Datasheet

Power Supply Configuration
3-2
3.1 Power Supply Configuration
The SRC4192EVM requires a single +5 volt regulated dc power supply,
connected at the +5V terminal of J9. The GND terminal of J9 should be
connected to the power supply ground or common terminal. The supply
should not be connected to terminal block J9 while hot, as damage may
occur to the EVM. At no time should the power supply exceed the absolute
maximum rating.
3.2 Device Selection
The ~4193 element of switch SW7 is utilized to select the device under
test.
When ~4193 is set to LO, the EVM is configured for the SRC4193. The
SRC4193 is a software–controlled device, which employs an SPI port to
access internal control registers. The SPI port is accessed through the
buffered Host Port at connector J5. The Host Port supports connection to
an external microprocessor or DSP for host control.
When ~4193 is set to HI, the EVM is configured for the SRC4190 or
SRC4192. These units are stand–alone devices and do not require an ex-
ternal host for operation. The user configures the EVM by means of the
on–board switches and jumpers. The Analog Devices AD1895 and AD1896
are also supported in this mode, enabling head–to–head comparison test-
ing.