ADS7142

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12-bit 140-kSPS 2-ch nanopower SAR ADC with 1.8-V operation in 1.5-mm x 2-mm QFN package

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Product details

Parameters

Resolution (Bits) 12 Number of input channels 2 Sample rate (Max) (kSPS) 140 Interface type I2C Architecture SAR Input type Pseudo-Differential, Single-Ended Multi-channel configuration Multiplexed Rating Catalog Reference mode Supply Input range (Max) (V) 3.6 Input range (Min) (V) 0 Features Comparator, Oscillator, Small Size Operating temperature range (C) -40 to 125 Power consumption (Typ) (mW) 0.0009 Analog voltage AVDD (Min) (V) 1.65 SNR (dB) 71.5 Analog voltage AVDD (Max) (V) 3.6 INL (Max) (+/-LSB) 1 Digital supply (Min) (V) 1.65 Digital supply (Max) (V) 3.6 open-in-new Find other Precision ADCs (<=10MSPS)

Package | Pins | Size

X2QFN (RUG) 10 3 mm² 1.5 x 2 open-in-new Find other Precision ADCs (<=10MSPS)

Features

  • 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

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open-in-new Find other Precision ADCs (<=10MSPS)

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 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.

open-in-new Find other Precision ADCs (<=10MSPS)
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Technical documentation

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
Description

BOOSTXL-ADS7142-Q1 is a platform for evaluating the performance of the ADS7142-Q1 successive approximation register (SAR) analog-to-digital converter (ADC), which is a nanopower, dual-channel, sensor monitor device. The evaluation kit includes the ADS7142-Q1 BoosterPack™ plug-in module (...)

Features
  • Hardware and software required for diagnostic testing, as well as accurate performance evaluation of ADS7142-Q1 SAR ADC
  • USB powered; no external power supply required
  • Pairs with MSP-EXP432E401Y LaunchPad™ development kit (sold separately), which provides a convenient communication (...)

Software development

SUPPORT SOFTWARE Download
SBAC172.ZIP (119203 KB)
SUPPORT SOFTWARE Download
SBAC201A.ZIP (48 KB)
SUPPORT SOFTWARE Download
SBAC245.ZIP (21 KB)

Design tools & simulation

SIMULATION MODELS Download
SBAM333.ZIP (45 KB) - IBIS Model
SIMULATION MODELS Download
SBAM349B.TSC (3089 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SBAM380.ZIP (12 KB) - TINA-TI Spice Model
SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SIMULATION TOOLS Download
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
document-generic User guide
CALCULATION TOOLS Download
Analog-to-digital converter (ADC) input driver design tool supporting multiple input types
ADC-INPUT-CALC ADC-INPUT-CALC is an online tool that provides support for designing the input buffer to an analog-to-digital converter (ADC). It offers 24 different op-amp based buffer circuits that can be used to drive an ADC input. The available topologies cover differential, single-ended and transformer-coupled (...)
CALCULATION TOOLS Download
Analog engineer's calculator
ANALOG-ENGINEER-CALC — The Analog Engineer’s Calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting op-amp gain with feedback (...)
Features
  • Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
    • Noise calculations
    • Common unit translation
  • Solves common amplifier circuit design problems
    • Gain selections using standard resistors
    • Filter configurations
    • Total noise for common amplifier configurations
  • (...)
DESIGN TOOLS Download
SBAC226.ZIP (99 KB)
GERBER FILES Download
SBAC238A.ZIP (16 KB)

Reference designs

REFERENCE DESIGNS Download
RTD replacement for cold junction compensation reference design in a temperature sensor
TIDA-010019 — Temperature-sensing applications that use a thermocouple (TC) require an accurate local temperature sensor to achieve high accuracy. Solutions for design challenges such as cold-junction compensation (CJC) or including an ultra-low power TC analog front-end are highlighted and addressed in this (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Battery and System Health Monitoring of Battery Powered Smart Flow Meters Reference Design
TIDA-01546 — This reference design showcases innovative solutions for battery and system health monitoring of battery-powered Smart Flow Meters.  The battery monitoring subsystem provides highly accurate energy measurement and State of Health(SOH) projections which forecast battery lifetime. The system (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Software-Configurable Cardiac Pacemaker Detection Module Reference Design
TIDA-010005 — This reference design implements a compact hardware-based circuit to detect the pacemaker pulse during ECG measurement. It provides indication of valid pace signal through a flag and onboard LED. This design enables the user to configure various parameters of the pace signal (amplitude, rise time (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
4 Channel Antenna LDO Reference Design with Digital Diagnostics and Integrated Protection
TIDA-01569 — This automotive reference design demonstrates an approach for powering remote, off-board loads, often over coaxial cables (i.e. "phantom power"). This design is capable of protecting against and digitally diagnosing different faults that off-board cabling is susceptible to. Reverse polarity, reverse (...)
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REFERENCE DESIGNS Download
Smart Thermostat Localized Heat Compensation for Ambient Temperature Sensing Reference Design
TIDA-01596 — Localized thermostat heat generation is a leading cause for incorrect ambient temperature sensing near the return air plenum. This ultimately leads to overshoot in the HVAC cycle, resulting in costly energy bills. This reference design addresses this common problem associated with thermostat design (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
X2QFN (RUG) 10 View options

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