Datasheet

EVAL-AD7294
Rev. 0 | Page 4 of 24
LINKS
The link options on the evaluation board should be set for the required functionality prior to using the board. There are 20 link options,
the functions of which are outlined in Table 1. By default, power to the board is supplied through the USB port.
Table 1. Link Function Descriptions
Link No. Function
K1 This link option selects the source of the V
IN
0 analog input to the AD7294.
K1 inserted: the V
IN
0 analog input is tied directly to AGNDx.
K1 removed: the V
IN
0 analog input must be supplied by an external source via the V
IN
0 SMB socket.
K2 This link option selects the source of the V
IN
1 analog input to the AD7294.
K2 inserted: the V
IN
1 analog input is tied directly to AGNDx.
K2 removed: the V
IN
1 analog input must be supplied by an external source via the V
IN
1 SMB socket.
K3 This link option selects the source of the V
IN
2 analog input to the AD7294.
K3 inserted: the V
IN
2 analog input is tied directly to AGNDx.
K3 removed: the V
IN
2 analog input must be supplied by an external source via the V
IN
2 SMB socket.
K4 This link option selects the source of the V
IN
3 analog input to the AD7294.
K4 inserted: the V
IN
3 analog input is tied directly to AGNDx.
K4 removed: the V
IN
3 analog input must be supplied by an external source via the V
IN
3 SMB socket.
K5 This link option selects the source of the D1− current sensor input signal to the AD7294.
K5 in Position A: the D1− current sensor input signal is supplied by an external source via the D1− SMB socket.
K5 in Position B: the D1− current sensor input signal is tied directly to the D1+ signal and is therefore supplied by the
D1+ SMB socket.
K6 This link option selects the source of the D2− current sensor input signal to the AD7294.
K6 in Position A: the D2− current sensor input signal is supplied by an external source via the D2− SMB socket.
K6 in Position B: the D2− current sensor input signal is tied directly to the D2+ signal and is therefore supplied by the
D2+ SMB socket.
K7 This link option selects the source of the AS0 logic signal for addressing the device.
K7 inserted: the AS0 input is connected to DGND, a logic low signal.
K7 removed: the AS0 input is connected directly to V
DRIVE
, a logic high signal.
K8 This link option selects the source of the AS1 logic signal for addressing the device.
K8 inserted: the AS1 input is connected to DGND, a logic low signal.
K8 removed: the AS1 input is connected directly to V
DRIVE
, a logic high signal.
K9 This link option selects the source of the AS2 logic signal for addressing the device.
K9 inserted: the AS2 input is connected to DGND, a logic low signal.
K9 removed: the AS2 input is connected directly to V
DRIVE
, a logic high signal.
K10 This link option connects the DV
DD
supply to the AV
DD
x supplies.
K10 inserted: the DV
DD
supply is connected to the AV
DD
x supplies.
K10 removed: the DV
DD
supply is not connected to the AV
DD
x supplies.
K11 This link option connects the DAC OUTV+ AB and DAC OUTV+ CD supplies to the AV
DD
x supplies.
K11 inserted: the DAC OUTV+ AB and DAC OUTV+ CD supplies are connected to the AV
DD
x supplies.
K11 removed: the DAC OUTV+ AB and DAC OUTV+ CD supplies are not connected to the AV
DD
x supplies.
K12 This link option selects the source of the DV
DD
power supply.
K12 in Position A: the DV
DD
digital supply for the AD7294 is supplied by a 5 V supply from the USB port.
K12 in Position B: the DV
DD
digital supply for the AD7294 must be supplied by an external source via the J3-1
connector.
K13 This link option selects the source of the AV
DD
x power supplies.
K13 in Position A: the AV
DD
x analog supplies for the AD7294 are supplied by a 5 V supply from the USB port.
K13 in Position B: the AV
DD
x analog supplies for the AD7294 must be supplied by an external source via the J3-5
connector.
K14 This link option selects the source of the DAC OUTV+ xx power supplies.
K14 in Position A: the DAC OUTV+ AB and DAC OUTV+ CD supplies for the AD7294 are supplied by a 5 V supply from
the USB port.
K14 in Position B: the DAC OUTV+ AB and DAC OUTV+ CD supplies for the AD7294 must be supplied by an external
source via the J3-3 connector.