ADS7142/-Q1 Successive-Approximation Register (SAR) ADCs

Texas Instruments' SAR ADCs are ideal for applications such as wearables and IoT

Image of Texas Instruments' ADS7142/-Q1 SAR ADCTexas Instruments’ ADS7142/-Q1 12-bit, 140-kSPS SAR ADCs can autonomously monitor signals while maximizing system power, reliability, and performance. The automotive version ADS7142-Q1 is I2C-compatible with programmable threshold and host wake-up. These ADCs implement event-triggered interrupts per channel using a digital windowed comparator with programmable high and low thresholds, hysteresis, and event counter.

These devices include a dual-channel analog multiplexer in front of a SAR ADC followed by an internal data buffer for converting and capturing data from sensors. The ADS7142/-Q1 ADCs are available in a 10-pin QFN package and consume 900 nW of power. The small form-factor and low power consumption make these devices suitable for space-constrained and battery-powered applications.

Features
  • Efficient host sleep and wake-up
    • Autonomous monitoring at 900 nW
    • Windowed comparator for event-triggered host wake-up
    • Data buffering during host sleep
  • Independent sensor configuration and calibration
    • Dual-channel, pseudo-differential, or ground-sense input configuration
    • Programmable thresholds for calibration
    • Internal calibration improves offset and drift
  • False trigger prevention
    • Programmable thresholds per channel
    • Programmable hysteresis for noise immunity
    • Event counter for transient rejection
  • Standalone, nanopower sensor monitor for cost-sensitive designs
  • Small package size: 1.5 mm x 2 mm
  • Deep data analysis
    • Data buffer for false diagnostics
    • High-precision mode for 16-bit accuracy
    • One-shot mode for fast data capture
  • I2C interface
    • Compatible from 1.65 V to 3.6 V
    • Eight configurable addresses
    • Up to 3.4 MHz (high-speed)
  • Wide operating range
    • Analog supply: 1.65 V to 3.6 V
    • Temperature range: -40°C to +125°C
Applications
  • Sensor nodes for Internet of Things (IoT)
  • Gas, heat, PIR motion, and smoke detectors
  • Preventive maintenance for elevators, escalators, HVAC, industrial equipment, and so forth
  • Wearable electronics
  • Zero cross detection for fault indicators
  • Supervisory functions
  • Comparator with programmable reference
  • Sensors for deep learning artificial intelligence

ADS7142-Q1 Automotive SAR ADC

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
IC ADC 12BIT SAR 10WSONADS7142QDQCRQ1IC ADC 12BIT SAR 10WSON0View Details

ADS7142 SAR ADC

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
IC ADC 12BIT SAR 10X2QFNADS7142IRUGTIC ADC 12BIT SAR 10X2QFN0View Details

Evaluation Board

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
BOOSTXL-ADS7142-Q1BOOSTXL-ADS7142-Q1BOOSTXL-ADS7142-Q10View Details
Updated: 2019-12-17
Published: 2018-08-20