PS09 Resistance-to-Digital Converter

PS09 Resistance-to-Digital Converter

The PS09 is a system on chip for ultra low power and high resolution applications.

It was designed especially for weight scales but fits also to any kind of force, pressure or torque measurements based on metal strain gauges.

It takes full advantage of the digital measuring principle of PICOSTRAIN. Thus, it combines the performance of a 28-bit converter with a 24-bit microprocessor.

PS09 Resistance-to-Digital Converter

PS09 features and benefits


  • RMS noise 11nV SINC5, 5Hz
  • Up to 80000 peak-peak divisions (2mV/V strain)
  • Scalable udapte rate from <1Hz to 10000Hz
  • Resolution: 28-bit ENOB (RMS)
  • 24-bit internal microprocessor with 8kB OTP
  • 4-wire serial SPI interface
  • Current consumption ~7µA PS09 itself at low current configuration
  • Power supply voltage: 2.1V to 3.6V


  • Small and compact solution for weighing applications
  • Converter and microcontroller in one chip
  • Perfectly suited for building digital load cells and consumer scales
  • Extreme low total system current (down to 15μA including strain gages)
  • Very low self heating of the sensor
  • Gain and offset correction of the load cell

Product properties

  • Half Bridges 4
  • Noise [nV@5V] 19
  • Max. Rate 10000
  • Operating Supply Range [V] 2.1 to 3.6
  • Interface SPI, I²C, UART
  • CPU 24-bit
  • Memory 8k OTP
  • GPIO 24
  • Ambient Temperature Range [°C] -40 to +125
  • Package QFN40


Download documents

Related products

Resistance-to-Digital Converter

PS081 Resistance-to-Digital Converter

Related Tools

Evaluation kit

The PS09 evaluation system provides a complete weighing system made of a main board with LCD panel, two plug-in modules, a 10kg load cell platform and Windows-based evaluation and assembler software.