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AD9235

Data Sheet

Rev. D | Page 20 of 40

LFCSP EVALUATION BOARD

The typical bench setup used to evaluate the ac performance

of the AD9235 is similar to the TSSOP Evaluation Board

connections (refer to the schematics for connection details).

The AD9235 can be driven single-ended or differentially

through a transformer. Separate power pins are provided to

isolate the DUT from the support circuitry. Each input

configuration can be selected by proper connection of

various jumpers (refer to the schematics).

An alternative differential analog input path using an AD8351

op amp is included in the layout but is not populated in produc-

tion. Designers interested in evaluating the op amp with the

ADC should remove C15, R12, and R3 and populate the op amp

circuit. The passive network between the AD8351 outputs and

the AD9235 allows the user to optimize the frequency response

of the op amp for the application.

DATA

CAPTURE

AND

PROCESSING

–

REFIN

10MHz

REFOUT

HP8644, 2V p-p

SIGNAL SYNTHESIZER

HP8644, 2V p-p

CLOCK SYNTHESIZER

BAND-PASS

FILTER

XFMR

INPUT

CLOCK

AVDD

DUT

AVDD

GND

GND DUT

DRVDD

DVDD

AD9235

TSSOP EVALUATION BOARD

CLOCK

DIVIDER

Figure 43. TSSOP Evaluation Board Connections

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