FEATURES
► Ultra-low current consumption (typical)
► 32 μA: continuous conversion mode (gain = 128)
► 5 μA: duty cycling mode (ratio = 1/16)
► 0.5 μA: standby mode
► 0.1 μA: power-down mode
► Built-in features for system level power savings
► Current saving duty cycle ratio: 1/4 or 1/16
► Single supply as low as 1.71 V increasing battery length
► RMS noise: 25 nV rms at 1.17 SPS (gain = 128) – 48 nV/√Hz
► Up to 16 noise free bits (gain = 1)
► Output data rate: 1.17 SPS to 2.4 kSPS
► Operates from 1.71 V to 3.6 V single supply or ±1.8 V split supplies
► Band gap reference with 15 ppm/°C maximum drift
► PGA with rail-to-rail analog input
► Adaptable sensor interfacing functionality
► Matched programmable excitation currents for RTDs
► On-chip bias voltage generator for thermocouples
► Low-side power switch for bridge transducers
► Sensor open wire detection
► Internal temperature sensor and oscillator
► Self and system calibration
► Flexible filter options
► Simultaneous 50 Hz/60 Hz rejection (on selected filter options)
► General-purpose outputs
► Flexible sequencer
► Diagnostic functionality
► Crosspoint multiplexed inputs
► 4 differential/8 pseudodifferential inputs
► 5 MHz SPI (3-wire or 4-wire)
► Available in 35-ball, 2.7 mm × 3.56 mm WLCSP and 32-lead, 5mm × 5 mm LFCSP
► Temperature range: −40°C to +105°C (WLCSP), −40°C to +125°C (LFCSP)
► AD4131-4 LFCSP pin compatible with AD7124-4 LFCSP

APPLICATIONS
► Smart transmitters
► Wireless battery and harvester powered sensor nodes
► Portable instrumentation
► Temperature measurement: thermocouple, RTD, thermistors
► Pressure measurement: bridge transducers
► Healthcare and wearables