AD8170/AD8174
EVALUATION BOARD
Both evaluation boards ship with 75 Ω termination resistors on
their analog inputs and analog outputs. To use the evaluation
board in nonvideo applications where 50 Ω termination is more
popular, these resistors can be replaced with 50 Ω values. The
digital control pins are terminated with 50 Ω resistors to allow
easy connection to laboratory equipment.
Evaluation boards for the AD8170 and AD8174 are available
that have been carefully laid out and tested to demonstrate the
specified high speed performance of the devices. Figure 28 and
Figure 32 show the schematics of the AD8170 and AD8174
evaluation boards respectively. For ordering information, please
refer to the Ordering Guide.
The gain of the output current feedback op amp on both boards
has been set to +2. For other gains the two gain resistors can be
easily replaced. Refer to Table III for appropriate values at gains
other than +2.
Figure 29 shows the silkscreen of the component side of the
solder side of the AD8170 evaluation board. Figures 30 and 31
show the layout of the component side and solder side respec-
tively. The silkscreens and layout of the AD8174 evaluation
board are shown in Figures 33, 34, 35 and 36.
For connection to external instruments, side-launched SMA
type connectors are provided. Space is also provided on the
board for the installation of SMB of SMC type connectors.
R6
75Ω
V
OUT
SELECT
R1
R5
AD8170
549Ω
1
2
3
4
8
7
6
5
50Ω
C1
C3
GND
R4
549Ω
10µF
10µF
+
+
–VS
+1
–V
+V
S
+V
+1
S
S
C4
0.1µF
C2
0.1µF
IN0
IN1
R2
75Ω
R3
75Ω
Figure 28. AD8170 Evaluation Board
Figure 29. AD8170 Component Side Silkscreen
Figure 31. AD8170 Board Layout (Solder Side)
Figure 30. AD8170 Board Layout (Component Side)
REV. 0
–12–
ADI [ ADI ]
