TIPD168

Three 12-Bit Data Acquisition Reference Designs Optimized for Low Power and Ultra-Small Form Factor

TIPD168

Design files

Overview

This Verified Precision Design details the design procedure, simulated results, and showcases the actual performance of a 12-bit discrete data acquisition block using the ADS7042, optimized for extremely low power, small form factor applications for the following three different optimizations: 

Optimization #1: 12 bit, 500ksps optimized for current monitoring, battery monitoring, electromyography (EMG), skin impedance, and wearable fitness

Optimization #2: 12 bit, 1Msps  optimized for hard disc drives, motor control, motor encoders, optical encoders, and optical modules

Optimization #3: 12 bit, < 1ksps optimized for tilt, gyro, pressure, temperature, gas, chemical, blood glucose, low voltage (1.8V-3.3V, JESD8-7A), and DC sensor measurements

Features
  • Covers three different detailed implementations optimized for speed/power/performance
  • Contains Theory, Component Selection, Simulation, Schematic, PCB Layout, and Measured Performance Results for all three implementations
  • Includes detailed theory, calculations, and simulations of ADC drive circuitry
  • Demonstrated performance of ultra-low power (1mW) 12-bit SAR data acqusition
  • Features the ADS7042:  the world's smallest 12-bit SAR ADC

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDC606.ZIP (3506 K)

Detailed schematic diagram for design layout and components

TIDRAD7.PDF (104 K)

Detailed schematic diagram for design layout and components

TIDRAD8.PDF (93 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDC604.ZIP (3361 K)

Design file that contains information on physical board layer of design PCB

Products

Includes TI products in the design and potential alternatives.

Precision ADCs (<=10MSPS)

ADS704212-Bit 1MSPS Ultra-Low-Power Ultra-Small-Size SAR ADC With SPI Interface

Data sheet document-pdfAcrobat PDF open-in-new HTML
High-speed op amps (GBW>=50MHz)

OPA835Ultra Low Power, Rail to Rail Out, Negative Rail In, VFB Amplifier

Data sheet document-pdfAcrobat PDF

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Hardware

Evaluation board

ADS7042EVM-PDK – ADS7042 Evaluation Module

The ADS7042EVM-PDK is a platform for evaluation of the ADS7042 analog to Digital converter (ADC). The converter is an 12 bit single-ended Successive Approximation-Register (SAR) ADC with a maximum throughput of 1MSPS. The evaluation kit combines the ADS7042EVM board with a serial data capture card (...)

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Software

Support software

TIPD168 Simulation – TIDC605.ZIP (85 K)

Technical documentation

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Type Title Date
* User guide Three 12-Bit Data Acquisition Reference Designs Optimized for Low Power Jun. 11, 2014
Technical article How low can you go? How to reduce power consumption in data-acquisition systems May 27, 2016

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