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) to 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

FUNCTIONAL BLOCK DIAGRAM

? 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

? Diagnostic functionality

? Crosspoint multiplexed inputs

? 8 differential/16 pseudodifferential inputs

? 5 MHz SPI (3-wire or 4-wire)

? Available in 35-ball, 2.74 mm × 3.6 mm WLCSP

? Temperature range: ?40°C to +105°C

APPLICATIONS

? Smart transmitters

? Wireless battery and harvester powered sensor nodes

? Portable instrumentation

? Temperature measurement: thermocouple, RTD, thermistors

? Pressure measurement: bridge transducers

? Healthcare and wearables