EL2160CS-T13 View Datasheet(PDF) - Elantec -> Intersil

Part Name

Description

Manufacturer

EL2160CS-T13

180MHz Current Feedback Amplifier

Elantec -> Intersil 

EL2160C

180MHz Current Feedback Amplifier

The EL2160C consumes typically 8.5mA and maximum

11.0mA. The worst case power in an IC occurs when the

output voltage is at half supply, if it can go that far, or its

maximum values if it cannot reach half supply. If we set

the two PDMAX equations equal to each other, and solve

for VS, we can get a family of curves for various loads

and output voltages according to:

VS

=

-R----L----×-----(--T----M-----A----X--------T----A----M-----A----X----)

θJA

+

(VOUT)

÷

[(2

× IS × RL ) + VOUT]

The following curves show supply voltage (±VS) vs

RLOAD for various output voltage swings for the 2 dif-

ferent packages. The curves assume worst case

conditions of TA = +85°C and IS = 11mA.

Supply Voltage vs RLOAD for Various VOUT

(8-Pin SO Package)

Supply Voltage vs RLOAD for

Various VOUT (PDIP Package)

The curves do not include heat removal or forcing air, or

the simple fact that the package will probably be

attached to a circuit board, which can also provide some

form of heat removal. Larger temperature and voltage

ranges are possible with heat removal and forcing air

past the part.

Current Limit

The EL2160C has an internal current limit that protects

the circuit in the event of the output being shorted to

ground. This limit is set at 100mA nominally and

reduces with junction temperature. At a junction temper-

ature of 150°C, the current limits at about 65mA. If the

output is shorted to ground, the power dissipation could

be well over 1W. Heat removal is required in order for

the EL2160C to survive an indefinite short.

Driving Cables and Capacitive Loads

When used as a cable driver, double termination is

always recommended for reflection-free performance.

For those applications, the back termination series resis-

tor will decouple the EL2160C from the capacitive cable

and allow extensive capacitive drive. However, other

applications may have high capacitive loads without ter-

mination resistors. In these applications, an additional

small value (5Ω–50Ω) resistor in series with the output

will eliminate most peaking. The gain resistor, RG, can

be chosen to make up for the gain loss created by this

additional series resistor at the output.

13

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