Attain Fast And Precise 24-Bit Measurement With Resistive Signal Conditioner

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The new signal conditioner for resistive sensing application from TI enables fast and precise 24-bit measurement of conditions such as pressure, strain, flow or liquid levels. A signal conditioner is capable of manipulating signal in such a way that it meets the requirement of the next stage for further processing.

Referring to the product description, “The PGA900 can accommodate various sensing element types. It conditions its input signals by amplification and digitization through two analog front end channels. With the user programmed software in the on-chip ARM Cortex M0 processor, the PGA900 can perform linearisation, temperature compensation, and other user defined compensation algorithms. The conditioned signal can be output as ratiometric voltage, absolute voltage, 4- to 20-mA current loop or PWM. The data and configuration registers can also be accessed through SPI, I2C, UART, and two GPIO ports. In addition, the unique OWI allows communication and configuration through the power supply pin without using additional lines. The PGA900 operating voltage is from 3.3V to 30V and it can operate in temperatures from –40°C to 150°C.”

TI Resistive Sensing 01

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The PGA900 resistive sensing conditioner is worldwide available in a 6mm x 6mm very thin quad flat no-lead (VQFN) package priced at US$ 4.50 in 1000-unit quantities, as mentions the company release.

Key features and benefits of the PGA900 resistive sensing conditioner as mentioned below:

  • 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/oC, maximum, enables high-accuracy across the -40o C to 150o C operating temperature range.
  • Integrated 14-bit DAC: Enables highly linear analog outputs.
  • User-programmable temperature and non-linearity compensation algorithms: Integrated ARM® Cortex®-M0 core allows developers to use proprietary temperature and non-linearity 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 3.3V to 30V to simplify the design and provide reliability.
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