Signal conditioner and transmitter for pressure sensors

Texas Instruments’ PGA300 device provides an interface for piezoresistive and strain-gauge pressure-sense elements. The device is a full system-on-chip solution that incorporates programmable analog front end, ADC and digital signal processing that enable direct connection to the sense element. The PGA300 device also includes integrated voltage regulators and an oscillator, thus minimising the number of external components. The device achieves high accuracy by employing third-order temperature and nonlinearity compensation. External communication is achieved by using a one-wire serial interface through the power-supply pin in order to simplify the system calibration process. An Integrated DAC supports absolute-voltage, ratiometric-voltage, and 4mA to 20mA current-loop outputs.