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

► Smart sequencer and per channel configuration minimizes

host processor load

► Deep embedded FIFO minimizes host processor load (depth

of 256 samples)

► Autonomous FIFO interrupt functionality, threshold detection

► 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

► Diagnostic functionality

► Crosspoint multiplexed inputs

► 4 differential/8 pseudodifferential inputs

► 5 MHz SPI (3-wire or 4-wire)

► Available in 32-lead, 5 mm × 5 mm LFCSP

► Temperature range: −40°C to +125°C (LFCSP)

► AD4129-4 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