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Texas Instruments ADS111x/ADS111x-Q1 16-Bit Delta-Sigma ADCs

Texas Instruments ADS111x/ADS111x-Q1 16-Bit Delta-Sigma Analog-to-Digital Converters (ADCs) are precision, low-power, I2C-compatible ADCs offered in a VSSOP-10 package and an ultra-small, leadless, X2QFN-10 package. The ADS111x/ADS111x-Q1 devices incorporate a low-drift voltage reference and an oscillator. The ADS1114/ADS1114-Q1 and ADS1115/ADS1115-Q1 also include a programmable gain amplifier (PGA) and a digital comparator. These features and a wide operating supply range make the ADS111x/ADS111x-Q1 well-suited for power- and space-constrained sensor measurement applications.

The ADS111x performs conversions at data rates of up to 860 samples per second (SPS). The PGA offers input ranges from ±256mV to ±6.144V, allowing precise large- and small-signal measurements. The ADS1115 features an input multiplexer (MUX) that allows two differential or four single-ended input measurements. Use the digital comparator in the ADS1114 and ADS1115 for under and overvoltage detection.

The ADS111x operates in either continuous-conversion mode or single-shot mode. The devices are automatically powered down after one conversion in single-shot mode; therefore, power consumption is significantly reduced during idle periods. The Texas Instruments ADS111x-Q1 devices are AEC-Q100 qualified for automotive applications.

Features

  • Packages
    • Ultra-Small X2QFN 2mm × 1.5mm × 0.4mm (RUG)
    • Small VSSOP 3mm x 3mm (DGS)
  • 2.0V to 5.5V wide supply range
  • 150µA low current consumption (Continuous-Conversion Mode)
  • Programmable data rate of 8SPS to 860SPS
  • Single-cycle settling
  • Internal low-drift voltage reference
  • Internal oscillator
  • I2C interface with four pin-selectable addresses
  • Four single-ended or two differential inputs (ADS1115/ADS1115-Q1)
  • Programmable comparator (ADS1114/ADS1114-Q1 and ADS1115/ADS1115-Q1)
  • –40°C to +125°C operating temperature range

Applications

  • Portable instrumentation
  • Battery voltage and current monitoring
  • Temperature measurement systems
  • Consumer electronics
  • Factory automation and process control

Datasheets

Simplified Block Diagrams

Block Diagram - Texas Instruments ADS111x/ADS111x-Q1 16-Bit Delta-Sigma ADCs
Published: 2009-09-14 | Updated: 2025-06-13