TIPD115
Data acquisition optimized for low distortion, low noise 18-bit 1-MSPS reference design
TIPD115
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)
- Theory
- Component Selection
- TINA-TI Simulation
- Schematics and PCB Layout
- Verification and Measured Performance
- Modification Options
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.
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
Design file that contains information on physical board layer of design PCB
Products
Includes TI products in the design and potential alternatives.
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Technical documentation
| Type | Title | Date | ||
|---|---|---|---|---|
| * | User guide | 18-Bit 1-MSPS DAQ Optimized for Lowest Distortion and Noise Design Guide (Rev. A) | Oct. 13, 2015 | |
| Technical article | Go differential to differentiate your precision design | PDF | HTML | Aug. 11, 2016 |
Related design resources
Design tools & simulation
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