The ZMD31014 RBiciLite™ is a feature rich CMOS integrated circuit for high accuracy amplification and analog-to-digital conversion of a differential input signal. Perfect for low cost applications, the RBiciLite™ can perform offset, span, and 1st and 2nd order temperature compensation of the measured signal. Developed for correction of resistive bridge sensors, the ZMD31014 can also provide a corrected temperature output through an internal or external sensor measurement. Digital compensation of signal offset, sensitivity, temperature and non-linearity is accomplished via an internal digital signal processor running a correction algorithm. Calibration coefficients are stored in a highly reliable non-volatile EEPROM. Measured and corrected bridge values provided at the digital output pins can easily be configured as I²C or SPI. Programming of the ZMD31014 is made simple by the I²C interface and the PC-controlled calibration software provided in the ZMD development kit. The digital mating is fast and precise, eliminating the overhead normally associated with trimming external components and multi-pass calibration routines. Integrated diagnostics functions and low power stand-bymode make the RBiciLite™ attractive for a variety of battery operated applications, particularly ones involving the use of a microcontroller for networking sensors.

• Digital compensation of sensor offset, sensitivity, temperature drift and non-linearity
• Eight programmable analog gain and digital gain settings; accommodates bridges with spans < 1mV/V and high offset
• Internal or optional external temperature compensation for sensor correction and for corrected temperature out
• Diagnostic features (e.g., EEPROM signature, bridge connection checks, bridge short detection).
• 32-bit customer ID field for module traceability
• Digital single-pass calibration via I²C – quick and precise
• Fast power-up to data output response: 3ms
• Current consumption depends on programmed sample rate; as low as 200µA
• Low-power stand-by mode (<2µA) available
• 2nd order charge-balancing analog-to-digital converter provides low noise, 14-bit data at sample rates exceeding 2kHz
• High accuracy (±0.1% FSO @ 0 to 70°C;±0.25% FSO @ -40 to +125°C)

Simple PC-controlled confi guration and single-pass calibration via I²C interface saves time and cost

•   Eliminates need for external trimming components
•   Diagnostic features add safety to your application
•   Low-power stand-by mode lengthens battery life
•   Enables addressing of sensors for networking of multiple sensors

the ZMD31014 is used in:

• Appliances / Filter Check, Refrigerant, Pressure Monitoring
• Automotive / Airflow, Differential Pressure, Process Control
• Consumer / Bl ood Pressure Meters, PDAs, Mobile Phones
• Industrial / Process Control, Dataloggers
• Medical / Bl ood Pressure Meters, PDAs, Mobile Phones