Sensing Signal Conditioner From Texas Instruments Features A Programmable Core
Texas Instruments introduced the industry’s highest resolution resistive sensing signal conditioner, enabling fast and precise 24-bit measurement of conditions such as pressure, strain, flow or liquid levels. The PGA900 signal conditioner offers a programmable core, enabling flexible linearization and temperature compensation for numerous resistive bridge sensing applications.
The PGA900 integrates two low-noise 24-bit analog-to-digital converters (ADCs) to enable high-resolution signal acquisition, a 14-bit digital-to-analog converter (DAC) to provide highly linear analog outputs, and a variety of output interfaces, including analog voltage, 4-20 mA current loop, SPI, I2C, UART, and one-wire interface (OWI), to give designers options for different application needs. The PGA900’s integrated power management accepts external power supply voltages from 3.3 V to 30 V.
Key features and benefits of the PGA900 resistive sensing conditioner
• Fast, precise sensor signal and temperature compensation: Integrates two 24-bit ADCs to provide high-resolution signal acquisition. Low-drift voltage reference of 10 ppm/°C, maximum, enables high accuracy across the -40°C to 150°C operating temperature range.
• Integrated 14-bit DAC: Enables highly linear analog outputs.
• User-programmable temperature and nonlinearity compensation algorithms: Integrated ARM® Cortex®-M0 core allows developers to use proprietary temperature and nonlinearity compensation algorithms to differentiate their end products.
• Simple calibration: One-wire interface allows communication, configuration and calibration through the power supply pin without using additional lines.
• Wide input voltage allows direct connection to the power supply: Integrated power management circuitry accepts input voltages ranging from 3.3 V to 30 V to simplify the design and provide reliability.
Tools and support to speed design
The PGA900 evaluation module (EVM) enables designers to quickly and easily evaluate the device’s performance and integrated features. The PGA900EVM is available from the TI store and authorized distributors for US$249.
