EVAL-AD7470CB Datasheet, PDF (6/14 Pages) Analog Devices – Evaluation Board for 10-bit high speed, low power, successive-approximation ADC

EVAL-AD7470CB
SOCKETS
There are four input sockets relevant to the operation of the
AD7470 on this evaluation board. The function of these
sockets is outlined in Table IV.
Socket
SK1
SK2
SK3
SK5
Table IV. Socket Functions
Function
Sub-Miniature BNC Socket for external clock
input.
Sub-Miniature BNC Socket for external
CONVST input.
Sub-Miniature BNC Socket for Bipolar ana-
log input The AD7470 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 AD7470 input range by the on-
board bias-up circuit before being applied to
the AD7470 VIN pin.
Sub-Miniature BNC Socket for unipolar ana-
log input. Analog inputs in the acceptable
AD7470 analog input range (0 V to REFIN)
are applied to this socket. The signal is then
buffered before it is applied to the AD7470
VIN pin.
CONNECTORS
There are four connectors on the AD7470 evaluation board
as outlined in Table V.
Table V. Connector Functions
Connector
J1
J2
J3
J4
Function
96-Way Connector for EVAL-CONTROL
BOARD interface connections.
External VDD, VSS & AGND power connec-
tor.
External VDRIVE & DGND power connec-
tor.
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 AD7470 are provided by
the EVAL-CONTROL BOARD when it is run under control
of the AD7470 software which is provided with the AD7470
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-AD7470CB 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-AD7470CB. 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.
–6–
REV. 0