1 Features

1• Standalone, Nanopower Sensor Monitor for

Cost-sensitive Designs

• Small Package Size: 1.5 mm x 2 mm

• 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

• 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 1.65 V to 3.6 V

– 8 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

2 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

3 Description

The ADS7142 autonomously monitors signals while

optimizing system power, reliability, and performance.

It implements event-triggered interrupts per channel

using a digital windowed comparator with

programmable high and low thresholds, hysteresis,

and event counter. The device includes a dualchannel

analog multiplexer in front of a successive

approximation register analog-to-digital converter

(SAR ADC) followed by an internal data buffer for

converting and capturing data from sensors.

The ADS7142 is available in 10-pin QFN package

and consumes only 900 nW of power. The small

form-factor and low power consumption make this

device suitable for space-constrained and/or batterypowered

applications.