ZSC31015
General Documents
Brief Description
The ZSC31015 (RBicdLite™) is a CMOS integrated circuit for highly accurate 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 ZSC31015 is adjustable to nearly all piezo-resistive 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 PCcontrolled calibration procedure to program a set of calibration coefficients into an on-chip EEPROM.
The calibrated ZSC31015 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 ZSC31015 particularly well suited for automotive applications.
Key Features
- Digital compensation of sensor offset, sensitivity, temperature drift and non-linearity
- Programmable analog gain and digital gain; accommodates bridges with spans < 1mV/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 levels
- 24-bit customer ID field for module traceability
- Digital calibration and configuration via one-wire interface – quick and precise
- Internal temperature compensation reference (no external components)
- Option for external temperature compensation with addition of single diode
- Output options: rail-to-rail ratiometric analog voltage
(12-bit resolution), absolute analog voltage, digital one-wire-interface - Supply voltage 2.7 to 5.5V; with external JFET, 5.5 to 30V
- Fast power-up to data out response; output available 5ms after power up
- Current consumption depends on programmed sample rate; 1mA down to 250µA (typical)
- Operation temperature: –50°C to +150°C
- Fast response time: 1ms (typical)
- High voltage protection up to 30V with external JFET
Benefits
In addition to the benefits of the ZSC31010
- No external trimming components required
- PC-controlled configuration and calibration via one-wire interface – simple, low cost
- High accuracy (±0.1% FSO @ -25°C to 85°C, ±0.25% FSO @ -40°C to 125°C)
- Single pass calibration: quick and precise
- Suitable for battery powered applications
- Small SOP8 package
the ZSC31015 has the following additional features
- A higher pre-gain (96 instead of 48) allows calibrate sensor calibration for small input spans below 1mV/V
- Additional diagnostic functions (power loss, bridge connection, EEPROM signature etc.)
- External temperature measurement
- Output DAC with 12 Bit resolution (instead of 11Bit)
- 3 EEPROM registers for field use
- Output is short protected
- Programmable Clipping Levels for the digital/analog output
As a member of the Lite family the ZSC31015 is pin compatible (except the pin for external temperature). For evaluation the same board with specific ZSC31015 software can be used.
Applications
The ZSC31015 is used in:
- Appliances / Filter Check, Refrigerant, Pressure Monitoring
- Automotive / Airflow, Differential Pressure, Process Control
- Consumer / Blood Pressure Meters, PDAs, Mobile Phones
- Industrial / Process Control, Dataloggers
- Medical / Blood Pressure Meters, PDAs, Mobile Phones