Setup Conditions; Sockets - Analog Devices AD7780 User Manual

UG-078

SETUP CONDITIONS

Take care before applying power and signals to the evaluation
board to ensure that all link positions are set per the required
operating mode. Table 2 shows the position in which all the
links are initially set.
Table 2. Initial Links and Positions
Link No.
LK1, LK2
LK3, LK4
LK5
LK6 to LK11
LK12
LK13
LK14
Table 3. Socket Functions
Socket Description
AIN+ Subminiature BNC (SMB) connector. The analog input signal for the AIN(+) input of the AD7780 is applied to this socket.
AIN− Subminiature BNC (SMB) connector. The analog input signal for the AIN(−) input of the AD7780 is applied to this socket.
REFIN+ Subminiature BNC (SMB) connector. This socket is used in conjunction with REFIN− to apply an external reference to the AD7780.
The voltage for the REFIN(+) input of the AD7780 is applied to this socket.
REFIN− Subminiature BNC (SMB) connector. This socket is used in conjunction with REFIN+ to apply an external reference to the AD7780.
The voltage for the REFIN(−) input of the AD7780 is applied to this socket.
J4 6-pin terminal block. This is used to connect an external load cell to the AD7780 evaluation board.
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Position Function
In AIN(+) and AIN(−) are shorted to AV
In The reference voltage is set to 3.3 V (AV
B The 3.3 V supply is used as AV
In The AD7780 is interfaced to the on-board microcontroller.
In The bridge power-down switch is connected to AV
Out The bridge power-down switch is disconnected from Header J4.
In Terminal GND/PSW of Header J4 is connected to GND.

SOCKETS

There are five sockets relevant to the operation of the AD7780
on this evaluation board. The functions of these sockets are
outlined in Table 3.
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for the AD7780.
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Rev. 0 | Page 4 of 16
Evaluation Board User Guide
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