EL4093 데이터 시트보기 (PDF) - Intersil
부품명
상세내역
제조사
EL4093 Datasheet PDF : 12 Pages
| |||
EL4093
FIGURE 8. LOWPASS FILTER DELAYS INPUT TO SAMPLE AND HOLD
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.
where:
VS = Supply Voltage
ISMAX = Maximum Supply Current of Amplifier
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 75Ω. To see
how much the junction temperature is raised in this worst
case, we refer to the equations below:
TJMAX = TMAX + (θJA • PDMAX)
where:
TMAX = Maximum Ambient Temperature
θJA = Thermal Resistance of the Package
PDMAX = Maximum Power Dissipation of the CFA and S/H
amplifier in the Package
VOUTMAX = Maximum Output Voltage of Application
RL = Load Resistance
For the EL4093, the maximum supply current is 11.5mA on
VS = ±5V. Assume that in the worst case, the CFA output
swings ±2V into 75Ω. 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,
PDMAX for the EL4093 is 223mW, and using the thermal
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.
PDMAX for either the CFA or the S/H amplifier can be
calculated as follows:
PDMAX = (2•VS•ISMAX) + (VS - VOUTMAX) •
(VOUTMAX/RL)
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets 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
12
Share Link: 