PS081 Resistance-to-Digital Converter

PS081 Resistance-to-Digital Converter

The PS081 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 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 signal converter with a 24-bit microprocessor. 

Additional elements like an LCD driver, 3K ROM with many complex pre-defined functions, 2k EEPROM program memory and an integrated 10kHz oscillator round off the device. A small amount of external components is sufficient to build a complete weighing electronic.

PS081 Resistance-to-Digital Converter

PS081 features and benefits


  • RMS noise 8.9nV SINC5, 5Hz
  • Up to 250000 peak-peak divisions (2mV/V strain)
  • Scalable udapte rate from <1Hz to 1000Hz
  • Resolution: 28-bit ENOB (RMS)
  • 24-bit internal microprocessor with 2 kB EEPROM
  • Internal LCD controller for 4×14, 3×15 and 2×16 segments
  • 4-wire serial SPI interface
  • Current consumption ~5µA PS081 itself at low current configuration
  • Power supply voltage: 2.1V to 3.6V


  • Single-chip solution for weighing applications
  • Converter, microcontroller and LCD controller in one chip
  • 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] 11.5
  • Max. Rate 1000
  • Operating Supply Range [V] 2.1 - 3.6
  • Interface SPI
  • CPU 24-bit
  • Memory 2k EEPROM
  • GPIO 21
  • Ambient Temperature Range [°C] -40 to +125
  • Package QFN56


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Evaluation kit

The PS081 evaluation kit 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.