Datasheet

EVAL-AD7265/AD7266
Rev. 0 | Page 11 of 24
SOCKETS
There are 25 SMB input/output sockets relevant to the operation of
the AD7265/AD7266 on this evaluation board. All of these sockets
are used for applying an externally generated signal to the evalua-
tion board or for accessing an output signal from the AD7265/
AD7266. When operating the board with the EVAL-CED1Z
board, the only external sockets necessary are those used to
supply the analog input signals to the ADC (that is, V
A1
to V
A6
and V
B1
to V
B6
). All of the other sockets are optional and if they
are not used, their signals are supplied by the EVA L-CED1Z.
Most of these sockets are used when operating the board as a
standalone unit because all the signals required are supplied
from external sources. The functions of these sockets are
outlined in Table 8.
CONNECTORS
There are four connectors on the EVAL-AD7265/AD7266 as
outlined in Table 7.
Table 7. Connector Functions
Connector Function
J1 96-way connector for the digital interface and
power supply connections
J2 External V
DD
power connector
J3 External V
DRIVE
power connector
J30 External +12 V, −12 V and AGND power connector
Table 8. Socket Functions
Reference
Designator Socket Function
J5 EXT COM2 Subminiature BNC socket for an external common-mode voltage to be applied to U6.
J6 A0 Subminiature BNC socket for an external A0 logic level.
J7 A1 Subminiature BNC socket for an external A1 logic level.
J8 A2 Subminiature BNC socket for an external A2 logic level.
J9
CS
Subminiature BNC socket for an external
CS
signal.
J10 SCLK Subminiature BNC socket for an external SCLK input.
J11 DOUTA Subminiature BNC socket for the D
OUT
A output.
J12 DOUTB Subminiature BNC socket for D
OUT
B output.
J13 SVIN1 Subminiature BNC socket for a unipolar signal that is buffered by U3-A and applied to the ADC.
J14 SVIN2 Subminiature BNC socket for a unipolar signal that is buffered by U3-B and applied to the ADC.
J15 SVIN3 Subminiature BNC socket for a unipolar signal that is buffered by U4-A and applied to the ADC.
J16 SVIN4 Subminiature BNC socket for a unipolar signal that is buffered by U4-B and applied to the ADC.
J17 V1 DIFF Subminiature BNC socket for a bipolar or unipolar single-ended input that is applied to the single-ended-
to-differential conversion circuit (U5-B).
J18 EXT COM1 Subminiature BNC socket for an external common-mode voltage to be applied to U6.
J19 V2 DIFF Subminiature BNC socket for a bipolar or unipolar single-ended input that is applied to the single-ended-
to-differential conversion circuit (U6-B).
J20 V3 DIFF Subminiature BNC socket for a bipolar or unipolar single-ended input that is applied to the single-ended
to-differential conversion circuit (U7-B).
J21 EXT COM3 Subminiature BNC socket for an external common-mode voltage to be applied to U7.
J22 V4 DIFF Subminiature BNC socket for a bipolar or unipolar single-ended input that is applied to the single-ended
to-differential conversion circuit (U8-B).
J23 EXT COM4 Subminiature BNC socket for an external common-mode voltage applied to U8.
J24 DCAPA Subminiature BNC socket for an external reference voltage to be applied to D
CAP
A or to access the internal
reference from the AD7265/AD7266.
J25 DACPB Subminiature BNC socket for an external reference voltage to be applied to D
CAP
B or to access the internal
reference from the AD7265/AD7266.
J26 VIN A Subminiature BNC socket for a bipolar single-ended input to be applied to Bias-Up Circuit A.
J27 VIN B Subminiature BNC socket for a bipolar single-ended input to be applied to Bias-Up Circuit B.
J28 VBIASED-A Output from Bias-Up Circuit A, which can be applied to SVINx for single-ended mode of operation.
J29 VBIASED-B Output from Bias-Up Circuit B, which can be applied to SVINx for single-ended mode of operation.