MAX4278 Evaluation Kit
_______________Detailed Description
Shutdown Control
Although the EV kit provides shutdown control circuitry
(J1) for other amplifiers, the MAX4278 and MAX4178
do not have a shutdown feature. Therefore, pin 8 is not
connected.
Layout Considerations
The MAX4278 EV kit layout is optimized for high-speed
signals. Careful attention was given to grounding,
power-supply bypassing, and signal path layout. Small,
J1
surface-mount ceramic capacitors are placed as close
to the MAX4278 supply pins as possible. The N.C. pins
(pins 1 and 5) are grounded to prevent unwanted noise
from coupling into the circuit. Refer to the Grounding,
Bypassing , and PC Board Layout section of the
MAX4178/MAX4278 data sheet for further details.
V+
C1
10 μ F
10V
SHDN*
ENABLE
DISABLE
2
3
8
C2
0.1 μ F
C3
1000pF
GND
IN
R1
75 ?
3
2
7
IN
U1
MAX4278
5
1
6
R2
75 ?
OUT
4
C5
0.1 μ F
C4
1000pF
RF
OPEN
GND
C6
10 μ F
10V
RG
0 ?
V-
* SHUTDOWN NOT APPLICABLE TO MAX4178/MAX4278
Figure 1. MAX4278 EV Kit Schematic
2
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