PGA309ASPWT Description

The PGA309ASPWT is a programmable analog signal conditioner designed for bridge sensors. The analog signal path amplifies the sensor signal and provides digital calibration for zero, span, zero drift, span drift, and sensor linearization errors with applied stress (pressure, strain, etc.). The calibration is done via a One-Wire digital serial interface or through a Two-Wire industry-standard connection. The calibration parameters are stored in external nonvolatile memory (typically SOT23-5) to eliminate manual trimming and achieve long-term stability.

PGA309ASPWT Features

Complete Bridge Sensor Conditioner

Voltage Output: Ratiometric or Absolute

Digital Cal: No Potentiometers/Sensor Trims

Sensor Error Compensation - Span, Offset, and Temperature Drifts

Low Error, Time-Stable

Sensor Linearization Circuitry

Temperature Sense: Internal or External

Calibration Lookup Table Logic - Uses External EEPROM (SOT23-5)

Over/Under-Scale Limiting

Sensor Fault Detection

+2.7V TO +5.5V Operation

Small TSSOP-16 Package

PGA309ASPWT Applications

Bridge sensors

Remote 4-20mA transmitters

Strain, load, and weigh scales

Automotive sensors