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TIPD115

Data acquisition optimized for low distortion, low noise 18-bit 1-MSPS reference design

Design files

TIPD115

Design files

Overview

This verified design is a high performance data acquisition system (DAQ) using an 18-bit SAR ADC, ADS8881 at a throughput of 1MSPS. This design has been optimized to provide the lowest noise & distortion solution for a full scale input sinewave of 10 KHz. This leads to a maximum possible value for Effective Number of Bits (ENOB) at a total power consumption of less than 50mW. The input driver for the ADC uses the fully-differential THS4521 for extremely low distortion, noise and high small signal bandwidth. The reference buffer drive utilizes a composite buffer made out of THS4281 & OPA333 to get the desired performance at lowest power consumption.

Features
  • 18 Bit, 1Msps Sampling Rate
  • DC, 10kHz AC
  • Optimization: ENOB
  • Power: 50mW @ AVDD = 5V
  • Utilizes ADS8881 (18bit, 1Msps SAR ADC), THS4521 (Input), OPA333 + THS4281 + REF5045 (Reference)
This Verified Design Includes:
  • Theory
  • Component Selection
  • TINA-TI Simulation
  • Schematics and PCB Layout
  • Verification and Measured Performance
  • Modification Options
Download View video with transcript Video

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

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

download Bill of materials (BOM) — TIPD115
TIDR212.PDF (71 KB)

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

download Gerber file — TIPD115
TIDC159.ZIP (355 KB)

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

download Schematic — TIPD115
SLAC585.ZIP (959 KB)

Detailed schematic diagram for design layout and components

download Schematic — TIPD115
TIDR211.PDF (31 KB)

Detailed schematic diagram for design layout and components

Products

Includes TI products in the design and potential alternatives.

Precision ADCs

ADS8881 — 18-Bit, 1-MSPS, 1-Ch SAR ADC with True-Differential Input, SPI Interface and Daisy-Chain

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

THS4281 — Very Low-Power High Speed Rail-To-Rail Input/Output Voltage Feedback Operational Amplifier

Data sheet: PDF | HTML
Precision op amps (Vos<1mV)

OPA333 — Micropower, 1.8-V, 17-µA zero-drift CMOS precision operational amplifier

Data sheet: PDF | HTML
Precision ADCs

ADS9110 — 18-bit, 2-MSPS, one-channel SAR ADC with enhanced serial peripheral interface (SPI)

Data sheet: PDF | HTML
Fully differential amplifiers

THS4521 — Very low power rail-to-rail output fully differential amplifier

Data sheet: PDF | HTML
Series voltage references

REF50 — Low-noise, very low-drift, wide-VIN precision voltage reference

Data sheet: PDF | HTML

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Software

Support software

TIDC160 — TIPD115 Simulation

Supported products & hardware

Supported products & hardware

Hardware development
Reference design
TIPD115 — Data acquisition optimized for low distortion, low noise 18-bit 1-MSPS reference design
Download options

TIDC160 — TIPD115 Simulation

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Version: 01.00.00.00
Release date: Sep 19, 2013
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TIPD115 Simulation (zip)  — 123 K

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Hardware development
Reference design
TIPD115 — Data acquisition optimized for low distortion, low noise 18-bit 1-MSPS reference design

Release Information

The design resource accessed as www.ti.com/lit/zip/tidc160 or www.ti.com/lit/xx/tidc160/tidc160.zip has been migrated to a new user experience at www.ti.com/tool/download/TIDC160. Please update any bookmarks accordingly.
Support software

TIDC161 — TIPD115 Test Files

Supported products & hardware

Supported products & hardware

Hardware development
Reference design
TIPD115 — Data acquisition optimized for low distortion, low noise 18-bit 1-MSPS reference design
Download options

TIDC161 — TIPD115 Test Files

close
Latest version
Version: 01.00.00.00
Release date: Sep 19, 2013
open-in-new

View all versions

download

TIPD115 Test Files (zip)  — 462 K

SHA-256 checksum
Hardware development
Reference design
TIPD115 — Data acquisition optimized for low distortion, low noise 18-bit 1-MSPS reference design

Release Information

The design resource accessed as www.ti.com/lit/zip/tidc161 or www.ti.com/lit/xx/tidc161/tidc161.zip has been migrated to a new user experience at www.ti.com/tool/download/TIDC161. Please update any bookmarks accordingly.

Technical documentation

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Type Title Date
Technical article Go differential to differentiate your precision design PDF | HTML Aug 11, 2016
User guide 18-Bit 1-MSPS DAQ Optimized for Lowest Distortion and Noise Design Guide (Rev. A) Oct 13, 2015

Related design resources

Design tools & simulation

SIMULATION TOOL
TINA-TI — SPICE-based analog simulation program

Support & training

TI E2E™ forums with technical support from TI engineers

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