ADS124S06 Analog-to-Digital Converter (ADC)

By Texas Instruments 64

ADS124S06 Analog-to-Digital Converter (ADC)

Texas Instruments' ADS124S06 is a precision, 24-bit, delta-sigma (ΔΣ), ADC offering low power consumption and many integrated features to reduce system cost and component count in applications measuring small signal sensors.

This ADC features a configurable digital filter that offers low-latency conversion results and 50 Hz or 60 Hz rejection for noisy industrial environments. A low-noise, programmable gain amplifier (PGA) provides gains ranging from 1 to 128 to amplify low-level signals for resistive bridge or thermocouple applications. Additionally, these devices integrate a low-drift, 2.5 V reference that reduces printed circuit board (PCB) area. Finally, two programmable excitation current sources (IDACs) allow for easy and accurate RTD biasing.

An input multiplexer supports six inputs for the ADS124S06 that can be connected to the ADC in any combination for design flexibility. In addition, this device includes features such as sensor burn-out detection, voltage bias for thermocouples, system monitoring, and four general-purpose I/Os (GPIO).

  • Low power consumption: as low as 280 µA
  • Low-noise PGA: 19 nVRMS at gain = 128
  • Programmable gain: 1 to 128
  • Programmable data rates: 2.5 SPS to 4 kSPS
  • Simultaneous 50 Hz and 60 Hz rejection at ≤ 20 SPS with low-latency digital filter
  • Analog multiplexer with 6 independently selectable inputs
  • Internal reference: 2.5 V, 10 ppm/°C (max) drift
  • Digital supply: 2.7 V to 3.6 V
  • Operating temperature: -50°C to +125°C
  • Dual-matched programmable current sources for sensor excitation: 10 µA to 2,000 µA
  • Internal oscillator: 4.096 MHz, 1.5% accuracy
  • Internal temperature sensor
  • Extended fault detection circuits
  • Self-offset and system calibration
  • Four GPIOs
  • SPI compatible interface with optional CRC
  • Analog supply: unipolar (2.7 V to 5.25 V) or bipolar (±2.5 V)