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参数资料
| 型号： | PGA309EVM |
| 厂商： | Texas Instruments, Inc. |
| 英文描述： | PGA309 Evaluation Module(PGA309评估模块) |
| 中文描述： | PGA309评估模块（PGA309评估模块） |
| 文件页数： | 37/53页 |
| 文件大小： | 4221K |
| 代理商： | PGA309EVM |
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Page 37 of 53
Figure 31: Simulate PGA309
9.0 PGA309 + Sensor Calibration Spreadsheet for Microsoft Excel
NOTE:
Refer to Section 1.2 to ensure that your version of Excel is properly configured before using the
PGA309 Calibration Spreadsheet for Microsoft Excel.
The PGA309EVM includes a Microsoft Excel spreadsheet that provides a way to perform a calibration of the
sensor module (PGA309 + sensor). The spreadsheet contains two parts:
Sensor Curve-Fitting Equations
Generation of Values for the PGA309 Temperature Lookup Table and Internal Register Settings.
The spreadsheet also contains VBA (Visual Basic for Applications) code that allows its integration with the
Board Control Software. These macros allow the user to exchange PGA309 settings between the program
and the spreadsheet and save the resulting EEPROM configuration file.
The flexibility and wide availability of Excel determined the platform for this solution. You are free to customize
the sensor curve-fit model to fit your sensor better. The only prerequisites are familiarity with Microsoft
Excel capabilities and some limited knowledge of Visual Basic for Applications.
9.1 Sensor Curve-Fitting Equations
The built-in equations approximate the sensor with
second order polynomials
for each of the sensor three
variables:
-
Span vs. temperature;
-
Zero offset vs. temperature ;
-
Output signal vs. sensor input variable: it will be simply called pressure from now on, but can also be
flow or another measured physical parameter.
The sensor curve-fit equation for this case is:
(Equation1)
(
3
2
1
0
,
p
k
T
k
T
k
k
T
p
K
bridge
+
+
+
+
=
where:
K
bridge
= bridge output function in V/V of excitation
p
= sensor input variable (pressure, etc.)
T
= temperature in degrees C
k
0
,
k
1
,
k
2
= offset polynomial coefficients (initial, first and second order drift)
k
3
,
k
4
= input variable sensitivity and non-linearity
k
5
,
k
6
= span first and second order temperature drift
This is the sensor model used in the PGA309 Calibration Spreadsheet.
)
(
) (
)
2
6
5
2
4
2
1
T
k
T
k
p
k
+
+
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PGA309EVM-EU | 功能描述:光学传感器开发工具 PGA309 Eval Mod- Wldwide RoHS:否 制造商:ams 工具用于评估: 接口类型: 最大工作温度: |
| PGA309EVM-US | 功能描述:光学传感器开发工具 PGA309 Eval Mod- US & Canada RoHS:否 制造商:ams 工具用于评估: 接口类型: 最大工作温度: |
| PGA309EVM-USB | 功能描述:放大器 IC 开发工具 PGA309 Eval Mod RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
| PGA309EVM-USB | 制造商:Texas Instruments 功能描述:ANALOG SIGNAL CONDITIONING EVAL. MODULE |
| PGA309-HT | 制造商:TI 制造商全称:Texas Instruments 功能描述:VOLTAGE OUTPUT PROGRAMMABLE SENSOR CONDITIONER |
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