Introduction; Channel 1 To Channel 6 Hardware Block Diagram - Texas Instruments ADS7066EVM-PDK User Manual

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Introduction

The ADS7066 EVM is a fully-assembled evaluation platform designed to highlight the ADS7066 features
and various modes of operation that make this device suitable for ultra-low-power, small-size sensor
monitor applications.
The accompanying Precision ADC Motherboard (PAMBoard) development kit is used as a USB-to-PC
GUI communication bridge. This kit also serves as an example implementation of a master microcontroller
(MCU) to communicate with the ADS7066 device through a serial-peripheral interface (SPI).
NOTE: The ADS7066 EVM requires an external master controller to evaluate the ADS7066 device.
The PAMBoard is controlled by commands received from the ADS7066 GUI, and returns data to the GUI
for display and analysis. If the PAMBoard is not used, the EVM plug-in module format allows for an
alternative external host to communicate with the ADS7066 by easily connecting through a pin header.
The ADS7066 device incorporates all required circuitry and components with the following features:
• ADS7066 small WCSP footprint, eight-channel ADC
• Analog input driving a circuit available on channel 0
• Onboard reference, REF6025, to provide low-noise 2.5-V voltage and set the full scale range
• External power-supply connection available to provide DVDD power supply instead of the USB power
• Adjustable linear regulator, TPS78001, to generate stable output voltage to AVDD from the 5-V USB
power from the PAMBoard
• SPI for communication and configuration of modes
Figure 2 shows the ADS7066EVM architecture, identifying the key components and blocks previously
listed.
AINx/GPIOx
SBAU342A – February 2020 – Revised June 2020
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1 k
330 pF
GND
Figure 2. Channel 1 to Channel 6 Hardware Block Diagram
Copyright © 2020, Texas Instruments Incorporated
DVDD
AVDD
5.0 V
CS
SCLK
ADS7066
Host MCU
SDI
SDO
ADS7066EVM-PDK Evaluation Module
Introduction
3.3 V
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