AD9237 View Datasheet(PDF) - Analog Devices

Part Name

Description

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AD9237

12-Bit, 20 MSPS/40 MSPS/65 MSPS 3 V Low Power A/D Converter

Analog Devices 

AD9237

LFCSP EVALUATION BOARD

The typical bench setup used to evaluate the ac performance of

the AD9237 is shown in Figure 47. The AD9237 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 production. 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 AD9237 allows the user to optimize the

frequency response of the op amp for the application.

3V

–+

2.5V

2.5V

–+

5V

–+

REFIN

HP8644, 2V p-p

SIGNAL SYNTHESIZER

BAND-PASS

FILTER

10MHz

HP8644, 2V p-p

REFOUT CLOCK SYNTHESIZER

CLOCK

DIVIDER

AVDD GND DRVDD GND VDL

J1

ANALOG

IN

AD9237

EVALUATION BOARD

J2

ENCODE

VAMP

P12

Figure 47. LFCSP Evaluation Board Connections

DATA

CAPTURE

AND

PROCESSING

Rev. 0 | Page 22 of 28

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