TIPD168 Reference Design

Texas Instruments

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

Description

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 fitnessOptimization #2: 12 bit: 1Msps  optimized for hard disc drives: motor control: motor encoders: optical encoders: and optical modulesOptimization #3: 12 bit:

Features
  • Covers three different detailed implementations optimized for speed/power/performanceContains Theory: Component Selection: Simulation: Schematic: PCB Layout: and Measured Performance Results for all three implementationsIncludes detailed theory: calculations: and simulations of ADC drive circuitryDemonstrated performance of ultra-low power (1mW) 12-bit SAR data acqusitionFeatures the ADS7042:  the world's smallest 12-bit SAR ADC
Applications
  • Oscilloscopes & digitizers
  • Glass break detector
  • Multiparameter patient monitor
  • Fitness machine
  • Wearable fitness & activity monitor
  • Aircraft cockpit display
  • Interconnect/distribution box
  • Vector signal transceiver (VST)
  • Blood pressure monitor
  • Circuit breaker (ACB
  • MCCB
  • VCB)
  • Wireless communications test
Product Categories
  • Data converters

Parts

Part Number Name Companion Part
OPA314 OPA314 Buy Datasheet
OPA835 OPA835 Buy Datasheet

Bill Of Materials

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Schematic

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Test Data

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Other Documents

Title Updated Type Size (KB)
TIPD168 Gerber 08 Sep 2014 ZIP 3361
TIPD168 BOM 06 Sep 2014 PDF 93
TIPD168 Schematic 06 Sep 2014 PDF 104