|
|
PDF EL2020CM Data sheet ( Hoja de datos )
| Número de pieza | EL2020CM | |
| Descripción | 50 MHz Current Feedback Amplifier | |
| Fabricantes | Elantec | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de EL2020CM (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
|
No Preview Available !
EL2020C
50 MHz Current Feedback Amplifier
Features
Slew rate 500 V ms
g33 mA output current
Drives g2 4V into 75X
Differential phase k0 1
Differential gain k0 1%
V supply g5V to g18V
Output short circuit protected
Uses current mode feedback
1% settling time of 50 ns for 10V
step
Low cost
9 mA supply current
8-pin mini-dip
Applications
Video gain block
Residue amplifier
Radar systems
Current to voltage converter
Coax cable driver with
gain of 2
Ordering Information
Part No Temp Range Pkg Outline
EL2020CN b40 C to a85 C P-DIP MDP0031
EL2020CM b40 C to a85 C 20-Lead MDP0027
SOL
General Description
The EL2020 is a fast settling wide bandwidth amplifier opti-
mized for gains between b10 and a10 Built using the Elantec
monolithic Complementary Bipolar process this amplifier uses
current mode feedback to achieve more bandwidth at a given
gain then a conventional voltage feedback operational amplifi-
er
The EL2020 will drive two double terminated 75X coax cables
to video levels with low distortion Since it is a closed loop de-
vice the EL2020 provides better gain accuracy and lower distor-
tion than an open loop buffer The device includes output short
circuit protection and input offset adjust capability
The bandwidth and slew rate of the EL2020 are relatively inde-
pendent of the closed loop gain taken The 50 MHz bandwidth
at unity gain only reduces to 30 MHz at a gain of 10 The
EL2020 may be used in most applications where a conventional
op amp is used with a big improvement in speed power prod-
uct
Elantec products and facilities comply with Elantec document
QRA-1 Processing-Monolithic Products
Connection Diagrams
SOL
DIP
2020 – 2
Manufactured under U S Patent No 4 893 091
2020 – 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
1989 Elantec Inc
1 page  
EL2020C
50 MHz Current Feedback Amplifier
Typical Performance Curves Non-Inverting Gain of One
AVCL e a1
Gain vs Frequency
Phase Shift vs
Frequency
Settling Time vs
Output Swing
b3 dB Bandwidth vs
Supply Voltage
Rise Time and
Prop Delay vs
Temperature
Slew Rate vs
Supply Voltage
Slew Rate vs
Temperature
2020 – 4
5
5 Page 
EL2020C
50 MHz Current Feedback Amplifier
Application Information Contd
Summing Amplifier
EL2020 Typical Inverting
Amplifier Characteristics
2020 – 12
10V
AV RF R1 R2 Bandwidth Settling Time
1% 0 1%
b1
b2
b5
b10
750X
750X
680X
680X
750X
375X
130X
68X
40 MHz
40 MHz
40 MHz
30 MHz
50 ns
55 ns
55 ns
70 ns
130 ns
160 ns
160 ns
170 ns
Input Range
The non-inverting input to the EL2020 looks like
a high resistance in parallel with a few picofarads
in addition to a DC bias current The input char-
acteristics change very little with output loading
even when the amplifier is in current limit
The input charactersitics also change when the
input voltage exceeds either supply by 0 5V This
happens because the input transistor’s base-col-
lector junctions forward bias If the input exceeds
the supply by LESS than 0 5V and then returns
to the normal input range the output will recov-
er in less than 10 ns However if the input ex-
ceeds the supply by MORE than 0 5V the recov-
ery time can be 100’s of nanoseconds For this
reason it is recommended that Schottky diode
clamps from input to supply be used if a fast re-
covery from large input overloads is required
Source Impedance
The EL2020 is fairly tolerant of variations in
source impedances Capacitive sources cause no
problems at all resistive sources up to 100 kX
present no problems as long as care is used in
board layout to minimize output to input cou-
pling Inductive sources may cause oscillations a
1 kX resistor in series with the input lead will
usually eliminate problems without sacrificing
too much speed
Current Limit
The EL2020 has internal current limits that pro-
tect the output transistors The current limit
goes down with junction temperature rise At a
junction temperature of a175 C the current lim-
its are at about 50 mA If the EL2020 output is
shorted to ground when operating on g15V sup-
plies the power dissipation could be as great as
1 1W A heat sink is required in order for the
EL2020 to survive an indefinite short Recovery
time to come out of current limit is about 50 ns
Using the 2020 with Output Buffers
When more output current is required a wide-
band buffer amplifier can be included in the feed-
back loop of the EL2020 With the EL2003 the
subsystem overshoots about 10% due to the
phase lag of the EL2003 With the EL2004 in the
loop the overshoot is less than 2% For even
more output current several buffers can be paral-
leled
EL2020 Buffered with an EL2004
2020 – 13
Capacitive Loads
The EL2020 is like most high speed feedback am-
plifiers in that it does not like capacitive loads
between 50 pF and 1000 pF The output resist-
ance works with the capacitive load to form a
second non-dominate pole in the loop This re-
sults in excessive peaking and overshoot and can
lead to oscillations Standard resistive isolation
techniques used with other op amps work well to
isolate capacitive loads from the EL2020
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet EL2020CM.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| EL2020C | 50 MHz Current Feedback Amplifier | Elantec |
| EL2020C | 50 Mhz Current Feedback Amplifier | Elantec |
| EL2020CM | 50 MHz Current Feedback Amplifier | Elantec |
| EL2020CN | 50 MHz Current Feedback Amplifier | Elantec |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |