Evaluation Board Circuitry - Analog Devices AD9653 User Manual

Jumper Description
This jumper selects between internal V
To choose the internal 1 V reference, connect Pin 3 (DUT_SENSE) to Pin 5 (GND).
To use the on-board
connect Pin 4 (DUT_VREF) to Pin 6 (EXT_REF).
J202
To apply a reference voltage from an external off-board source, connect Pin 2 (DUT_SENSE)
to Pin 1 (AVDD) and apply the reference voltage to Pin 4 (DUT_VREF). The AD9653 can
accommodate reference voltages from 1.0 V to 1.3 V; the AD9253 and AD9633 reference
voltage is specified to be 1.0 V.
Use this jumper to power down the ADC. Using the SPI, the PDWN pin can be configured to
J204
be STBY (standby).
This jumper sets the ADC for SPI communications with the HSC-ADC-EVALCZ.
J302
Connect Pin 1 to Pin 2 for SDIO, Pin 4 to Pin 5 for SCLK, and Pin 8 to Pin 9 for CSB.
J803 This jumper enables the on-board crystal oscillator.
Figure 2. Default Jumper Connections for

Evaluation Board Circuitry

This section explains the default and optional settings or modes allowed on the AD9653-125EBZ,
AD9253-125EBZ and the
ADR130 1 V reference, connect Pin 2 (DUT_SENSE) to Pin 1 (AVDD), and
AD9653-125EBZ/AD9253-125EBZ/AD9633-125EBZ
AD9633-125EBZ boards.
Rev 13 May 2013 17:57 | Page 5
and external V .
REF REF
Board