Hardware Link Options - Analog Devices AD7366 User Manual

UG-408

HARDWARE LINK OPTIONS

There are 23 link options, which must be set for the required operating setup before using the evaluation board. The functions of these
options are outlined in Table 1. Table 1 shows the position in which all the links are set when the evaluation board is packaged. Jumper
and solder link (LKx) options must be set correctly to select the appropriate operating setup before using the evaluation board. The
default link positions are shown in Table 2 while the functions of these options are outlined in Table 1.
Table 1. Link Options
Link No. Function
LK1 Shorts input VA1 to ground when inserted.
LK2 Shorts input VA2 to ground when inserted.
LK3 Shorts input VB1 to ground when inserted.
LK4 Shorts input VB2 to ground when inserted.
SL1 VA1 Signal Selection.
Position A: Input signal is buffered by amplifier U3.
Position B: Input signal is passed directly to
SL2 VA1 Signal Selection.
Position A: Input signal is buffered by amplifier U4.
Position B: Input signal is passed directly to
SL3 VA1 Signal Selection.
Position A: Input signal is buffered by amplifier U5.
Position B: Input signal is passed directly to
SL4 VA1 Signal Selection.
Position A: Input signal is buffered by amplifier U6.
Position B: Input signal is passed directly to
LK5 AD780 Reference Output Voltage Selection.
Placed: VOUT = 3 V.
Unplaced: VOUT = 2.5 V.
LK6 DCAP_A Source Selection.
Position A: DCAP_A connected to LK9.
Position B: DCAP_A pin connected to external source via SMB socket DCAP-A.
LK7 DCAP_B Source Selection.
Position A: DCAP_B connected to LK9.
Position B: DCAP_B pin connected to external source via SMB socket DCAP-B.
LK8 BUSY Pin Connection to Level Shifter.
LK9 BIAS-UP Circuit Bias Voltage Selection. Bias voltage supplied to Pin 3 of U7 is sourced as follows:
Position A: DCAP_A (see LK6).
Position B: DCAP_B (see LK7).
Position C: U2 AD780
Ensure LK6 or LK7 is in the appropriate position.
LK11 VDRIVE Voltage Selection. Sets the voltage at the VDRIVE pin of the AD7366/AD7367.
Position A: VDRIVE connected to on-board 5 V.
Position B: Externally supplied voltage supplied via J1.
Position C: VDRIVE connected to on-board 3.3 V.
LK16 REFSEL Selection. Controls which internal or external reference voltage is used.
Position A: Internal reference voltage is selected.
Position B: External reference voltage is selected. This voltage may be supplies to D
LK17 ADDR Selection. This selects which pair of inputs are to be sampled.
Position A: VA2 and VB2 are sampled.
Position B: VA1 nd VB1 are sampled.
LK18 Range Selection. Set up the analog input voltage range for all inputs.
LK19
LK18 (RANGE0)
A (1)
A (1)
B (0)
B (0)
AD7366/AD7367
AD7366/AD7367
AD7366/AD7367
AD7366/AD7367
precision reference.
LK19 (RANGE1)
A (1)
B (0)
A (1)
B (0)
Rev. A | Page 6 of 20
Evaluation Board User Guide
(via Resistor R4).
(via Resistor R8).
(via Resistor R12).
(via Resistor R16).
A and/or D
CAP
Range Selected
Do not use.
±5 V
0 V to 10 V
±10 V
B pins.
CAP