Analog Devices Inc. AD7124-4BRUZ

Description
The AD7124-4 is a low noise, low power, 24-bit, sigma-delta analog-to-digital converter (ADC) with a programmable gain amplifier (PGA) and reference. It offers three power modes: low power, mid power, and full power, allowing users to optimize power consumption and noise performance. The ADC features rail-to-rail analog inputs, simultaneous 50 Hz/60 Hz rejection, and diagnostic functions that aid in safe integrity level (SIL) certification.

Features
Low noise: 24 nV rms at 1.17 SPS, gain = 128 (255 μA typical)
Up to 22 noise-free bits in all power modes (gain = 1)
Output data rate: 9.38 SPS to 19,200 SPS (full power), 2.34 SPS to 4800 SPS (mid power), 1.17 SPS to 2400 SPS (low power)
Programmable gain (1 to 128)
Band gap reference with 15 ppm/°C drift maximum (65 μA)
Internal clock oscillator
Low-side power switch
General-purpose outputs
Multiple filter options
Internal temperature sensor
Self and system calibration
Sensor burnout detection
Automatic channel sequencer
Per channel configuration
Power supply: 2.7 V to 3.6 V and ±1.8 V
Independent interface power supply
Power-down current: 5 μA maximum
Temperature range: -40°C to 105°C
32-lead LFCSP/24-lead TSSOP
3-wire or 4-wire serial interface (SPI, QSPI, MICROWIRE, DSP compatible)
Schmitt trigger on SCLK
ESD: 4 kV

Applications
Temperature measurement
Pressure measurement
Industrial process control
Instrumentation
Smart transmitters