Texas Instruments PGA300 Signal Conditioner & Transmitter
Texas Instruments PGA300 Signal Conditioner and Transmitter provides an interface for piezoresistive and strain-gauge pressure-sense elements. The device is a complete system-on-chip (SoC) solution incorporating programmable analog front end (AFE), ADC, and digital signal processing. These combined elements enable direct connection to the sensing element. The PGA300 also includes integrated voltage regulators and an oscillator, thus minimizing the number of external components. The Texas Instruments PGA300 achieves high accuracy by employing third-order temperature and nonlinearity compensation. External communication is performed using a one-wire serial interface (OWI) through the power-supply pin to simplify the system calibration process. An Integrated DAC supports absolute voltage, ratiometric voltage, and 4mA to 20mA current loop outputs.
Features
- Analog features
- Analog front-end for resistive bridge sensors
- Accommodates sensor sensitivities from 1mV/V to 135mV/V
- On-chip temperature sensor
- Programmable gain
- 16-bit sigma-delta analog-to-digital converter for the signal channel
- 16-bit sigma-delta analog-to-digital converter for a temperature channel
- 14-bit output DAC
- Digital features
- <0.1% FSO accuracy across temperature
- System response time < 220µs
- 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
- 4mA to 20mA current loop interface
- Ratiometric and absolute voltage output
- Power management control
- Analog low-voltage detect
- General features
- –40°C to 150°C industrial temperature range
- Power supply
- On-chip power management accepts wide power-supply voltage from 3.3V to 30V
- Integrated reverse-protection circuit
Applications
- Pressure transmitters
- Temperature transmitters
- Flow transmitters
- Level transmitters
Simplified Block Diagram
Additional Resources
發佈日期: 2017-02-28
| 更新日期: 2023-10-27