EL2166C
December
1995
Rev
C
EL2166C
110 MHz Current Feedback Amplifier with Disable
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
Features
110 MHz 3 dB bandwidth
(A
V
e a
2)
115 MHz 3 dB bandwidth
(A
V
e a
1)
0 01% differential gain
R
L
e
500
X
0 01 differential phase
R
L
e
500
X
Low supply current 7 5 mA
Fast disable
k
75 ns
Low cost
1500 V ms slew rate
Applications
Video amplifiers
Cable drivers
RGB amplifiers
Test equipment amplifiers
Current to voltage converters
Broadcast equipment
High speed communications
Video multiplexing
Ordering Information
Part No
Temp Range
Package
Outline
EL2166CN
b
40 C to
a
85 C 8-Pin P-DIP MDP0031
EL2166CS
b
40 C to
a
85 C 8-Pin SOIC
MDP0027
General Description
The EL2166C is a current feedback operational amplifier with
b
3 dB bandwidth of 110 MHz at a gain of
a
2 Built using the
Elantec proprietary monolithic complementary bipolar process
this amplifer uses current mode feedback to achieve more band-
width at a given gain than a conventional voltage feedback op-
erational amplifier
The EL2166C is designed to drive a double terminated 75
X coax
cable to video levels Differential gain and phase are excellent
when driving both loads of 500
X (
k
0 01%
k
0 01 ) and double
terminated 75
X cables (0 025% 0 05
V
S
e
g
15V 0 04%
0 02
V
S
e
g
5V)
The EL2166C has a superior output disable function Time to
enable or disable is
k
75 ns The DISABLE pin is TTL CMOS
compatible In disable mode the amplifier can withstand over
1500 V
ms signals at their outputs The amplifier can operate on
any supply voltage from 10V (
g
5V) to 33V (
g
16 5V) yet con-
sume only 7 5 mA at any supply voltage The EL2166C is avail-
able in 8-pin P-DIP and 8-pin SO packages
Connection Diagram
EL2166C SO P-DIP
Packages
2166 1
Top View
Manufactured under U S Patent No 5 420 542 4 893 091
EL2166C
110 MHz Current Feedback Amplifier with Disable
Absolute Maximum Ratings
(T
A
e
25 C)
Voltage between V
S
a
and V
S
b
a
33V
Voltage between
a
IN and
b
IN
g
6V
Current into
a
IN or
b
IN
10 mA
Output Current
g
50 mA
Current into DISABLE Pin
g
5 mA
Voltage between DISABLE Pin and
GND Pin
g
7V
Voltage at IN
a
IN
b
V
OUT
DISABLE GND Pins
(V
Sb
)
b
0 5V to (V
Sa
)
a
0 5V
Internal Power Dissipation
See Curves
Operating Ambient Temperature Range
b
40 C to
a
85 C
Operating Junction Temperature
Plastic Packages
150 C
Storage Temperature Range
b
65 C to
a
150 C
Important Note
All parameters having Min Max specifications are guaranteed The Test Level column indicates the specific device testing actually
performed during production and Quality inspection Elantec performs most electrical tests using modern high-speed automatic test
equipment specifically the LTX77 Series system Unless otherwise noted all tests are pulsed tests therefore T
J
e
T
C
e
T
A
Test Level
Test Procedure
I
100% production tested and QA sample tested per QA test plan QCX0002
II
100% production tested at T
A
e
25 C and QA sample tested at T
A
e
25 C
T
MAX
and T
MIN
per QA test plan QCX0002
III
QA sample tested per QA test plan QCX0002
IV
Parameter is guaranteed (but not tested) by Design and Characterization Data
V
Parameter is typical value at T
A
e
25 C for information purposes only
Open Loop DC Electrical Characteristics
V
S
e
g
15V R
L
e
150
X T
A
e
25 C unless otherwise specified
Parameter
Description
Conditions
Temp
Limits
Test Level
Units
Min
Typ
Max
EL2166C
V
OS
Input Offset Voltage
V
S
e
g
5V
g
15V
25 C
2
10
I
mV
TC V
OS
Average Offset Voltage
Full
10
V
mV C
Drift (Note 1)
a
I
IN
a
Input Current
V
S
e
g
5V
g
15V
25 C
0 5
5
I
mA
b
I
IN
b
Input Current
V
S
e
g
5V
g
15V
25 C
5
20
I
mA
CMRR
Common Mode Rejection
V
S
e
g
5V
g
15V
25 C
55
62
II
dB
Ratio (Note 2)
b
ICMR
b
Input Current Common
V
S
e
g
5V
g
15V
25 C
0 1
2
I
mA V
Mode Rejection (Note 2)
PSRR
Power Supply Rejection
25 C
65
72
II
dB
Ratio (Note 3)
b
IPSR
b
Input Current Power
25 C
0 1
2
I
mA V
Supply Rejection (Note 3)
2
TD
is
25in
EL2166C
110 MHz Current Feedback Amplifier with Disable
Open Loop DC Electrical Characteristics
Contd
V
S
e
g
15V R
L
e
150
X T
A
e
25 C unless otherwise specified
Parameter
Description
Conditions
Temp
Limits
Test Level
Units
Min
Typ
Max
EL2166C
R
OL
Transimpedance
V
S
e
g
15V
25 C
500
2000
I
k
X
(Note 4)
R
L
e
400
X
V
S
e
g
5V
25 C
500
1200
I
k
X
R
L
e
150
X
a
R
IN
a
Input Resistance
25 C
2 0
5 0
I
M
X
a
C
IN
a
Input Capacitance
25 C
2 5
V
pF
CMIR
Common Mode Input Range
V
S
e
g
15V
25 C
g
12 6
g
13 2
I
V
V
S
e
g
5V
25 C
g
2 6
g
3 2
I
V
V
O
Output Voltage Swing
R
L
e
400
X
25 C
g
12
g
13 5
I
V
V
S
e
g
15V
R
L
e
150
X
25 C
g
11 4
V
V
V
S
e
g
15V
R
L
e
150
X
25 C
g
3 0
g
3 7
I
V
V
S
e
g
5V
I
SC
Output Short Circuit
V
S
e
g
5V
25 C
50
80
130
I
mA
Current (Note 5)
V
S
e
g
15V
I
S
Supply Current
V
S
e
g
15V
25 C
7 5
10 0
I
mA
V
S
e
g
5V
I
S
OFF
Supply Current Disabled Pin 8
e
0V
25 C
7 3
10 0
I
mA
I
OUT
OFF
Output Current Disabled Pin 8
e
0V
A
V
e a
1
25 C
2 0
50 0
I
mA
V
IH
DISABLE Pin Voltage for
25 C
2 0
I
V
Output Enabled (Note 9)
V
IL
DISABLE Pin Threshold for Output Disabled
25 C
0 8
I
V
I
DIS
ON
DISABLE Pin Input Current Pin 8
e a
5V
25 C
70
150
I
mA
I
DIS
OFF
DISABLE Pin Input Current Pin 8
e
0V
25 C
b
150
b
60
I
mA
3
TD
is
46in
EL2166C
110 MHz Current Feedback Amplifier with Disable
Closed Loop AC Electrical Characteristics
V
S
e
g
15V A
V
e a
2 R
F
e
560
X R
L
e
150
X T
A
e
25 C unless otherwise noted
Parameter
Description
Conditions
Limits
Test Level
Units
Min
Typ
Max
EL2166C
BW
b
3 dB Bandwidth
V
S
e
g
15V A
V
e a
2
110
V
MHz
(Note 8)
V
S
e
g
15V A
V
e a
1
115
V
MHz
V
S
e
g
5V A
V
e a
2
95
V
MHz
V
S
e
g
5V A
V
e a
1
100
V
MHz
SR
Slew Rate
R
L
e
400
X
1000
1500
IV
V
ms
(Notes 6 8)
t
r
t
f
Rise Time
V
OUT
e
g
500mV
3 2
V
ns
Fall Time (Note 8)
t
pd
Propagation Delay
4 3
V
ns
(Note 8)
OS
Overshoot (Note 8)
V
OUT
e
g
500 mV
7
V
%
t
s
0 1% Settling Time
V
OUT
e
g
10V
35
V
ns
(Note 8)
A
V
e
g
1 R
L
e
1K
dG
Differential Gain
R
L
e
150
X V
S
e
g
15V
0 025
V
%
(Notes 7 8)
R
L
e
150
X V
S
e
g
5V
0 05
V
%
R
L
e
500
X V
S
e
g
15V
0 01
V
%
R
L
e
500
X V
S
e
5V
0 01
V
%
dP
Differential Phase
R
L
e
150
X V
S
e
g
15V
0 04
V
deg ( )
(Notes 7 8)
R
L
e
150
X V
S
e
g
5V
0 02
V
deg ( )
R
L
e
500
X V
S
e
g
15V
0 01
V
deg ( )
R
L
e
500
X V
S
e
5V
0 01
V
deg ( )
t
DIS
Disable Enable Time
75
V
ns
(Note 10)
Note 1 Measured from T
MIN
to T
MAX
Note 2 V
CM
e
g
12 6V for V
S
e
g
15V and T
A
e
25 C
V
CM
e
g
2 6V for V
S
e
g
5V and T
A
e
25 C
Note 3 The supplies are moved from
g
5V to
g
15V
Note 4 V
OUT
e
g
7V for V
S
e
g
15V and V
OUT
e
g
2V for V
S
e
g
5V
Note 5 A heat sink is required to keep junction temperature below absolute maximum when an output is shorted
Note 6 Slew Rate is with V
OUT
from
a
10V to
b
10V and measured at the 25% and 75% points
Note 7 DC offset from
b
0 714V through
a
0 714V AC amplitude 286 mV
p-p
f
e
3 58 MHz
Note 8 All AC tests are performed on a ``warmed up'' part except for Slew Rate which is pulse tested
Note 9 The EL2166C will remain ENABLED if pin 8 is either left unconnected or V
IH
is applied to pin 8
Note 10 Disable Enable time is defined as the time from when the logic signal is applied to the DISABLE pin to when the output
voltage has gone 50% of the way from its initial to its final value
4
TD
is
44in
EL2166C
110 MHz Current Feedback Amplifier with Disable
Typical Performance Curves
Response (Gain)
Non-Inverting Frequency
Response (Phase)
Non-Inverting Frequency
for Various R
L
Frequency Response
Response (Gain)
Inverting Frequency
Response (Phase)
Inverting Frequency
Various R
F
and R
G
Frequency Response for
Voltage for A
V
e
b
1
3 dB Bandwidth vs Supply
for A
V
e
b
1
Peaking vs Supply Voltage
Temperature for A
V
e
b
1
3 dB Bandwidth vs
2166 2
5
EL2166C
110 MHz Current Feedback Amplifier with Disable
Typical Performance Curves
Contd
Voltage for A
V
e
a
1
3 dB Bandwidth vs Supply
for A
V
e
a
1
Peaking vs Supply Voltage
Temperature for A
V
e
a
1
3 dB Bandwidth vs
Voltage for A
V
e
a
2
3 dB Bandwidth vs Supply
for A
V
e
a
2
Peaking vs Supply Voltage
Temperature for A
V
e
a
2
3 dB Bandwidth vs
Voltage for A
V
e
a
10
3 dB Bandwidth vs Supply
for A
V
e
a
10
Peaking vs Supply Voltage
Temperature for A
V
e
a
10
3 dB Bandwidth vs
2166 3
6
EL2166C
110 MHz Current Feedback Amplifier with Disable
Typical Performance Curves
Contd
for Various C
L
Frequency Response
for Various C
INb
Frequency Response
vs Frequency
PSRR and CMRR
Distortion vs Frequency
2nd and 3rd Harmonic
vs Frequency
Transimpedance (R
OL
)
vs Frequency
Voltage and Current Noise
Impedance vs Frequency
Closed-Loop Output
vs Die Temperature
Transimpedance (R
OL
)
2166 4
7
EL2166C
110 MHz Current Feedback Amplifier with Disable
Typical Performance Curves
Contd
vs Die Temperature
Offset Voltage
vs Die Temperature
Supply Current
vs Supply Voltage
Supply Current
vs Die Temperature
a
Input Resistance
vs Die Temperature
Input Current
vs Input Voltage
a
Input Bias Current
vs Die Temperature
Output Voltage Swing
vs Die Temperature
Short Circuit Current
vs Die Temperature
PSRR
CMRR
2166 5
8
EL2166C
110 MHz Current Feedback Amplifier with Disable
Typical Performance Curves
Contd
R
L
e
150
vs DC Input Voltage
Differential Gain
R
L
e
150
vs DC Input Voltage
Differential Phase
Pulse Response
Small Signal
R
L
e
500
vs DC Input Voltage
Differential Gain
R
L
e
500
vs DC Input Voltage
Differential Phase
Pulse Response
Large Signal
vs Supply Voltage
Slew Rate
vs Temperature
Slew Rate
vs Settling Accuracy
Settling Time
2166 6
9
EL2166C
110 MHz Current Feedback Amplifier with Disable
Typical Performance Curves
Contd
Long Term Settling Error
vs Ambient Temperature
Maximum Power Dissipation
8-Lead Plastic DIP
vs Ambient Temperature
Maximum Power Dissipation
8-Lead Plastic SO
2166 7
ENABLE Response for
a Family of D C Inputs
2166 8
A
V
e a
2 R
L
e
150 V
S
e
g
15V
DISABLE Response for
a Family of D C Inputs
2166 9
A
V
e a
2 R
L
e
150 V
S
e
g
15V
Burn-In Circuit
EL2166C
2166 10
10
EL2166C
110 MHz Current Feedback Amplifier with Disable
Differential Gain and Phase Test Circuit
2166 11
Simplified Schematic
2166 12
11
EL2166C
110 MHz Current Feedback Amplifier with Disable
Applications Information
Product Description
The EL2166C is a current mode feedback amplifi-
er that offers wide bandwidth and good video
specifications at a moderately low supply cur-
rent It is built using Elantec's proprietary com-
plimentary bipolar process and is offered in in-
dustry standard pin-outs
Due to the current
feedback architecture the EL2166C closed-loop
3 dB bandwidth is dependent on the value of the
feedback resistor First the desired bandwidth is
selected by choosing the feedback resistor R
F
and then the gain is set by picking the gain resis-
tor R
G
The curves at the beginning of the Typi-
cal Performance Curves section show the effect of
varying both R
F
and R
G
The 3 dB bandwidth is
only slightly dependent on the power supply
voltage The bandwidth reduces from 110 MHz
to 95 MHz as supplies are varied from
g
15V to
g
5V To compensate for this smaller values of
feedback resistor can be used at lower supply
voltages
Power Supply Bypassing and Printed
Circuit Board Layout
As with any high frequency device good printed
circuit board layout is necessary for optimum
performance Ground plane construction is high-
ly recommended Lead lengths should be as short
as possible below
The power supply pins
must be well bypassed to reduce the risk of oscil-
lation A 1 0
mF tantalum capacitor in parallel
with a 0 01
mF ceramic capacitor is adequate for
each supply pin
For good AC performance parasitic capacitances
should be kept to a minimum especially at the
inverting input (see Capacitance at the Inverting
Input section) This implies keeping the ground
plane away from this pin Carbon resistors are
acceptable
while use of wire-wound resistors
should not be used because of their parasitic in-
ductance Similarly capacitors should be low in-
ductance for best performance Use of sockets
particularly for the SO package should be avoid-
ed Sockets add parasitic inductance and capaci-
tance which will result in peaking and overshoot
Capacitance at the Inverting Input
Due to the topology of the current feedback am-
plifier stray capacitance at the inverting input
will affect the AC and transient performance of
the
EL2166C
when
operating
in
the
non-
inverting configuration The characteristic curve
of gain vs frequency with variations of C
IN
b
emphasizes this effect The curve illustrates how
the bandwidth can be extended over 30 MHz
with some additional peaking with an additional
5 pF of capacitance at the V
IN
b
pin for the case
of A
V
e
a
2 Higher values of capacitance will
be required to obtain similar effects at higher
gains
In the inverting gain mode added capacitance at
the inverting input has little effect since this
point is at a virtual ground and stray capacitance
is therefore not ``seen'' by the amplifier
Feedback Resistor Values
The EL2166C has been designed and specified
with R
F
e
560
X for A
V
e
a
2 This value of
feedback resistor yields relatively flat frequency
response with
k
1 5 dB peaking out to 110 MHz
As is the case with all current feedback amplifi-
ers wider bandwidth at the expense of slight
peaking can be obtained by reducing the value of
the feedback resistor Inversely larger values of
feedback resistor will cause rolloff to occur at a
lower frequency By reducing R
F
to 430
X band-
width can be extended to 120 MHz with 4 5 dB of
peaking See the curves in the Typical Perform-
ance Curves section which show 3 dB bandwidth
and peaking vs frequency for various feedback
resistors and various supply voltages
Bandwidth vs Temperature
Whereas many amplifier's supply current and
consequently 3 dB bandwidth drop off at high
temperature the EL2166C was designed to have
little supply current variations with temperature
An immediate benefit from this is that the 3 dB
bandwidth does not drop off drastically with
temperature With V
S
e
g
15V and A
V
e
a
2
the bandwidth only varies from 115 MHz to
95 MHz over the entire die junction temperature
range of 0 C
k
T
k
150 C
12
EL2166C
110 MHz Current Feedback Amplifier with Disable
Applications Information
Contd
Supply Voltage Range
The EL2166C has been designed to operate with
supply voltages from
g
5V to
g
15V AC per-
formance including
b
3 dB bandwidth and dif-
ferential gain and phase shows little degradation
as the supplies are lowered to
g
5V For example
as supplies are lowered from
g
15V to
g
5V
b
3 dB bandwidth reduces only 15 MHz and dif-
ferential gain and phase remain less than 0 05%
0 02 respectively
If a single supply is desired values from
a
10V to
a
30V can be used as long as the input common
mode range is not exceeded When using a single
supply be sure to either 1) DC bias the inputs at
an appropriate common mode voltage and AC
couple the signal or 2) ensure the driving signal
is within the common mode range of the
EL2166C
Disable Function
The EL2166C has a superior disable function
that has been optimized for video performance
Time to disable enable is around 75 ns
During disable the output of the EL2166C can
withstand over 1500 V
ms slew rate signals at its
output and the output does not draw excessive
currents The feed-through can be modeled as a
1 5 pF capacitor from V
IN
a
to the output and
the output impedance can be modeled as 4 4 pF
in parallel with 180 k
X to ground when disabled
Consequently multiplexing with the EL2166C is
very easy Simply tie the outputs of multiple
EL2166Cs together and drive the
DISABLE
pins with standard TTL or CMOS signals The
disable signal applied to the
DISABLE pin is
referenced to the GND pin The GND pin can be
tied as low as the V
S
b
pin This allows the
EL2166C to be operated on a single supply For
example one could tie the V
S
b
and GND pins to
0V and V
S
a
to
a
10V and then use standard
TTL or CMOS to drive the DISABLE pin Re-
member to keep the inputs of the EL2166C with-
in their common mode range
Multiplexing with the EL2166C
An example of multiplexing with the EL2166C
and its response curve is shown below Always be
sure that no more than
g
5V is applied between
V
IN
a
and V
IN
b
which is compatible with stan-
dard video signals This usually becomes an issue
only when using the disable feature and amplify-
ing large voltages
Dual EL2166C Multiplexer
2166 15
In the multiplexer above suppose one amp is dis-
abled and the other has amplified a signal to
a
10V at V
OUT
The voltage at pin 2 of the dis-
Dual EL2166C Multiplexer Switching
4 V
PP
Uncorrelated Sinewaves to
2 V
PP
Uncorrelated Sinewaves
2166 16
13
EL2166C
110 MHz Current Feedback Amplifier with Disable
Applications Information
Contd
abled amplifier will now be
a
5V due to the resis-
tor divider action Therefore any applied voltage
at pin 3 of the disabled amplifier must remain
above 0V if the voltage between pins 2 and 3 of
the disabled amplifier is to remain less than 5V
Also keep in mind that each disabled amplifier
adds more capacitance to the bus as discussed
above See Disable Function and Driving Cables
and Capacitive Loads in this section and the Fre-
quency Response for Various C
L
curves in the
Typical Performance Curve section
Settling Characteristics
The EL2166C offers superb settling characteris-
tics to 0 1% typically in the 35 ns to 40 ns range
There are no aberrations created from the input
stage which often cause longer settling times in
other current feedback amplifiers The EL2166C
is not slew rate limited therefore any size step up
to
g
10V gives approximately the same settling
time
As can be seen from the Long Term Settling Er-
ror curve for A
V
e a
1 there is approximately a
0 02% residual which tails away to 0 01% in
about 20
ms This is a thermal settling error
caused by a power dissipation differential (before
and after the voltage step) For A
V
e b
1 due to
the inverting mode configuration this tail does
not appear since the input stage does not experi-
ence the large voltage change as in the non-in-
verting mode With A
V
e
b
1 0 01% settling
time is slightly greater than 100 ns
Power Dissipation
The EL2166C amplifier combines both high
speed and large output current drive capability at
a moderate supply current in very small pack-
ages It is possible to exceed the maximum junc-
tion temperature allowed under certain supply
voltage temperature and loading conditions To
ensure that the EL2166C remains within its abso-
lute maximum ratings the following discussion
will help to avoid exceeding the maximum junc-
tion temperature
The maximum power dissipation allowed in a
package is determined by its thermal resistance
and the amount of temperature rise according to
P
DMAX
e
T
JMAX
b
T
AMAX
i
JA
The maximum power dissipation actually pro-
duced by an IC is the total quiescent supply cur-
rent times the total power supply voltage plus
the power in the IC due to the load or
P
DMAX
e
2
V
S
I
S
a
(V
S
b
V
OUT
)
V
OUT
R
L
where I
S
is the supply current (To be more accu-
rate the quiescent supply current flowing in the
output driver transistor should be subtracted
from the first term because under loading and
due to the class AB nature of the output stage
the output driver current is now included in the
second term )
In general an amplifier's AC performance de-
grades at higher operating temperature and lower
supply current
Unlike some amplifiers
the
EL2166C maintains almost constant supply cur-
rent over temperature so that AC performance is
not degraded as much over the entire operating
temperature range Of course this increase in
performance doesn't come for free Since the cur-
rent has increased supply voltages must be limit-
ed so that maximum power ratings are not ex-
ceeded
The EL2166C consumes typically 7 5 mA and
maximum 10 0 mA The worst case power in an
IC occurs when the output voltage is at half sup-
ply if it can go that far or its maximum values if
it cannot reach half supply If we set the two
P
DMAX
equations equal to each other and solve
for V
S
we can get a family of curves for various
loads and output voltages according to
V
S
e
R
L
(T
JMAX
b
T
AMAX
)
i
JA
a
(V
OUT
)
2
(2
I
S
R
L
)
a
V
OUT
14
EL2166C
110 MHz Current Feedback Amplifier with Disable
Applications Information
Contd
The following curves show supply voltage (
g
V
S
)
vs R
LOAD
for various output voltage swings for
the 2 different packages
The curves assume
worst case conditions of T
A
e
a
85 C and I
S
e
10 mA
Various V
OUT
(SO Package)
Supply Voltage vs R
LOAD
for
2166 13
Various V
OUT
(PDIP Package)
Supply Voltage vs R
LOAD
for
2166 14
The curves do not include heat removal or forc-
ing air or the simple fact that the package will
probably be attached to a circuit board which
can also provide some form of heat removal
Larger temperature and voltage ranges are possi-
ble with heat removal and forcing air past the
part
Current Limit
The EL2166C has an internal current limit that
protects the circuit in the event of the output be-
ing shorted to ground This limit is set at 80 mA
nominally and reduces with junction tempera-
ture At a junction temperature of 150 C the cur-
rent limits at about 50 mA If the output is short-
ed to ground the power dissipation could be well
over 1W Heat removal is required in order for
the EL2166C to survive an indefinite short
Driving Cables and Capacitive Loads
When used as a cable driver double termination
is always recommended for reflection-free per-
formance For those applications the back termi-
nation series resistor will decouple the EL2166C
from the capacitive cable and allow extensive ca-
pacitive drive However other applications may
have high capacitive loads without termination
resistors
In these applications
an additional
small value (5
X 50X) resistor in series with the
output will eliminate most peaking The gain re-
sistor R
G
can be chosen to make up for the gain
loss created by this additional series resistor at
the output
15
EL2166C
110 MHz Current Feedback Amplifier with Disable
EL2166C Macromodel
Revision A May 1994
AC Characteristics used C
IN
b
(pin 2)
e
1 pF R
F
e
560
X
Connections
a
input
l
b
input
l
l
a
Vsupply
l
l
l
b
Vsupply
l
l
l
l
output
l
l
l
l
l
subckt EL2166C EL 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 11 130
l1 11 12 25nH
iinp 3 0 0 5
mA
iinm 2 0 5
mA
r12 3 0 2Meg
Slew Rate Limiting
h1 13 0 vis 600
r2 13 14 1K
d1 14 0 dclamp
d2 0 14 dclamp
High Frequency Pole
e2 30 0 14 0 0 00166666666
l3 30 17 0 8
mH
c5 17 0 1 25pF
r5 17 0 500
Transimpedance Stage
g1 0 18 17 0 1 0
ro1 18 0 2Meg
cdp 18 0 2 9pF
Output Stage
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 2mA
ios2 20 4 2mA
Supply Current
ips 7 4 2mA
Error Terms
ivos 0 23 2mA
vxx 23 0 0V
e4 24 0 3 0 1 35K
e5 25 0 7 0 1 0
e6 26 0 4 0 1 0
r9 24 23 562
r10 25 23 1K
r11 26 23 1K
Models
model qn npn (is
e
5e
b
15 bf
e
200 tf
e
0 1ns)
model qp pnp (is
e
5e
b
15 bf
e
200 tf
e
0 1ns)
model dclamp d (is
e
1e
b
30 ibv
e
0 266 bv
e
2 8 n
e
4)
ends
16
TAB
WIDE
TD
is
65in
TD
is
26in
EL2166C
110 MHz Current Feedback Amplifier with Disable
EL2166C Macromodel
Contd
2166 17
17
BLANK
18
BLANK
19
EL2166C
December
1995
Rev
C
EL2166C
110 MHz Current Feedback Amplifier with Disable
General Disclaimer
Specifications contained in this data sheet are in effect as of the publication date shown Elantec Inc reserves the right to make changes
in the circuitry or specifications contained herein at any time without notice Elantec Inc assumes no responsibility for the use of any
circuits described herein and makes no representations that they are free from patent infringement
Elantec Inc
1996 Tarob Court
Milpitas CA 95035
Telephone (408) 945-1323
(800) 333-6314
Fax (408) 945-9305
European Office 44-71-482-4596
WARNING
Life Support Policy
Elantec Inc products are not authorized for and should not be
used within Life Support Systems without the specific written
consent of Elantec Inc Life Support systems are equipment in-
tended to support or sustain life and whose failure to perform
when properly used in accordance with instructions provided can
be reasonably expected to result in significant personal injury or
death Users contemplating application of Elantec Inc products
in Life Support Systems are requested to contact Elantec Inc
factory headquarters to establish suitable terms
conditions for
these applications Elantec Inc 's warranty is limited to replace-
ment of defective components and does not cover injury to per-
sons or property or other consequential damages
Printed in U S A
20
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