EVAL-AD7472CB

–6–

REV. A

SOCKETS

There are four input sockets relevant to the operation of the

AD7472 on this evaluation board. The function of these

sockets is outlined in Table IV.

Table IV. Socket Functions

Socket

Function

SK1

Sub-Miniature BNC Socket for external clock

input.

SK2

Sub-Miniature BNC Socket for external

CONVST input.

SK3

Sub-Miniature BNC Socket for Bipolar ana-

log input The AD7472 can only accept analog

inputs in the range 0 V to REFIN. Bipolar

analog inputs in the range -1.25 V to +1.25 V

applied to this socket are biased up to the

acceptable

AD7472 input range by the on-

board bias-up circuit before being applied to

the AD7472 VIN pin.

SK5

Sub-Miniature BNC Socket for unipolar ana-

log input. Analog inputs in the acceptable

AD7472 analog input range (0 V to REFIN)

are applied to this socket. The signal is then

buffered before it is applied to the AD7472

VIN pin.

CONNECTORS

There are four connectors on the AD7472 evaluation board

as outlined in Table V.

Table V.

Connector Functions

Connector

Function

J 1

96-Way Connector for EVAL-CONTROL

BOARD interface connections.

J 2

External VDD, VSS & AGND power connec-

tor.

J 3

External VDRIVE & DGND power connec-

tor.

J 4

40-Way Connector for HIGH SPEED CON-

VERTER INTERFACE BOARD connec-

tions.

OPERATING WITH THE EVAL-CONTROL BOARD

The evaluation board can be operated in a stand-alone mode

or operated in conjunction with the EVAL-CONTROL

BOARD (with or without the HSC-INTERFACE BOARD).

This EVAL-CONTROL BOARD is available from Analog

Devices under the order entry "EVAL-CONTROL BOARD".

When interfacing directly to this control board, all supplies

and control signals to operate the AD7472 are provided by

the EVAL-CONTROL BOARD when it is run under control

of the AD7472 software which is provided with the AD7472

evaluation board package. This EVAL-CONTROL BOARD

will also operate with all Analog Devices evaluation boards

which end with the letters CB in their title.

The 96-way connector on the EVAL-AD7472CB plugs

directly into the 96-way connector on the EVAL-CON-

TROL BOARD. No power supplies are required in the

system. The EVAL-CONTROL BOARD generates all the

required supplies for itself and the EVAL-AD7472CB. The

EVAL-CONTROL BOARD is powered from a 12 V AC

transformer. This is a standard 12 V AC transformer capable

of supplying 1 A current and is available as an accessory from

Analog Devices under the following part numbers:

EVAL-110VAC-US:

For use in the U.S. or Japan

EVAL-220VAC-UK:

For use in the U.K.

EVAL-220VAC-EU:

For use in Europe

These transformers are also available for other suppliers

including Digikey (U.S.) and Campbell Collins (U.K.).

Connection between the EVAL-CONTROL BOARD and

the serial port of a PC is via a standard RS-232 cable which

is provided as part the EVAL-CONTROL BOARD pack-

age. Please refer to the manual which accompanies the

EVAL-CONTROL BOARD for more details on the EVAL-

CONTROL BOARD package.