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


Design files


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

  • 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
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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


Detailed schematic diagram for design layout and components


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


Includes TI products in the design and potential alternatives.

Precision ADCs

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

Data sheet: PDF | HTML
High-speed op amps (GBW ≥ 50 MHz)

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

Data sheet: PDF | HTML

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Evaluation board

ADS7042EVM-PDK — ADS7042 Ultra-Low-Power Ultra-Small-Size 12-Bit 1MSPS SAR ADC Performance Demonstration Kit (PDK)

The ADS7042 evaluation module (EVM) performance demonstration kit (PDK) is a platform for evaluating the 12-bit, ADS7042 successive approximation register (SAR) analog-to-digital converter (ADC).

The PDK includes the ADS7042 evaluation board, precision host interface (PHI) controller board, and (...)

User guide: PDF | HTML
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Technical documentation

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* User guide Three 12-Bit Data Acquisition Reference Designs Optimized for Low Power Jun. 11, 2014

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