EL2072C
730 MHz Closed Loop Buffer
Burn-In Circuit
2072–4
Increasing capacitance on the output of the
EL2072 will add phase shift, decreasing phase
margin and increasing frequency-response peak-
ing. A small series resistor before the capacitance
decouples this effect, and should be used for large
capacitance values. Please refer to the graphs for
the appropriate resistor value to be used.
Printed Circuit Layout
As with any high-frequency device, good PCB
layout is necessary for optimum performance.
This is especially important for the EL2072,
which has a typical bandwidth of 730 MHz.
Ground plane construction is a requirement, as is
good power-supply bypassing close to the pack-
age. A closely-placed 0.01 mF ceramic capacitor
between each supply pin and the ground plane is
usually sufficient decoupling.
Pins 2, 3, 6, and 7 should be connected to the
ground-plane to minimize capacitive feed-
through, and all input and output traces should
be laid out as transmission lines and terminated
as close to the EL2072 package as possible.
7
ELANTEC [ ELANTEC SEMICONDUCTOR ]
