DESCRIPTION

RBic_dLite™ is a CMOS integrated circuit for highly acurate amplification and sensor-specific correction of bridge sensor signals.  Digital compensation of sensor offset, sensitivity, temperature drift and non-linearity is accomplished via an internal digital signal processor running a correction algorithm with calibration coefficients stored in a non-volatile EEPROM. 

The RBic_dLite™ is adjustable to nearly all piezoresistive bridge sensors.  Measured and corrected bridge values are provided at the SIG™ pin, which can be configured as an analog voltage output or as a one-wire serial digital output.

The digital one-wire interface can be used for a simple PC-controlled calibration procedure to program a set of calibration coefficients into an on-chip EEPROM.  The calibrated RBic_dLite™ and a specific sensor are mated digitally:  fast, precise and without the cost overhead associated with trimming by external devices or laser.  Integrated diagnostics functions make the RCic_dLite™ particularly well-suited for automative applications.

• Development kit available which includes development board, SOP8 samples, software and documentation
• Support for industrial mass calibration is available
• Quick circuit customization possible for large production volumes

FEATURES

• Digital compensation of sensor offset, sensitivity, temperature drift and non-linearity
• Programmable analog gain and digital gain; accomodates bridges with spans < 1 mV/V and high offset
• Many diagnostic features on chip (e.g. EEPROM signature, bridge connection checks, bridge short detection, power loss detection)
• Independently programmable high and low clipping level
• 24-bit customer ID field for module traceability
• Internal temperature compensation reference (no external components)
• Option for external temperature compensation with addition of single diode
• Fast power-up to data out response; output available 5 ms after power up 
• Output options: rail-to-rail analog output voltage, absolute analog voltage, digital one-wire-interface
• Supply voltage 2.7 to 5.5V, with external JFET 5.5V to 30V
• Current consumption, depending on programmed signal rate: 0.25 mA to 1mA
• Wide operational temperature: -50°C to +150°C
• Fast response time 1ms (typical)
• High voltage protection up to 30V with external JFET

BENEFITS

• No external trimming components required
• PC-controlled configuration and calibration via digital bus interface - simple, low cost
• High accuracy (±0.1% FSO @ -25 to +85°C; ±0.25% FSO @ -40 to +125°C)
• Single pass calibration - quick and precise

DOWNLOAD

• Data sheet:

  Download zmd31015.pdf