SBAU448
September 2024
1
Description
Get Started
Features
Applications
6
1
Evaluation Module Overview
1.1
Introduction
1.2
Performance Development Kit Contents
1.3
Specification
1.4
Device Information
2
Hardware
2.1
EVM Analog Interface
2.1.1
ADC Analog Input Signal Path
2.1.2
Onboard ADC Reference
2.2
Power Supplies
3
Software
3.1
Digital Interfaces
3.1.1
multiSPITM SPI for ADC Digital IO
3.2
ADS8681WEVM-PDK Initial Setup
3.2.1
Default Jumper and Switch Settings
3.2.2
EVM Graphical User Interface (GUI) Software Installation
4
Implementation Results
4.1
ADS8681WEVM-PDK Operation
4.1.1
EVM GUI Global Settings for ADC control
4.1.2
Register Map Configuration Tool
4.1.3
Time Domain Display Tool
4.1.4
Histogram Tool
4.1.5
Spectral Analysis Tool
4.1.6
Linearity Analysis Tool
5
Hardware Design Files
5.1
ADS8681WEVM-PDK Schematic
5.2
PCB Layout
5.3
Bill of Materials
6
Additional Information
6.1
Trademarks
7
Related Documentation
Features
16-bit ADC with integrated analog front-end
High speed: 1MSPS
Software programmable input ranges
Bipolar differential ranges: ±12.288V, ±10.24V, ±6.144V, ±5.12V, and ±2.56V
Unipolar differential ranges: 0V–12.288V, 0V– 10.24V, 0V–6.144V, and 0V–5.12V
Analog supply (5V): 1.65V to 5V I/O supply
Constant resistive input impedance ≥ 1MΩ
Input bandwidth: 450kHz
Input overvoltage protection: up to ±20V
On-chip, 4.096V reference with low drift
Excellent performance:
DNL: ±0.6LSB; INL: ±0.6LSB
SNR: 80dB; THD: –95.5dB
ALARM feature with high, low threshold