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PGA309EVM-USB Software Overview

4.8Auto Calibrate Tab

The Auto Calibrate tab is used to calibrate a PGA309 module over temperature. This process can be done with a real-world sensor or with an emulated sensor. It is recommended that you first become familiar with the calibration process by using the sensor emulator. Once the user completely understands the calibration process, the user can connect a real-world sensor to the EVM.

Additionally, this tab contains several sub-tabs that are used to configure the PGA309 device for particular test applications. This section explains each sub-tab in detail.

4.8.1Sensor Definition Functions

Figure 19 shows the Sensor Definition sub-tab.

Figure 19. PGA309EVM-USB Software: Auto Calibrate Tab—Sensor Definition

Use the Sensor Definition sub-tab to configure the sensor emulator before starting the calibration process. If you are not using the sensor emulator, you can skip this tab. If you are using the sensor emulator, enter your sensor information in one of two different formats using the Select Data Mode option box.

Sensor Data Mode: Sensor Characteristics

Enter the sensor characteristics as they are typically given in product data sheets (that is, span, offset, drift, and nonlinearity values).

Sensor Data Mode: Raw Sensor Data

Enter sensor data that has been measured at three temperatures (room or ambient, hot, and cold).

SBOU084 –February 2010

PGA309EVM-USB

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Copyright © 2010, Texas Instruments Incorporated

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Texas Instruments PGA309EVM-USB manual Auto Calibrate Tab, Sensor Definition Functions

PGA309EVM-USB specifications

The Texas Instruments PGA309EVM-USB is an Evaluation Module designed specifically for the PGA309 Precision Analog Front End (AFE) family. This versatile and powerful device serves various applications in the realm of sensor signal conditioning, particularly for pressure sensors, temperature sensors, and other analog sensors requiring high precision.

One of the main features of the PGA309EVM-USB is its high-performance PGA309 device, which incorporates a programmable gain amplifier (PGA) allowing for flexible signal amplification. The PGA309 has a gain range from 1 to 128, enabling it to adapt to a wide array of sensor types and output levels. This flexibility is crucial for achieving optimal performance in diverse applications.

The module also leverages advanced analog and digital processing technologies, which enhance its capabilities. It integrates an onboard microcontroller, allowing users to easily configure settings, execute control algorithms, and manage data acquisition. The built-in USB interface simplifies the communication with a PC, making it straightforward to control the EVM through intuitive software provided by Texas Instruments.

Another significant characteristic of the PGA309EVM-USB is its highly accurate signal conditioning features, such as offset and gain calibration, which ensure minimized errors and improved measurement reliability. The device supports a variety of digital output configurations, including I2C and SPI, to allow easy integration into different system architectures.

In addition to its robust signal processing core, the PGA309EVM-USB is designed with user-friendly interfaces, making it suitable for both experienced engineers and those new to sensor design. The comprehensive software toolkit offers a graphical user interface (GUI) that enables real-time monitoring and adjustment of parameters, ensuring users can optimize their applications.

Furthermore, the device is designed for functionality in harsh environments, incorporating features to withstand temperature variations and electrical noise. This reliability adds value for applications in industrial automation, automotive systems, and medical devices.

In summary, the Texas Instruments PGA309EVM-USB stands out as a powerful tool for engineers looking to design and prototype high-precision sensor signal conditioning applications. With its programmable gain amplifier, advanced processing capabilities, and user-friendly interfaces, it represents a significant advancement in the field of analog signal processing, allowing for greater flexibility and accuracy in diverse applications.