EL2070C 데이터 시트보기 (PDF) - Elantec -> Intersil

부품명

상세내역

제조사

EL2070C

200MHz Current Feedback Amplifier

Elantec -> Intersil 

EL2070C

200MHz Current Feedback Amplifier

Printed Circuit Layout

As with any high frequency device, good PCB layout is

necessary for optimum performance. Ground plane con-

struction is a requirement, as is good power-supply and

Offset Adjust bypassing close to the package. The

inverting input is sensitive to stray capacitance, there-

fore connections at the inverting input should be

minimal, close to the package, and constructed with as

little coupling to the ground plane as possible.

Capacitance at the output node will reduce stability,

eventually resulting in peaking, and finally oscillation if

the capacitance is large enough. The design of the

EL2070C allows a larger capacitive load than compara-

ble products, yet there are occasions when a series

resistor before the capacitance may be needed. Please

refer to the graphs to determine the proper resistor value

needed.

Disable/Enable Operation

The EL2070C has a disable/enable control input at pin 8.

The device is enabled and operates normally when pin 8

is left open or tied to pin 7. When more than 350µA is

pulled from pin 8, the EL2070C is disabled. The output

becomes a high impedance, the inverting input is no

longer driven to the positive input voltage, and the sup-

ply current is reduced by 2/3. To make it easy to use this

feature, there is an internal resistor to limit the current to

a safe level (0.8mA) if pin 8 is grounded.

To draw current out of pin 8 an open-collector TTL out-

put, a 5V CMOS output, or an NPN transistor can be

used.

10

Share Link: