FN7159 Rev 0.00

Page 12 of 12

January 1996

EL4093

Intersil products are manufactured, assembled and tested utilizing ISO9001 quality systems as noted

in the quality certifications found at www.intersil.com/en/support/qualandreliability.html

Intersil products are sold by description only. Intersil may modify the circuit design and/or specifications of products at any time without notice, provided that such

modification does not, in Intersil's sole judgment, affect the form, fit or function of the product. Accordingly, the reader is cautioned to verify that datasheets are

current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its

subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Intersil or its subsidiaries.

For information regarding Intersil Corporation and its products, see www.intersil.com

For additional products, see www.intersil.com/en/products.html

© Copyright Intersil Americas LLC 2003. All Rights Reserved.

All trademarks and registered trademarks are the property of their respective owners.

If the video does not contain any AC components during the

autozero level (e.g. RGB video), then the above networks

are not needed and the CFA output can be connected

directly to the S/H input.

Power Dissipation

The EL4093 current feedback amplifier has an absolute

maximum of ±30mA output current drive. This is slightly

more than the current required to drive ±2V into 75

. To see

how much the junction temperature is raised in this worst

case, we refer to the equations below:

where:

S/H amplifier in the Package

calculated as follows:

where:

For the EL4093, the maximum supply current is 11.5mA on

swings ±2V into 75

. Since the S/H has a current output, we

assume that it is at maximum current swing (±5.5mA) but at

a mid-rail output voltage (0V). With the above assumptions,

resistance of a narrow SO package (120°C/W), this yields a

temperature increase of 27°C. Since the maximum ambient

temperature is 85°C, the resulting junction temperature of

112°C is still below the maximum.

Please note that this in addition to metal migration problems.

FIGURE 8. LOWPASS FILTER DELAYS INPUT TO SAMPLE AND HOLD