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PDF EL4451C Data sheet ( Hoja de datos )
| Número de pieza | EL4451C | |
| Descripción | Wideband Variable-Gain Amplifier/ Gain of 2 | |
| Fabricantes | Elantec Semiconductor | |
| Logotipo |  |
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EL4451C
Wideband Variable-Gain Amplifier Gain of 2
Features
Complete variable-gain amplifier
with output amplifier requires
no extra components
Excellent linearity of 0 2%
70 MHz signal bandwidth
Operates on g5V to g15V
supplies
All inputs are differential
400V ms slew rate
l70dB attenuation 4 MHz
Applications
Leveling of varying inputs
Variable filters
Fading
Text insertion into video
Ordering Information
Part No Temp Range Package Outline
EL4451CN b40 C to a85 C 14-Pin P-DIP MDP0031
EL4451CS b40 C to a85 C 14-Lead SO MDP0027
General Description
The EL4451C is a complete variable gain circuit It offers wide
bandwidth and excellent linearity while including a powerful
output voltage amplifier drawing modest supply current
The EL4451C operates on g5V to g15V supplies and has an
analog input range of g2V making it ideal for video signal
processing AC characteristics do not change appreciably over
the g5V to g15V supply range
The circuit has an operational temperature range of b40 C to
a85 C and is packaged in plastic 14-pin DIP and 14-lead SO
The EL4451C is fabricated with Elantec’s proprietary comple-
mentary bipolar process which provides excellent signal sym-
metry and is free from latch up
Connection Diagram
4451-1
Note All information contained in this data sheet has been carefully checked and is believed to be accurate as of the date of publication however this data sheet cannot be a ‘‘controlled document’’ Current revisions if any to these
specifications are maintained at the factory and are available upon your request We recommend checking the revision level before finalization of your design documentation
1994 Elantec Inc
1 page  
EL4451C
Wideband Variable-Gain Amplifier Gain of 2
Typical Performance Curves Contd
Common-Mode
Rejection Ratio
vs Frequency
Input Voltage Noise
vs Frequency
Nonlinearity vs
Input Signal
4451 – 13
Differential Gain Error
vs Input Offset Voltage
VS e g5V or g12V
4451 – 14
Differential Phase Error
vs Input Offset Voltage
VS e g5V
4451 – 15
Differential Phase Error
vs Input Offset Voltage
VS e g12V
4451 – 16
Differential Gain
and Phase Errors
vs Gain Setting
4451 – 17
Differential Gain
and Phase Errors
vs Load Resistance
4451 – 18
4451 – 19
5
4451 – 20
5 Page 
EL4451C
Wideband Variable-Gain Amplifier Gain of 2
Applications Information Contd
A voltage-controlled equalizer and cable driver
can be constructed so
Equalization and Line Driver Amplifier
The main signal path is via the REF pin This
ensures maximum signal linearity while the mul-
tiplier input is used to allow a variable amount of
frequency-shaped input from R1 R2 and C For
optimum linearity the multiplier input is attenu-
ated by R1 and R2 This may not be necessary
depending on input signal amplitude and R1
might be set to 0 R1and R2 should be set to pro-
vide sufficient peaking depending on cable high-
frequency losses at maximum gain RF and RG
are chosen to provide the desired circuit gain in-
cluding backmatch resistor loss
4451 – 35
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet EL4451C.PDF ] | |
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