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High-Resolution Resistive Sensing Signal Conditioner

Texas Instruments recently introduced the PGA900 high-resolution resistive sensing signal conditioner. The PGA900 enables the fast and precise 24-bit measurement of conditions such as pressure, flow, strain, or liquid levels. Its programmable core enables flexible linearization and temperature compensation for numerous resistive bridge sensing applications.TI PGA900

Key features and benefits include:

  • 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 to 30 V to simplify the design and provide reliability.

With the PGA900 evaluation module (EVM), you can to quickly and easily evaluate the device’s performance and integrated features. The PGA900EVM is available for $249. You can download PGA900 example software and the user’s guide, as well as the PSpice and TINA-TI Spice and TINA-TI models, at www.ti.com.

The PGA900 resistive sensing conditioner comes in a 6 mm × 6 mm very thin quad flat no-lead (VQFN) package. It costs $4.50 in 1,000-unit quantities.

Source: Texas Instruments


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