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PDF EL2120CS Data sheet ( Hoja de datos )
| Número de pieza | EL2120CS | |
| Descripción | 100 MHz Current Feedback Amplifier | |
| Fabricantes | Elantec | |
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EL2120C
100 MHz Current Feedback Amplifier
Features
Excellent differential gain and
phase on g5V to g15V supplies
100 MHz b3 dB bandwidth from
gains of g1 to g10
700 V ms slew rate
0 1 dB flatness to 20 MHz
Output disable in 50 ns - remains
high impedance even when
driven with large slew rates
Single a5V supply operation
AC characteristics are lot and
temperature stable
Available in small SO-8 package
Applications
Video gain block
Residue amplifier
Multiplexer
Current to voltage converter
Coax cable driver with gain of 2
ADC driver
Ordering Information
Part No Temp Range Package Outline
EL2120CN 0 C to a75 C 8-Pin P-DIP MDP0031
EL2120CS 0 C to a75 C 8-Lead SO MDP0027
Connection Diagrams
P-DIP
General Description
The EL2120C is a wideband current feedback amplifier opti-
mized for video performance Its 0 01% differential gain and
0 03 degree differential phase performance when at g5V sup-
plies exceeds the performance of other amplifiers running on
g15V supplies Operating on g8 to g15V supplies reduces dis-
tortions to 0 01% and 0 01 degrees and below The EL2120C can
operate with supplies as low as g2 5V or a single a5V supply
Being a current feedback design bandwidth is a relatively con-
stant 100 MHz over the g1 to g10 gain range The EL2120C
has been optimized for flat gain over frequency and all charac-
teristics are maintained at positive unity gain Because the in-
put slew rate is similar to the 700 V ms output slew rate the
part makes an excellent high-speed buffer
The EL2120C has a superior output disable function Time to
enable or disable is 50 ns and does not change markedly with
temperature Furthermore in disable mode the output does not
draw excessive currents when driven with 1000 V ms slew rates
The output appears as a 3 pF load when disabled
Simplified Schematic
SO
2120 – 1
2120 – 21
Top View
2120 – 2
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
1991 Elantec Inc
1 page  
EL2120C
100 MHz Current Feedback Amplifier
Typical Performance Curves Contd
Gain Flatness vs RF
Gain Flatness vs CINb
b3 dB Bandwidth 0 1 dB Bandwidth
and Peaking vs Temperature
at VS g15V
b3 dB Bandwidth 0 1 dB Bandwidth
and Peaking vs Temperature
at VS g5V
b3 dB Bandwidth
0 1 dB Bandwidth and
Peaking vs Supply Voltage
Deviation From Linear
Phase vs Frequency
2120 – 7
5
5 Page 
EL2120C
100 MHz Current Feedback Amplifier
The EL2120C Macromodel
This macromodel has been developed to assist the user in simulating the EL2120C with surrounding
circuitry It was developed for the PSPICE simulator (copywritten by the Microsim corporation) and
may need to be rearranged for other simulators particularly the H operator It approximates frequency
response and small-signal transients as well although the effects of load capacitance does not show
This model is slightly more complicated than the models used for low-frequency op-amps but is much
more accurate for AC
The model does not simulate these characteristics accurately
noise
non-linearities
slew rate limitations
temperature effects
settling time
manufacturing variations
input or output resonances CMRR and PSRR
Revision A March 1992
Enhancements include PSRR CMRR and Slew Rate Limiting
Connections ainput
l binput
l l aVsupply
l l l bVsupply
l l l l output
lllll
subckt M2120 3 2 7 4 6
Input Stage
e1 10 0 3 0 1 0
vis 10 9 0V
h2 9 12 vxx 1 0
r1 2 11 25
l1 11 12 20nH
iinp 3 0 10mA
iinm 2 0 5mA
r12 3 0 2Meg
Slew Rate Limiting
h1 13 0 vis 600
r2 13 14 1K
d1 14 0 dclamp
s2 0 14 dclamp
High Frequency Pole
e2 30 0 14 0 0 00166666666
15 30 17 1mH
c5 17 0 0 5pF
r5 17 0 600
q1 4 18 19 qp
q2 7 18 20 qn
q3 7 19 21 qn
q4 4 20 22 qp
r7 21 6 4
r8 22 6 4
ios1 7 19 2 5mA
ios2 20 4 2 5mA
Supply
ips 7 4 10mA
Error Terms
ivos 0 23 5mA
vxx 23 0 0V
e4 24 0 6 0 1 0
e5 25 0 7 0 1 0
e6 26 0 4 0 1 0
r9 24 23 562
r10 25 23 10K
r11 26 23 10K
Transimpedance Stage
Models
g1 0 18 17 0 1 0
rol 18 0 140K
cdp 18 0 7 9pF
Output Stage
model qn npn (ise5eb15 bfe500 tfe0 1nS)
model qp pnp (ise5eb15 bfe500 tfe0 1nS)
model dclamp d(ise1eb30 ibve0 02 bve4 n e4)
ends
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet EL2120CS.PDF ] | |
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