FUNCTIONAL BLOCK DIAGRAM

► Matched programmable excitation currents

► Internal clock oscillator

► On-chip bias voltage generator

► Low-side power switch

► General-purpose outputs

► Multiple filter options

► Internal temperature sensor

► Self and system calibration

► Sensor burnout detection

► Automatic channel sequencer

► Per channel configuration

► Power supply: 2.7 V to 3.6 V and ±1.8 V

► Independent interface power supply

► Power-down current: 5 μA maximum

► Temperature range: −40°C to +125°C

► 32-lead LFCSP

► 3-wire or 4-wire serial interface

► SPI, QSPI, MICROWIRE, and DSP compatible

► Schmitt trigger on SCLK

► ESD: 4 kV

FEATURES

► Functional safety approved to SC3 by TÜV Rheinland, File

Number 968/FSP 2188.01/23

► Three power modes

► RMS noise

► Low power: 24 nV rms at 1.17 SPS, gain = 128 (255 μA

typical)

► Mid power: 20 nV rms at 2.34 SPS, gain = 128 (355 μA

typical)

► Full power: 23 nV rms at 9.4 SPS, gain = 128 (930 μA typical)

► Up to 22 noise free bits in all power modes (gain = 1)

► Output data rate

► Full power: 9.38 SPS to 19,200 SPS

► Mid power: 2.34 SPS to 4800 SPS

► Low power: 1.17 SPS to 2400 SPS

► Rail-to-rail analog inputs for gains > 1

► Simultaneous 50 Hz/60 Hz rejection at 25 SPS (single cycle settling)

► Diagnostic functions (which aid safe integrity level (SIL) certification)

► Crosspoint multiplexed analog inputs

► 4 differential/7 pseudodifferential inputs

► Programmable gain (1 to 128)

► Band gap reference with 15 ppm/°C drift maximum (70 μA)

APPLICATIONS

► Temperature measurement

► Pressure measurement

► Industrial process control

► Instrumentation

► Smart transmitters