Datasheet

Evaluation Board User Guide UG-222
Rev. 0 | Page 3 of 20
EVALUATION BOARD HARDWARE
POWER SUPPLIES
There are several power supply options on the AD7190/AD7192
evaluation board.
Connected to USB Connector
The AD7190/AD7192 evaluation board is powered via the 5 V
supply from the USB connector, J51. This 5 V supply can be
used to power the AD7190/AD7192 directly. Link J1 should be
placed in Position 5 V USB.
The 5 V supply from the USB connector can be regulated to
3.3 V using the on-board ADP3303-3, a high precision, low
power, 3.3 V output voltage regulator. Therefore, using Link J1,
the 3.3 V can be used as the power supply to the AD7190/AD7192.
Link J1 should be placed in Position 3.3 V.
The AD7190/AD7192 can be powered using a 9 V battery, B1,
or using an external 9 V dc source connected at J31. The 9 V is
regulated down to 5 V using the on-board ADP3303-5, a high
precision, low power 5 V output regulator. Using Link J1, this
regulated 5 V can be used as the supply to the AD7190/AD7192.
To use this option, Link J1 should be placed in Position 5 V BAT.
An external power supply can be applied via J10. Link J1 should
be placed in Position EXT.
Standalone Operation
The AD7190/AD7192 evaluation board can be powered using a
9 V battery, B1, or using an external 9 V dc source connected at
J31. The 9 V is regulated down to 5 V using the on-board
ADP3303-5, a high precision, low power 5 V output regulator.
Using Link J1, this regulated 5 V can be used as the supply to
the AD7190/AD7192. To use this option, Link J1 should be
placed in Position 5 V BAT.
An external power supply can be applied via J10. Link J1 should
be placed in Position EXT.
SOCKETS
There are five sockets relevant to the operation of the AD7190/
AD7192 on this evaluation board. The functions of these sockets
are outlined in Table 1.
Table 1. Socket Functions
Socket Description
REF2+
Subminiature BNC (SMB) connector. This socket is used in conjunction with REFIN2− to apply an external reference to the
AD7190/AD7192. The voltage for the REFIN2(+) input of the AD7190/AD7192 is applied to this socket.
REF2−
Subminiature BNC (SMB) connector. This socket is used in conjunction with REFIN2+ to apply an external reference to the
AD7190/AD7192. The voltage for the REFIN2(−) input of the AD7190/AD7192 is applied to this socket.
AIN1 Subminiature BNC (SMB) connector. This socket is used to apply an analog input signal to AIN1.
AIN2 Subminiature BNC (SMB) connector. This socket is used to apply an analog input signal to AIN2.
MCLK Subminiature BNC (SMB) connector. An external clock source can be applied to the AD7190/AD7192 using this socket.