EL2009C
December
1995
Rev
C
EL2009C
90 MHz 1 Amp Buffer Amplifier
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
Features
High slew rate
3000 V
ms
Wide bandwidth
125 MHz
R
L
e
50
X
90 MHz
R
L
e
10
X
Output current
1A continuous
Output impedance
1
X
Short circuit protected
Power package with isolated
metal tab
Applications
Video distribution amplifier
Fast op amp booster
Flash converter driver
Motor driver
Pulse transformer driver
A T E pin driver
Ordering Information
Part No
Temp Range Package Outline
EL2009CT 0 C to a75 C
TO-220
MDP0028
Connection Diagram
5-Pin TO-220
2009 1
Top View
General Description
The EL2009 is a patented high speed bipolar monolithic buffer
amplifier designed to provide currents over 1 amp at high fre-
quencies while drawing 40 mA of quiescent supply current The
EL2009's 3000 V
ms slew rate and 90 MHz bandwidth driving a
10
X load insures stability in fast op amp feedback loops Elan-
tec has applied for patents on unique circuitry within the
EL2009
Used as an open loop buffer the EL2009's low output imped-
ance (1
X) gives a gain of 0 99 when driving a 100X load and 0 9
driving a 10
X load
The EL2009 has an output short circuit current limit which will
protect the device under both a DC fault condition and AC op-
eration with reactive loads
The EL2009 is constructed using Elantec's proprietary Comple-
mentary Bipolar process that produces PNP and NPN transis-
tors with essentially identical AC and DC characteristics In the
EL2009 the Complementary Bipolar process also insulates the
package's metal heat sink tab from all supply voltages There-
fore the tab may be mounted to an external heat sink or the
chassis without an insulator
The EL2009CT is specified for operation over the 0 C to
a
75 C
temperature range and is provided in a 5-lead TO-220 plastic
power package
Simplified Schematic
2009 2
Manufactured under U S Patent No 4 833 424 and 4 827 223 and U K Patent No
2217134
EL2009C
90 MHz 1 Amp Buffer Amplifier
Absolute Maximum Ratings
(T
A
e
25 C)
V
S
Supply Voltage (V
a b
V
b
)
g
18V or 36V
V
IN
Input Voltage (Note 1)
g
15V or V
S
I
IN
Input Current (Note 1)
g
50 mA
P
D
Power Dissipation (Note 2)
See Curves
T
A
Operating Temperature Range
0 C to
a
75 C
T
J
Operating Junction Temp
175 C
T
ST
Storage Temp Range
b
65 C to
a
150 C
T
LD
Lead Solder Temp
k
10 seconds
300 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
Electrical Characteristics
V
S
e
g
15V R
S
e
50
X unless otherwise specified
Parameter
Description
Test Conditions
Limits
Level
Test
Units
V
IN
Load
Temp
Min
Typ
Max
V
OS
Output Offset Voltage
0
%
25 C
b
60
60
I
mV
T
MIN
T
MAX
b
80
80
IV
mV
I
IN
Input Current
0
%
25 C
b
125
b
5
125
I
mA
T
MIN
T
MAX
b
200
200
IV
mA
R
IN
Input Impedance
g
12V
100
X
25 C
250
900
I
k
X
A
V1
Voltage Gain
g
10V
%
25 C
0 985
0 999
I
V V
A
V2
Voltage Gain
g
10V
10
X
25 C
0 88
0 90
I
V V
A
V3
Voltage Gain
g
3V
10
X
25 C
0 87
0 89
I
V V
V
S
e
g
5V
V
O1
Output Voltage Swing
g
14V
100
X
25 C
g
13
I
V
V
O2
Output Voltage Swing
g
12V
10
X
25 C
g
10 5
g
11
I
V
R
O1
Output Impedance
g
10V
g
10 mA
25 C
1 5
I
X
R
O2
Output Impedance
g
10V
g
1A
25 C
0 9
1 0
I
X
I
O
Output Current
g
12V
(Note 3)
25 C
1 4
1 8
I
A
T
MIN
T
MAX
1
IV
A
I
S
Supply Current
0
%
25 C
30
45
65
I
mA
PSRR
Supply Rejection
0
%
25 C
60
I
dB
(Note 4)
2
TD
is
36in
EL2009C
90 MHz 1 Amp Buffer Amplifier
Electrical Characteristics
V
S
e
g
15V R
S
e
50
X unless otherwise specified
Contd
Parameter
Description
Test Conditions
Limits
Level
Test
Units
V
IN
Load
Temp
Min
Typ
Max
V
S
a
V
S
b
Supply Sensitivity
%
25 C
2
I
mV V
(Note 5)
SR
1
Slew Rate
g
10V
50
X
25 C
3000
V
V
ms
(Note 6)
10
X
2500
SR
2
Slew Rate
g
5V
10
X
25 C
1250
V
V
ms
(Note 7)
t
r
t
f
Rise Fall Time
100 mV
10
X
25 C
7
V
ns
BW
b
3 dB Bandwidth
100 mV
10
X
25 C
90
V
MHz
C
IN
Input Capacitance
25 C
25
V
pF
THD
Total Harmonic Distortion
25 C
1
I
%
Note 1 If the input exceeds the ratings shown (or the supplies) or if the input voltage exceeds
g
7 5V then the input current must be
limited to
g
50 mA
Note 2 The maximum power dissipation depends on package type ambient temperature and heat sinking See the characteristic
curves for more details
Note 3 Force the input to
a
12V and the output to
a
10V and measure the output current Repeat with
b
12V input and
b
10V on
the output
Note 4 V
S
e
g
4 5V then V
S
is changed to
g
18V
Note 5 V
S
a e a
15V V
S
b e
4 5V then V
S
b
is changed to
b
18V and V
S
b e b
15V V
S
a e a
4 5V then V
S
a
is changed to
a
18V
Note 6 Slew Rate is measured between V
OUT
e a
5V and
b
5V
Note 7 Slew Rate is measured between V
OUT
e a
2 5V and
b
2 5V
Phase vs Frequency
Voltage Gain and
Active operating area
Active operating area
2009 4
2009 5
2009 6
Applications Information
The EL2009 is a higher bandwidth of the
EL2008 It is recommended that you read the
EL2008 application section
Video Distribution Amplifier
The EL2009 can drive 15 double matched 75
X
cables If the EL2009 is used within an op amp
feedback loop the output levels are independent
of loading The circuit below accepts 1 of 2 inputs
and drives 15 cables Pin 8 of the EL2020 (Dis-
able) is used to multiplex between the inputs and
can be easily expanded to accept more inputs
The circuit as shown when fully loaded has dif-
ferential
phase
k
0 1
and
differential
gain
k
0 1% The 100
X resistor at the EL2009 input
(R1) is necessary to stabilize the loop
The
EL2009 operates with a CLASS AB output which
exhibits a slight rise in output impedance when-
3
TD
is
21in
EL2009C
90 MHz 1 Amp Buffer Amplifier
Applications Information
Contd
ever the current it sources into the load ap-
proaches zero In those cases where differential
gain and phase are measurably affected resistor
R2 may be added to ensure that the EL2009 out-
put current never reaches zero This will result in
a CLASS A output stage with active pulldown
but with the penalty of power dissipation in R2
More information about driving cables can be
found in the EL2003 data sheet
Video Mux and Distribution Amp
2009 3
4
EL2009C
90 MHz 1 Amp Buffer Amplifier
EL2009 Macromodel
Connections
a
input
l
a
Vsupply
l
l
b
Vsupply
l
l
l
output
l
l
l
l
subckt M2009
4
5
1
2
Input Stage
e1 10 0 4 0 1 0
r1 10 0 1K
rh 10 11 1K
ch 11 0 1pF
rc 11 12 6 3K
cc 12 0 0 159pF
e2 13 0 12 0 1 0
Output Stage
q1 1 13 14 qp
q2 5 13 15 qn
q3 5 14 16 qn 10
q4 1 15 19 qp 10
r2 16 2 0 2
r3 19 2 0 2
c1 14 0 1 7pF
c1 15 0 1 7pF
i1 5 14 5mA
i2 15 1 5mA
Bias Current
iin
a
4 0 5
mA
Models
model qn npn (is
e
5e
b
15 bf
e
500)
model qp pnp (is
e
5e
b
15 bf
e
500)
ends
5
TD
is
53in
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