Analog Devices Inc. AD4130-8 Ultra Low Power 24-Bit Sigma-Delta ADC


Analog Devices Inc. AD4130-8 Ultra Low Power 24-Bit Sigma-Delta ADC is a high precision measurement solution for low bandwidth battery-operated applications. The AD4130-8 features a fully integrated analog front end (AFE). It includes a multiplexer for up to 16 single-ended or eight differential inputs. The device also has a programmable gain amplifier (PGA), 24-bit sigma-delta (Σ-Δ) analog-to-digital converter (ADC), on-chip reference, and oscillator. These features improve the battery-operated lifetime, first in, first out (FIFO) buffer, and duty cycling.

Features

  • Ultralow current consumption (typical):
    • 32µA continuous conversion mode (gain = 128)
    • 5µA duty cycling mode (ratio = 1/16)
    • 0.5µA standby mode
    • 0.1µA power-down mode
  • Built-in features for system-level power savings
    • Current saving duty cycle ratio is 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 1.71V increasing battery length
  • RMS noise 25nV rms at 1.17 SPS (gain = 128) – 48nV/√Hz
  • Up to 22 noise-free bits (gain = 1)
  • Output data rate 1.17 SPS to 2.4 kSPS
  • Operates from 1.71V to 3.6V single supply or ±1.8V split supplies
  • Band gap reference with 15ppm/°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 50Hz/60Hz rejection (on selected filter options)
  • General-purpose outputs
  • Diagnostic functionality
  • Crosspoint multiplexed inputs
    • Eight differential/16 pseudo differential inputs
  • 5MHz SPI (3-wire or 4-wire)
  • Available in 35-ball, 2.74mm × 3.6mm WLCSP
  • Temperature range −40°C to +105°C

Block Diagram

more information: https://www.analog.com/en/products/ad4130-8.html



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