PGA300
Overview
The PGA300 provides an interface for piezoresistive and strain-gauge pressure-sense elements. The device is a full system-on-chip (SoC) solution that incorporates a programmable analog front-end (AFE), ADC, and digital signal processing that enable direct connection to the sense element.
- 1 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 temperature and nonlinearity 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 - 4-mA to 20-mA current-loop output - Ratiometric and absolute voltage output
- Power supply: - On-chip power management accepts wide power-supply voltage from 3.3 V to 30 V - Integrated reverse voltage protection circuit
- Industrial temperature range: -40°C to +150°C
