|
|
PDF EL2082 Data sheet ( Hoja de datos )
| Número de pieza | EL2082 | |
| Descripción | Current-Mode Multiplier | |
| Fabricantes | Elantec | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de EL2082 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
|
No Preview Available !
EL2082C
Current-Mode Multiplier
Features
Flexible inputs and outputs all
ground referred
150 MHz large and small-signal
bandwidth
46 dB of calibrated gain control
range
70 dB isolation in disable mode
10 MHz
0 15% diff gain and 0 05 diff
phase performance at NTSC
using application circuit
Operates on g5V to g15V power
supplies
Outputs may be paralleled to
function as a multiplexer
Applications
Level adjust for video signals
Video faders and mixers
Signal routing multiplexers
Variable active filters
Video monitor contrast control
AGC
Receiver IF gain control
Modulation demodulation
General ‘‘cold’’ front-panel
control of AC signals
Ordering Information
Part No Temp Range Package Outline
EL2082CN 0 C to a75 C 8-Pin P-DIP MDP0031
EL2082CS 0 C to a75 C 8-Pin SO
MDP0027
General Description
The EL2082 is a general purpose variable gain control building
block built using an advanced proprietary complementary bi-
polar process It is a two-quandrant multiplier so that zero or
negative control voltages do not allow signal feedthrough and
very high attenuation is possible The EL2082 works in current
mode rather than voltage mode so that the input impedance is
low and the output impedance is high This allows very wide
bandwidth for both large and small signals
The IIN pin replicates the voltage present on the VIN pin there-
fore the VIN pin can be used to reject common-mode noise and
establish an input ground reference The gain control input is
calibrated to 1 mA mA signal gain for 1V of control voltage
The disable pin (E) is TTL-compatible and the output current
can comply with a wide range of output voltages
Because current signals rather than voltages are employed mul-
tiple inputs can be summed and many outputs wire-or’ed or
mixed
The EL2082 operates from a wide range of supplies and is avail-
able in standard 8-pin plastic DIP or 8-lead SO
Connection Diagram
8-Pin DIP SO
Top View
2082 – 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
1992 Elantec Inc
1 page  
Typical Performance Curves Contd
Differential Gain Error
vs DC Offset Current
EL2082C
Current-Mode Multiplier
Differential Phase Error vs
DC Offset Current
Gain Pin Transient Response
Gain Control Recovery From
Vg e b0 1V
2082 – 3
Gain Control Pin
Frequency Response
2082 – 4
IOUT vs IIN
2082 – 5
Normalized Gain Error
vs VGAIN Voltage
2082 – 6
5
5 Page 
EL2082C
Current-Mode Multiplier
Applications Information Contd
Using the VIN Pin
The VIN pin can be used instead of the IIN pin so
The VIN pin used
as signal input
JGm e IOUT e bVg
1
VIN 1v Rg a 95X
2082 – 17
This connection is useful when a high input impedance is required There are a few caveats when using
the VIN pin The first is that VIN has a 250 V ms slew rate limitation The second is that the inevitable
CSTRAY across Rg causes a gain zero and gain INCREASES above the 1 (2q CSTRAY Rg) frequency
and can peak as much as 20 dB with large CSTRAY A graph of gain vs frequency for several CSTRAYS
is included in the typical performance curves In general if wide bandwidth and frequency flatness is
desired the IIN pin should be used
The VIN pin does make an excellent ground reference pin for instance when low-frequency noise is to
be rejected The next schematic shows the EL2082 VIN pin rejecting possible 60 Hz hum induced on an
RF input cable
Using the VIN pin
as a ground reference
to reject hum and noise
2082 – 18
This example shows VIN rejecting low-frequency field-induced noise but not adding peaking since the
0 01 mF bypass capacitor shunts high-frequency signals to local ground
Reactive Couplings with the EL2082
The following sketch is an excerpt of a receiver IF amplifier showing methods of connecting the
EL2082 to reactive networks
Example Reactive
Couplings with EL2082’s
11
2082 – 19
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet EL2082.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| EL2082 | Current-Mode Multiplier | Elantec |
| EL2082C | Current-Mode Multiplier | Elantec |
| EL2082CN | Current-Mode Multiplier | Elantec |
| EL2082CS | Current-Mode Multiplier | 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 |