• Digital measuring principle in CMOS technology
  
• Up to 2 full- or 4 half-bridges
  
• Capable of driving only a half-bridge without any loss in precision
  
• Resistance strain gauge: 350 Ohm - 10 kOhm
  
• Programmable resolution: Up to 18 Bit (40nV rms or 250,000 scale div) @ 2 mV/V strain and 5 Hz update rate
  
• High Measurement rate: Up to 15 kHz with high resolution (12.4 ENOB @ 4 kHz and 2 mV/V max. strain)
  
• Extremely low current consumption possible: Down to 15 µA (incl. SG) at 1 Hz and 10 ENOB with 1 kOhm SG and 1000 µ strain
  
• High stability with temperature, low gain error (1ppm/K)
  
• Wide offset range, no limitation by pre-amplifier
  
• No seperate supply of SG
  
• No separate reference voltage
  
• Optional Single-conversion mode
  
• Separate temperature measurement
  
• Optional capacitor measurement
  
• Serial interface (SPI compatible)
  
• Supply voltage I/O and SG: 1.8 ... 5.5 V
  
• Supply voltage PSØ2: 1.8 ... 3.6 V
• Compact TQFP48 package
  
• Op. temperature range -40°C ... +120°C
  

• Features
• Schematic Diagram
• Connecting the Bridge
• Capacitor Choice
• Comparator
• Oscillator
• Cycle Time
• Averaging/Resolution
• Rdson Compensation
• Gain Compensation
• Temperature Measurment
• Capacitor Measurement

Download datasheet as Acrobat PDF:
/
(~718 KB, Nov 2003)

Applications:

• Scales and load cells
  
• Force sensors
  
• Pressure sensors (also 4 - 20 mA)
  
• SG-amplifiers in general
  
• Solar cell driven devices
  
• Battery driven devices