AD8170/AD8174

–12–

REV. 0

EVALUATION BOARD

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.

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.

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.

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.

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.

AD8170

+1

+1

–VS

8

7

6

5

1

2

3

4

GND

+

R6

75

Ω

R5

549

Ω

R4

549

Ω

+

C3

10µF

C4

0.1µF

C1

10µF

C2

0.1µF

R2

75

Ω

R3

75

Ω

R1

50

Ω

SELECT

IN0

IN1

Figure 28. AD8170 Evaluation Board

Figure 29. AD8170 Component Side Silkscreen

Figure 30. AD8170 Board Layout (Component Side)

Figure 31. AD8170 Board Layout (Solder Side)