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

Applications

Smart transmitters
Wireless battery and harvester-powered sensor nodes
Portable instrumentation

Temperature measurement thermocouple, RTD, thermistors
Pressure measurement bridge transducers
Healthcare and wearables

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

Features

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