●The PGA300 device provides an interface for piezoresistive and strain-gauge pressure-sense elements. The device is a full system-on-chip (SoC) solution that incorporates programmable analog front end (AFE), ADC, and digital signal processing that enable direct connection to the sense element. Further, the PGA300 device includes integrated voltage regulators and an oscillator, thus minimizing 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 (OWI) through the power-supply pin in order to simplify the system calibration process. An Integrated DAC supports absolute-voltage, ratiometric-voltage, and 4-mA to 20-mA current-loop outputs.
● Analog Features
● Analog Front-End for Resistive Bridge Sensors
● Accommodates Sensor Sensitivities From 1 mV/V to 135 mV/V
● On-Chip Temperature Sensor
● Programmable Gain
● 16-Bit Sigma-Delta Analog-to-Digital Converter for Signal Channel
● 16-Bit Sigma-Delta Analog-to-Digital Converter for Temperature Channel
● 14-Bit Output DAC
● Digital Features
● <0.1% FSO Accuracy Across Temperature
● System Response Time <220 µs
● Third-Order Offset, Gain, and Nonlinearity Temperature Compensation
● Diagnostic Functions
● Integrated EEPROM for Device Operation, Calibration Data and User Data
● Peripheral Features
● One-Wire Interface Enables Communication Through the Power Supply Pin Without Using Additional Lines
● 4-mA to 20-mA Current Loop Interface
● Ratiometric and Absolute Voltage Output
● Power Management Control
● Analog Low-Voltage Detect
● General Features
● Industrial Temperature Range: –40°C to 150°C
● Power Supply:
● On-Chip Power Management Accepts Wide Power-Supply Voltage From 3.3 V to 30 V
● Integrated Reverse-Protection Circuit
