TIPD115: ADC, 18-Bit, 1MSPS, Low Noise Optimized

Summary

This design is for an 18-bit data acquisition block at 1MSPS throughput optimized for the lowest distortion and noise performance. The circuit is realized with an 18-bit successive-approximation-resistor (SAR) analog-to-digital converter (ADC), a fully differential input driver and a high precision reference and reference driver.

The design details the process for optimizing the precision front end drive circuit as well as the reference circuit to achieve excellent dynamic performance with the ADS8881 while consuming low power.

Specifications

Manufacturer Texas Instruments
Category Wired Communication
Sub-Category Analog Front Ends (AFE)
Eval Board Board not Stocked
Input Type ± 2.5 V
Input Channels 1
Resolution (Bits) 18 Bit
Sampling Rate 1 MSPS
Analog Outputs - N/A
Analog Output Type - N/A
Features Fully Differential Input Driver
High Precision Reference
Component Count + Extras 61 + 11
Design Author Texas Instruments
Main I.C. Base Part ADS8881
Date Created By Author
Date Added To Library 2015-06

Support Documents & Media

TIPD115 - User Guide ADS8881x - Datasheet TIPD115 - Simulation OPA333 - Datasheet

Media

TIPD115_Schematic_Full.png TIPD115_Board_Full.jpg TIPD115_Chart_1_Full.png TIPD115_Chart_2_Full.png TIPD115_Chart_3_Full.png TIPD115_Chart_4_Full.png