F
20 k
Ω
1F
VDD
1/2 MCP6V02
200
Ω
200
Ω
3k
Ω
3k
Ω
1F
RR
VDD
10 nF
200
Ω
MCP3425
200
Ω
10 k
Ω
Resistor
10 k
Ω
Thermistor
MCP3425
VIN+
VIN-
VDD
VSS
1
2
3
4
5
6
SCL
SDL
10 F
0.1 F
Rpull-up
VDD
TO MCU (MASTER)
VDD
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MCP3425A1T-E/CH | 功能描述:模数转换器 - ADC 18bit deltasigma ADC single channel, 4sps RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MCP3425A1TECH | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:16-Bit Analog-to-Digital Converter with I2C Interface and On-Board Reference |
| MCP3425A2T-E/CH | 功能描述:模数转换器 - ADC 18bit deltasigma ADC single channel, 4sps RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MCP3425A2TECH | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:16-Bit Analog-to-Digital Converter with I2C Interface and On-Board Reference |
| MCP3425A3T-E/CH | 功能描述:模数转换器 - ADC 18bit deltasigma ADC single channel, 4sps RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
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