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Texas Instruments ADS7142/ADS7142-Q1 Programmable Sensor Monitors

Texas Instruments ADS7142/ADS7142-Q1 Nanopower, Dual-Channel, Programmable Sensor Monitors optimize system power, reliability, and performance. The ADS7142/ADS7142-Q1 is a standalone Nanopower Sensor Monitor with a small form-factor ideal for cost-sensitive designs. The device autonomously monitors signals at 900nW and offers efficient host sleep and wake-up. Event-triggering interrupts per channel are administered on the ADS7142/ADS7142-Q1 using a digital windowed comparator with programmable high and low thresholds, hysteresis, and event counter. The Sensor Monitor comprises a dual-channel analog multiplexer in front of a successive approximation register analog-to-digital converter (SAR ADC). This monitor is followed by an internal data buffer with a one-shot mode for converting and capturing sensor data.

Data analysis runs deep with 16-bit accuracy in high-precision mode, buffering for fault diagnostics, and one-shot mode for fast data capture. The ADS7142/ADS7142-Q1 provides a wide operating range of 1.65V to 3.6V and is available in a 10-pin QFN package. This device is excellent for space-constrained and/or battery-powered applications due to its small form factor and low power consumption. The Texas Instruments ADS7142-Q1 devices are AEC-Q100 qualified for automotive applications.

Features

  • Efficient host sleep and wake-up
    • Autonomous monitoring at 900nW
    • 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
  • 1.5mm x 2mm small package size
  • Deep data analysis
    • Data buffer for fault diagnostics
    • High precision mode for 16-bit accuracy
    • One-shot mode for fast data capture
  • I2C™ interface
    • Compatible from 1.65V to 3.6V
    • Eight configurable addresses
    • Up to 3.4MHz (high speed)
  • Wide operating range
    • 1.65V to 3.6V analog supply 
    • –40°C to 125°C temperature range 

Applications

  • Sensor nodes for the 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

Datasheet

Functional Block Diagram

Block Diagram - Texas Instruments ADS7142/ADS7142-Q1 Programmable Sensor Monitors

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Published: 2018-02-08 | Updated: 2022-10-27