PGA309AIPWR
PGA309AIPWR - Programmable Sensor Conditioner | TI | 16-TSSOP
The PGA309AIPWR from Texas Instruments is a voltage output programmable analog signal conditioner designed specifically for resistive bridge sensors. It integrates a precision analog signal path with digital calibration capabilities, enabling correction of zero, span, zero drift, span drift, and sensor linearization errors. Housed in a 16-pin TSSOP (PW) package, this device operates over a temperature range of -40°C to +125°C, making it suitable for industrial and automotive environments.
A programmable sensor conditioner is an integrated circuit that amplifies and calibrates the small differential output of a bridge sensor, such as a strain gauge or pressure sensor, converting it into a linear, temperature-compensated voltage output. It sits between the sensor and the ADC or microcontroller, forming a complete sensor signal chain. This category falls under sensor interface ICs within the broader analog signal processing domain.
Key features include a programmable gain amplifier (PGA) with adjustable gain, a digital-to-analog converter (DAC) for offset and span calibration, and an internal temperature sensor for drift compensation. The device supports a supply voltage up to 5.5V and provides a ratiometric or absolute voltage output. Its digital interface allows in-system calibration via a two-wire serial interface, simplifying production trimming.
The PGA309 employs a chopper-stabilized amplifier architecture to achieve low offset and drift, ensuring high accuracy over temperature. The integrated calibration engine uses look-up tables to linearize the sensor response, reducing the need for external components. This architecture provides a complete, factory-calibrated solution that minimizes assembly cost and improves yield.
Typical applications include industrial pressure transmitters, automotive manifold absolute pressure (MAP) sensors, and precision weigh scales. The device's wide temperature range and programmable features make it ideal for harsh environments where sensor accuracy is critical.
When designing with the PGA309AIPWR, ensure proper decoupling of the supply pins and careful layout of the analog input traces to minimize noise. The calibration coefficients should be stored in an external EEPROM, as the device does not have non-volatile memory on-chip.
USD $4.38
In Stock
