Texas Instruments AFEDRI8201EVM, Руководство пользователя, Страница: 8 / 25

Overview
2
1 Overview
This user’s guide gives a general overview of the AFEDRI8201 evaluation
module (EVM), and provides a general description of the feature and functions
to be considered while using this module.
1.1 Purpose
The AFEDRI8201EVM is a platform for evaluating the AFEDRI8201 ADC with
digital downconverter under various signal, reference, and supply conditions.
This document should be used in combination with the EVM schematic
diagrams (see Figure 2, Figure 3, and Figure 4) and the supplied USB
interface drive software.
1.2 EVM Basic Functions
Analog input to the AFE is provided via external SMA connectors. The single-
ended input is converted into a differential signal at the input of the device. The
input path is transformer-coupled.
The EVM provides one external SMA connector for converting the single-
ended input to a differential AFE clock signal at the input of the device.
Digital outputs from the EVM are via two 40-pin connectors and two DSK
peripheral 80-pin connectors.
The AFE internal registers can be programmed using the onboard USB inter-
face module through a PC.
Power connections to the EVM are made through either a 5V DC supply, or
3.3V and 1.8V supplies.
1.3 Power Requirements
The EVM can be powered in one of two ways:
1) The EVM can be powered directly with a +5V supply if using the AC/DC
(+90V to +265V AC input/+5V DC output adapter) module; or
2) The EVM can be powered by lab power from +5V analog, 3.3V analog,
3.3V digital, and 1.8V digital supplies.
Voltage Limits
Exceeding the maximum input voltages can damage EVM
components. Undervoltage may cause improper operation of some
or all of the EVM components.