ADS7142 Datasheet, PDF (1/58 Pages) Texas Instruments – Nanopower, Dual-Channel, Programmable Sensor Monitor

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ADS7142
SBAS773 – SEPTEMBER 2017
ADS7142 Nanopower, Dual-Channel, Programmable Sensor Monitor
1 Features
•1 Standalone, Nanopower Sensor Monitor for
cost-sensitive designs
• Small Package Size: 1.5 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, etc.
• 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
maximizing 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 dual-
channel 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 battery-
powered applications.
PART NAME
ADS7142
Device Information⁽¹⁾
PACKAGE
BODY SIZE (NOM)
X2QFN (10)
1.50 mm × 2.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Example System Architecture
Cloud
Bio
Blood
Glucouse
Temperature
Wake-up
Alert
! ^Sensor
Output ^ADS7142
MCU
Optical
Motion
Sensor
Node
Sensor
Node
! _Sensor
Node
Gateway
Sensor
Node
Sensor
Node
Sensor
Node
High
Threshold
Sensor
Output
Low
Threshold
System Data Capture
!
!
ADS7142 Samples
System Energy Consumption
MCU + Polling
with Internal
ADC
MCU + Event Trigger MCU + Event Trigger
with Comparator
with ADS7142
Copyright © 2017, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. ADVANCE INFORMATION for pre-production products; subject to
change without notice.