GENERAL DESCRIPTION

The main function of the SX8722 is to acquire signal from Wheatstone bridges or single ended sensors.

The input can be a pressure sensor, a GMR or AMR magnetic sensor, a chemical sensor, a thermistor or a mix of several of these sensors.

The SX8722 Sensor interface is totally configurable through an I2C compatible interface.

Several parameters are configurable through this interface such as alarms or signal post processing.

KEY PRODUCT FEATURES

◆ 16 + 10 bits differential acquisition

◆ Preamplifier programmable gain up to 1000

◆ Sensor offset compensation up to 15 times full scale of input signal

◆ 4 differential or 7 single ended signal inputs

◆ 2 differential reference inputs

◆ I2C compatible connection to application

◆ Internal RC and 32 kHz Oscillators

◆ Low power modes

- Sleep

- Shutdown

◆ 4 Full configuration pre selections including:

- ZoomingADC? configuration

- 2 alarms with on & off thresholds

- Digital filtering

◆ I2C EEPROM interface

◆ Stand alone mode for alarm monitoring

◆ Clock out pin

◆ Calibration pin

◆ Reset pin

◆ Ready / Busy pin

APPLICATION

◆ Pressure sensing (industrial, altimeter, diving computer)

◆ Chemical sensing (monitoring, security)

◆ Magnetic sensing (compass)