EL2120C Current Feedback Amplifier Excellent differential ga

The Datasheet Archive - 100 Million Datasheets from 7500 Manufacturers.

EL2120C Current Feedback Amplifier Excellent differential ga

Datasheet Thumbnail

Top Searches for this datasheet

EL2120C
EL2120C
Current Feedback Amplifier
Excellent differential gain phase supplies bandwidth from gains slew rate flatness Output disable remains high impedance even when driven with large slew rates Single supply operation characteristics temperature stable Available small SO-8 package
General Description
EL2120C wideband current feedback amplifier optimized video performance differential gain degree differential phase performance when supplies exceeds performance other amplifiers running supplies Operating supplies reduces distortions degrees below EL2120C operate with supplies single supply Being current feedback design bandwidth relatively constant over gain range EL2120C been optimized flat gain over frequency characteristics maintained positive unity gain Because input slew rate similar output slew rate part makes excellent high-speed buffer EL2120C superior output disable function Time enable disable does change markedly with temperature Furthermore disable mode output does draw excessive currents when driven with 1000 slew rates output appears load when disabled
Applications
Video gain block Residue amplifier Multiplexer Current voltage converter Coax cable driver with gain driver
Simplified Schematic
Ordering Information
Part Temp Range Package Outline EL2120CN EL2120CS 8-Pin P-DIP MDP0031 8-Lead MDP0027
Connection Diagrams
P-DIP
January 1996
2120
2120
2120
View
Note information contained this data sheet been carefully checked believed accurate date publication however this data sheet cannot ``controlled document'' Current revisions these specifications maintained factory available upon your request recommend checking revision level before finalization your design documentation
1991 Elantec
EL2120C
Current Feedback Amplifier
Absolute Maximum Ratings
Voltage between Voltage VOUT Voltage between Voltage Disable Current into Disable (Vb)
Output Current Internal Power Dissipation Operating Ambient Temperature Range Operating Junction Temperature P-DIP Storage Temperature Range
Curves
Important Note parameters having specifications guaranteed Test Level column indicates specific device testing actually performed during production Quality inspection Elantec performs most electrical tests using modern high-speed automatic test equipment specifically LTX77 Series system Unless otherwise noted tests pulsed tests therefore Test Level Test Procedure 100% production tested sample tested test plan QCX0002 100% production tested sample tested TMAX TMIN test plan QCX0002 sample tested test plan QCX0002 Parameter guaranteed (but tested) Design Characterization Data Parameter typical value information purposes only
Open Loop Electrical Characteristics
150X unless otherwise specified Parameter DVOS CMRR
ICMR
Description Input Offset Voltage Input Offset Drift
Input Bias Current Input Bias Current
Temp Full Full Full Full Full Full Full Full Full Full Full
Test Level
Units
Common-Mode Rejection (Note
Input Current Common-Mode Rejection (Note
PSRR
IPSR IPSR
Power Supply Rejection (Note
Input Current Power Supply Rejection (Note Input Current Power Supply Rejection (Note
AVOL
Transimpedance Voltage Gain
Input Impedance
EL2120C
Current Feedback Amplifier
Open Loop Electrical Characteristics
150X unless otherwise specified Parameter VDIS VDIS IDIS IDIS Description
Range
Contd
Test Level
Temp Full Full Full Full Full Full Full Full
Units
Output Voltage Swing Output Short-Circuit Current Output Current Disabled Disable Voltage Output Enabled Disable Voltage Output Disabled Disable Current Output Enabled Disable Current Output Disabled Supply Current 15V)
Note input moved from Note supplies moved from
Closed Loop Electrical Characteristics
270X) 150X CINb Parameter Description Slew Rate VOUT from Measured Settling Time Swing with 270X 400X Bandwidth
Test Level
Units
Bandwidth
Peaking
EL2120C
Current Feedback Amplifier
Closed Loop Electrical Characteristics
Parameter Description Differential Gain Offset from through Amplitude mVp-p Differential Phase Offset from through Amplitude mVp-p
Contd
Test Level
270X) 150X CINb Units
Typical Performance Curves
Test Circuit
2120
Frequency Response
Frequency Response Gain
Frequency Response Load
2120
2120
2120
EL2120C
Current Feedback Amplifier
Typical Performance Curves
Contd
Gain Flatness
Gain Flatness
Bandwidth Bandwidth Peaking Temperature
Bandwidth Bandwidth Peaking Temperature
Bandwidth Bandwidth Peaking Supply Voltage
Deviation From Linear Phase Frequency
2120
EL2120C
Current Feedback Amplifier
Typical Performance Curves
Differential Gain Input Offset
Contd
Differential Phase Input Offset
Differential Gain Input Offset
Differential Phase Input Offset
Differential Gain Phase Supply Voltage (VIN from
Input Noise Voltage Current
2120
EL2120C
Current Feedback Amplifier
Typical Performance Curves
Undistorted Output Swing Frequency
Contd
Slew Rate Temperature
2120
Small-Signal Transient Response
Large-Signal Transient Response
270X 150X
2120
270X 150X
Long Term Settling Error
2120
Settling Time Swing
2120
EL2120C
Current Feedback Amplifier
Typical Performance Curves
Enable Response Family Inputs
Contd
Disable Response Family Inputs
150X
2120
150X
2120
Supply Current Supply Voltage
8-Pin Plastic Maximum Power Dissipation Ambient Temperature
8-Lead Maximum Power Dissipation Ambient Temperature
2120
EL2120C
Current Feedback Amplifier
Applications Information
EL2120C represents third generation current-feedback amplifier design designed provide good high-frequency performance over wide supply voltage load impedance gain temperature manufacturing variations well-behaved amplifier spite bandwidth precautions should taken obtain maximum performance power supply pins must well bypassed ceramic capacitors adequate lead length should kept below ground plane recommended Bypassing with tantalum capacitors improve settling characteristics smaller capacitors parallel will needed lead length sockets generally deteriorates amplifier's frequency response exaggerating peaking increasing ringing response transients Short sockets cause little degradation Load capacitance also increases ringing peaking Capacitance greater than should isolated with series resistor Capacitance terminal similar effect should kept below Often inductance leads load capacitance will self-resonant frequencies from cause oscillations resonant load de-Q'ed with small series parallel resistor ``snubber'' sometimes used reduce resonances This resistor capacitor series connected from output ground Values typical Increasing feedback resistor also improve frequency flatness oscillate realm presented with resonant inductive source impedance series resistor right will suppress such oscillations without affecting frequency response
bandwidth inversely proportional
greatest frequency response flatness instance) occurs with 300X 330X Even moderate peaking caused lower values will cause gain peak window higher values will cause overcompensated response where gain falls below level Parasitic capacitances will generally degrade frequency flatness EL2120C should output continuous current above stated ABSOLUTE MAXIMUM RATINGS table output current limit temperature reduces temperature This large current needed slew load capacitance drive impedance loads with distortion cannot supported continuously Furthermore package dissipation capabilities cannot under short-circuit conditions Current limit should occur longer than seconds output disable function EL2120C optimized video performance While disable mode feedthrough circuit modeled capacitor from output more than placed between disable mode this compatible with common video signal levels disabled state output withstand about 1000 slew rate signals impressed without output transistors turning Disable logic level referred With supplies CMOS driver with pull-up resistor will suffice supplies require drive span nominally Open-collector with tapped pull-up resistor provide these spans impedance divider should less optimum enable disable speed EL2120C enables less When only small switching glitch occurs output When some other value output overshoots about when settling toward enabled value
value feedback resistor EL2120C will tolerate values 180X maximum bandwidth about peaking will increase tolerance stray capacitance will reduce gains greater than bandwidth begins reduce smaller used maximize frequency response
EL2120C
Current Feedback Amplifier
Applications Information
Contd When EL2120C disables turns very rapidly inputs less output sags more slowly inputs larger than this inputs large output current absorbed another EL2120C simultaneously enabled Under these conditions switching will properly completed less greater thermal resistance SO-8 package requires that EL2120C operated from supplies less maintain maximum temperature over commercial temperature range P-DIP package allows full supply operation
Typical Applications Circuit
Dual EL2120C Multiplexer
High Quality Two-Input Multiplexer
Channel-to-Channel Isolation Dual EL2120C Multiplexer
2120
2120
Dual EL2120C Multiplexer Switching Channels Uncorrelated Sinewave Switched Family Levels
Dual EL2120C Multiplexer Switching Channels Family Levels Switched Uncorrelated Sinewave
2120
2120
EL2120C
Current Feedback Amplifier
EL2120C Macromodel
This macromodel been developed assist user simulating EL2120C with surrounding circuitry developed PSPICE simulator (copywritten Microsim corporation) need rearranged other simulators particularly operator approximates frequency response small-signal transients well although effects load capacitance does show This model slightly more complicated than models used low-frequency op-amps much more accurate model does simulate these characteristics accurately noise non-linearities slew rate limitations temperature effects settling time manufacturing variations input output resonances CMRR PSRR
Revision March 1992 Enhancements include PSRR CMRR Slew Rate Limiting input Connections input Vsupply Vsupply output
subckt M2120 Input Stage 20nH iinp 10mA iinm 2Meg Slew Rate Limiting
ios1 ios2 Supply 10mA
dclamp dclamp High Frequency Pole 00166666666 Transimpedance Stage 140K Output Stage
Error Terms ivos Models model 5eb15 1nS) model 5eb15 1nS) model dclamp d(is 1eb30 ends
WIDE
EL2120C
EL2120C
Current Feedback Amplifier
EL2120C Macromodel
Contd
2120
EL2120 Macromodel
General Disclaimer
Specifications contained this data sheet effect publication date shown Elantec reserves right make changes circuitry specifications contained herein time without notice Elantec assumes responsibility circuits described herein makes representations that they free from patent infringement
WARNING
Life Support Policy
January 1996
Elantec 1996 Tarob Court Milpitas 95035 Telephone (408) 945-1323 (800) 333-6314 (408) 945-9305 European Office 44-71-482-4596
Elantec products authorized should used within Life Support Systems without specific written consent Elantec Life Support systems equipment intended support sustain life whose failure perform when properly used accordance with instructions provided reasonably expected result significant personal injury death Users contemplating application Elantec products Life Support Systems requested contact Elantec factory headquarters establish suitable terms conditions these applications Elantec warranty limited replacement defective components does cover injury persons property other consequential damages
Printed

EL2120C Current Feedback Amplifier Excellent differential ga

Top Searches for this datasheet

Other recent searches