UG-1921
Rev. 0 | Page 3 of 18
EVALUATION BOARD HARDWARE
chip on board.
The ADMV8818-EVALZ also includes a negative voltage
generator and three LDO regulators to provide the necessary
supply voltages for the chip. The regulators can be entirely
powered by the 5 V USB supply voltage from the PC via the
To power the ADMV8818-EVALZ using the 5 V USB supply,
slide the S2 switch downward (as shown in Figure 2) to power
the on-board negative voltage generator and LDO regulators.
Alternatively, the ADMV8818-EVALZ can be powered externally
by sliding the S2 switch upward and then connecting power
supplies to the VPOS and VNEG Subminiature Version A (SMA)
ports or test points. The applicable voltage range for the positive
input VPOS is between 3.5 V and 5.5 V, and the applicable
voltage range for the negative input VNEG is between −5.5 V
and −2.7 V.
Figure 2 shows an example lab bench setup for the
ADMV8818-EVALZ. To observe the filter response from the
ADMV8818-EVALZ, connect the RF input (RFIN) and RF output
(RFOUT) ports to a network analyzer (or a similar instrument).
Typically, RFIN and RFOUT are connected to Port 1 and Port 2
on the network analyzer, as shown in Figure 2.
NETWORK ANALYZER
PORT 1
PORT 2
S2
25839-
002
Figure 2. Lab Bench Setup
