DESCRIPTION

· The A17700 is a sensor interface IC designed for direct connection to strain gauges or other sensors in a Wheatstone bridge configuration.

· It amplifies and converts analog inputs to digital, applies low-pass filtering, and outputs ratiometric analog or digital SENT/PWM signals.

· Features include digital signal processing for temperature compensation and gain/offset trim, ensuring accurate and linear output.

· Includes a Manchester programming interface and on-chip EEPROM for calibration, supporting up to 100 read/write cycles.

· Advanced diagnostic functions support safety-critical applications.

· Available in a 24-pin 4 mm × 4 mm QFN package with wettable flank and exposed thermal pad.

FEATURES

· Direct interface with Wheatstone bridge for low noise, high accuracy measurements.

· On-chip Poly(4,4) compensation for temperature accuracy, covering IC and bridge.

· Supports polynomial compensation from Poly(1,1) to Poly(4,4).

· Ratiometric analog output for legacy systems.

· High bandwidth option for fast response applications.

· PWM output with optional diagnostics for fault identification.

· Configurable SENT output for temperature, diagnostics, and pressure data.

· Fast SENT for increased data rates.

· Manchester interface for programming via single OUT pin.

· Internal temperature sensor output via SENT protocol.

· Comprehensive diagnostics for safety-critical systems.

APPLICATIONS

· Ideal for use in safety-critical systems requiring precise sensor data processing and diagnostics.

· Suitable for applications needing fast response times and high data accuracy.

· Effective in environments where temperature compensation and signal linearity are crucial.

· Useful in legacy systems requiring ratiometric analog outputs.

· Applicable in industrial and automotive sectors for pressure and strain measurements.