ADL5205ACPZ-R7 datasheet(23/32 Pages) AD

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ADL5205

Data Sheet

Rev. 0 | Page 22 of 31

EVALUATION BOARD

OVERVIEW

The ADL5205-EVALZ evaluation board allows the manual

control of the ADL5205 device through the serial and the

parallel interface ports, as well as the control of the device

through the USB port on a Microsoft® Windows® PC via the

system demonstration platform (SDP) interface board. A 3.3 V

low dropout (LDO) voltage regulator supplies the logic circuits

when the device is running on a 5 V supply.

On-board baluns convert single-ended input signals to differential

form for input to the device and convert the differential output

signals of the device to single-ended form for output. To bypass

these baluns, rearrange the 0 Ω resistors on the board as described

in the Signal Inputs and Outputs section.

The ADL5205-EVALZ provides all of the support circuitry

required to operate the ADL5205 in its various modes and

configurations. Figure 62 shows the typical bench setup used to

evaluate the performance of the ADL5205.

POWER SUPPLY INTERFACE

The ADL5205-EVALZ evaluation board requires either a 3.3 V

or 5 V power supply, and an optional negative supply to pull

down the output common-mode dc level to match the ADCs

that require a lower common-mode level. If an external 3.3 V

supply is used, connect it to the test point labeled 3P3V. If a 5 V

supply is used, connect it to the test point labeled 5V. Similarly, if an

external negative supply is used, connect it to the VNEG test point

shown in Figure 62.

ADL5205

CHANNEL B

INPUTS

CHANNEL B

CONTROLS

CHANNEL A

INPUTS

CHANNEL A

OUTPUTS

SUPPLY

CLUSTER

VNEG

3.3V

CHANNEL B

OUTPUTS

CHANNEL A

CONTROLS

MODE

SWITCHES

PARALLEL

INTERFACE

SDP

INTERFACE

SERIAL

INTERFACE

Figure 62. ADL5205-EVALZ Evaluation Board

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