Elantec EL2030C 120 mhz current feedback amplifier Datasheet

EL2030C
EL2030C
120 MHz Current Feedback Amplifier
Features
General Description
# b 3 dB bandwidth e 120 MHz,
AV e 1
# b 3 dB bandwidth e 110 MHz,
AV e 2
# 0.01% differential gain and
0.01§ differential phase (NTSC,
PAL)
# 0.05% differential gain and
0.02§ differential phase (HDTV)
# Slew rate 2000 V/ms
# 65 mA output current
# Drives g 10V into 200X load
# Characterized at g 5V and g 15V
# Low voltage noise
# Current mode feedback
# Settling time of 40 ns to 0.25%
for a 10V step
# Output short circuit protected
# Low cost
The EL2030 is a very fast, wide bandwidth amplifier optimized
for gains between b 10 and a 10. Built using the Elantec monolithic Complementary Bipolar process, this amplifier uses current mode feedback to achieve more bandwidth at a given gain
than a conventional voltage feedback operational amplifier.
Applications
#
#
#
#
#
#
Video gain block
Video distribution amplifier
HDTV amplifier
Residue amplifiers in ADC
Current to voltage converter
Coax cable driver
Due to its wide operating supply range ( g 15V) and extremely
high slew rate of 2000 V/ms, the EL2030 drives g 10V into 200X
at a frequency of 30 MHz, while achieving 110 MHz of small
signal bandwidth at AV e a 2. This bandwidth is still 95 MHz
for a gain of a 10. On g 5V supplies the amplifier maintains a
90 MHz bandwidth for AV e a 2. When used as a unity gain
buffer, the EL2030 has a 120 MHz bandwidth with the gain
precision and low distortion of closed loop buffers.
The EL2030 features extremely low differential gain and phase,
a low noise topology that reduces noise by a factor of 2 over
competing amplifiers, and settling time of 40 ns to 0.25% for a
10V step. The output is short circuit protected. In addition, datasheet limits are guaranteed for g 5V and g 15V supplies.
Elantec’s products and facilities comply with applicable quality
specifications. See Elantec document, QRA-1: Processing,
Monolithic Integrated Circuits.
Connection Diagrams
Mini DIP
SOL
Ordering Information
Package
OutlineÝ
EL2030CN
Part No.
Temp. Range
b 40§ C to a 85§ C
8-Pin P-DIP
MDP0031
EL2030CM
b 40§ C to a 85§ C
20-Lead SOL
MDP0027
2030 – 1
Top View
Note: Non-designated pins are no connects
and are not electrically connected internally.
Manufactured under U.S. Patent No. 4,893,091.
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.
December 1995 Rev F
2030 – 3
Top View
EL2030C
120 MHz Current Feedback Amplifier
Absolute Maximum Ratings (TA e 25§ C)
VS
VIN
DVIN
PD
IIN
IOP
TA
TJ
g 18V or 36V
Supply Voltage
g 15V or VS
Input Voltage
g 6V
Differential Input Voltage
Maximum Power Dissipation
See Curves
g 10 mA
Input Current
Peak Output Current
Short Circuit Protected
Output Short Circuit Duration
Continuous
(Note 1)
TST
Operating Temperature Range
Operating Junction Temperature
Plastic Packages
Storage Temperature
b 40§ C to a 85§ C
150§ C
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 TJ e TC e TA.
Test Level
I
II
III
IV
V
Test Procedure
100% production tested and QA sample tested per QA test plan QCX0002.
100% production tested at TA e 25§ C and QA sample tested at TA e 25§ C ,
TMAX and TMIN per QA test plan QCX0002.
QA sample tested per QA test plan QCX0002.
Parameter is guaranteed (but not tested) by Design and Characterization Data.
Parameter is typical value at TA e 25§ C for information purposes only.
Open Loop DC Electrical Characteristics VS e g 15V, RL e 200X, unless otherwise specified
Parameter
Description
Condition
Temp
Min
Typ
Max
Test Level
Units
VOS
Input Offset Voltage
25§ C
VS e g 15V
10
TMIN, TMAX
25§ C
VS e g 5V
5
TMIN, TMAX
DVOS/DT
Offset Voltage Drift
a IIN
a Input Current
b Input Current
25§ C
VS e g 5V, g 15V
5
25§ C
VS e g 5V, g 15V
a RIN
a Input Resistance
Full
CIN
Input Capacitance
25§ C
CMRR
Common Mode
Rejection Ratio (Note 2)
PSRR
a IPSR
VS e g 5V, g 15V
Full
Input Current Common
25§ C
Mode Rejection (Note 2)
TMIN, TMAX
Power Supply Rejection
Ratio (Note 3)
Full
25§ C
a Input Current Power
Supply Rejection (Note 3)
b IPSR
mV
mV
10
I
mV
15
III
mV
V
mV/§ C
1.1
50
25§ C
Supply Rejection (Note 3)
TMIN, TMAX
2
mA
III
mA
I
mA
III
mA
2.0
II
MX
1
V
pF
60
II
dB
10
I
mA/V
20
III
mA/V
II
dB
70
0.1
TMIN, TMAX
b Input Current Power
I
25
40
5
60
15
50
10
TMIN, TMAX
b ICMR
I
III
25
TMIN, TMAX
b IIN
20
30
0.5
0.5
II
mA/V
1.0
III
mA/V
5.0
II
mA/V
8.0
III
mA/V
TD is 3.6in
EL2030C
EL2030C
120 MHz Current Feedback Amplifier
Open Loop DC Electrical Characteristics
VS e g 15V, RL e 200X, unless otherwise specified Ð Contd.
Parameter
Description
Condition
Temp
Min
Typ
Max
Test Level
Units
ROL
Transimpedance
(DVOUT/D(bIIN))
VOUT e g 10V
VS e g 15V
VOUT e g 2.5V
VS e g 5V
(Note 6)
AVOL
VO
88
75
25§ C
80
150
II
V/mA
III
V/mA
120
II
V/mA
70
III
V/mA
TMIN, TMAX
Open Loop DC
Voltage Gain
VOUT e g 10V
VS e g 15V
VOUT e g 2.5V
(Note 6)
Output Voltage Swing
(Note 6)
25§ C
TMIN, TMAX
Full
60
70
II
dB
VS e g 5V
Full
56
65
II
dB
V
VS e g 15V
Full
12
13
II
VS e g 5V
Full
3
3.5
II
V
VS e g 15V
Full
60
65
II
mA
Full
30
mA
IOUT
Output Current
(Note 9)
35
II
ROUT
Output Resistance
25§ C
5
V
X
IS
Quiescent Supply Current
Full
15
II
mA
ISC
Short Circuit Current
25§ C
85
V
mA
VS e g 5V
21
TD is 2.8in
EL2030C
Closed Loop AC Electrical Characteristics
VS e g 15V, AV e a 2, RF e 820X, RG e 820X and RL e 200X
Parameter
Description
Condition
Temp
Min
Typ
Max
Test Level
Units
SR
Slew Rate (Note 7)
FPBW
Full Power Bandwidth
(Note 4)
1200
2000
IV
V/ms
25§ C
19
31.8
IV
MHz
25§ C
3
V
ns
25§ C
40
V
ns
tr, tf
Rise Time. Fall Time
ts
Settling Time to 0.25%
for 10V step (Note 5)
DG
Differential Gain (Note 8)
25§ C
0.01
V
% p-p
Dw
Differential Phase
(Note 8)
25§ C
0.01
V
§ p-p
eN
Input Spot Noise at 1 kHz
RG e 101; RF e 909
25§ C
4
V
nV/0Hz
Note
Note
Note
Note
Note
Note
Note
Note
Note
Vpp e 250 mV
25§ C
1: A heat sink is required to keep the junction temperature below absolute maximum when the output is shorted.
2: VCM e g 10V for VS e g 15V. For VS e g 5V, VCM e g 2.5V.
3: VOS is measured at VS e g 4.5V and at VS e g 18V. Both supplies are changed simultaneously.
4: Full Power Bandwidth is specified based on Slew Rate measurement FPBW e SR/2qVP.
5: Settling Time measurement techniques are shown in: ‘‘Take The Guesswork Out of Settling Time Measurements’’, EDN,
September 19, 1985. Available from the factory upon request.
6: RL e 100X.
7: VO e g 10V, tested at VO e g 5. See test circuit.
8: NTSC (3.58 MHz) and PAL (4.43 MHz).
9: For VS e g 15V, VOUT e g 10V. For VS g 5V, VOUT e g 2.5V.
3
TD is 1.9in
EL2030C
EL2030C
120 MHz Current Feedback Amplifier
Typical Performance Curves
2030 – 5
Figure 1. NTSC Video Differential Gain and Phase Test Set-Up
Differential Gain and Phase
vs Load Resistance, Gain e a 1
Differential Gain and Phase
vs Load Capacitance, Gain e a 1
Differential Gain and Phase
vs Supply Voltage, Gain e a 1
Differential Gain and Phase
vs Load Resistance, Gain e a 2
Differential Gain and Phase
vs Load Capacitance, Gain e a 2
Differential Gain and Phase
vs Supply Voltage, Gain e a 2
2030 – 6
4
EL2030C
120 MHz Current Feedback Amplifier
Typical Performance Curves Ð Contd.
2030 – 7
Figure 2. HDTV and Wideband Video Differential Gain and Phase Test Set-Up
Differential Phase Error
vs Frequency for Various
DC Output Levels
Differential Gain Error
vs Frequency for Various
DC Output Levels
Risetime and Overshoot vs RF
for AV e a 1
Bandwidth and Peaking vs
RF for AV e a 1
g Slew Rate vs Supply Voltage
2030 – 8
5
EL2030C
120 MHz Current Feedback Amplifier
Typical Performance Curves Ð Contd.
Risetime and Overshoot vs RF
for AV e a 2
Bandwidth and Peaking vs
RF for AV e a 2
b 3 dB Bandwidth vs
Supply Voltage
Risetime and Overshoot vs
RF for AV e a 10
Bandwidth and Peaking vs
RF for AV e a 10
Voltage Gain vs Frequency
for AV e a 2, various
Capacitive Loads
Risetime and Overshoot vs RF
for AV e a 2, VS e g 5V
Bandwidth and Peaking vs RF
for AV e a 2, VS e a 5V
Output Settling Error
vs Time
2030 – 9
6
EL2030C
120 MHz Current Feedback Amplifier
Typical Performance Curves Ð Contd.
Output Settling Error vs
Time, VS e g 5V
Output Swing vs Supply Voltage
Current Limit vs Temperature
Input Offset Voltage vs
Temperature
Input Bias Current vs
Temperature
Transimpedance (ROL)
Supply Current vs
Supply Voltage
Power Supply Rejection
vs Frequency
Common Mode Rejection
vs Frequency
2030 – 10
7
EL2030C
120 MHz Current Feedback Amplifier
Typical Performance Curves Ð Contd.
Equivalent Input Noise
Long-Term Output Settling
Error vs Time
Long-Term Output Settling Error
vs Time, VS e g 5V
20-Lead SOL
Maximum Power Dissipation
vs Ambient Temperature
8-Lead Plastic DIP
Maximum Power Dissipation
vs Ambient Temperature
2030 – 11
8
EL2030C
120 MHz Current Feedback Amplifier
Typical Performance Curves Ð Contd.
Large Signal Response
Large Signal Response
AV e a 1, RF e 1 kX,
RL e 200X, VS e g 15V
2030 – 12
AV e a 2, RF e RG e 820,
RL e 200X, VS e g 15V
Large Signal Response
2030 – 13
Large Signal Response
AV e a 10, RF e 750, RG e 82X,
RL e 200X, VS e g 15V
AV e a 2, RF e RG e 750X,
RL e 200X, VS e g 15V
2030 – 14
Burn-In Circuit
2030 – 15
Test Circuit
2030 – 16
ALL PACKAGES USE THE SAME SCHEMATIC.
2030 – 17
9
EL2030C
120 MHz Current Feedback Amplifier
An industry standard way of measuring the distortion of a video component (or system) is to
measure the amount of differential gain and
phase error it introduces. A 100 mV peak to peak
sine wave at 3.58 MHz for NTSC (4.3 MHz for
PAL), with 0V DC component serves as the reference. The reference signal is added to a DC offset,
shifting the sine wave from 0V to 0.7V which is
then applied to the device under test (DUT). The
output signal from the DUT is compared to the
reference signal. The Differential Gain is a measure of the change in amplitude of the sine wave
and is measured in percent. The Differential
Phase is a measure of the change in the phase of
the sine wave and is measured in degrees. Typically, the maximum positive and negative deviations are summed to give peak differential gain
and differential phase errors. The test setup in
Figure 1 was used to characterize the EL2030.
For higher than NTSC and PAL frequencies, an
alternate Differential Gain and Phase measurement can be made using an HP3577A Network
Analyser and the setup shown in Figure 2. The
frequency response is normalized to gain or phase
with 0V DC at the input. From the normalized
value a DC offset voltage is introduced and the
Differential Gain or Phase is the deviation from
the normalized value.
Application Information
Product Description
The EL2030 is a current mode feedback amplifier
similar to the industry standard EL2020, but
with greatly improved AC characteristics. Most
significant among these are the extremely wide
bandwidth and very low differential gain and
phase. In addition, the EL2030 is fully characterized and tested at g 5V and g 15V supplies.
Power Supply Bypassing/Lead Dressing
It is important to bypass the power supplies of
the EL2030 with 0.1 mF ceramic disc capacitors.
Although the lead length is not critical, it should
not be more the (/2 inch from the IC pins. Failure
to do this will result in oscillation, and possible
destruction of the part. Another important detail
is the lead length of the inputs. The inputs
should be designed with minimum stray capacitance and short lead lengths to avoid ringing and
distortion.
Latch Mode
The EL2030 can be damaged in certain circumstances resulting in catastrophic failure in which
destructive supply currents flow in the device.
Specifically, an input signal greater than g 5
volts at currents greater than 5 mA is applied to
the device when the power supply voltages are
zero will result in failure of the device.
Video Applications
The video signals that must be transmitted for
modest distances are usually amplified by a device such as the EL2030 and carried via coax cable. There are at least two ways to drive cables,
single terminated and double terminated.
In addition, the EL2030 will be destroyed or
damaged in the same way for momentary power
supply voltage reversals. This could happen, for
example, during a power turn on transient, or if
the power supply voltages were oscillating and
the positive rail were instantaneously negative
with respect to the negative rail or vice versa.
When driving a cable, it is important to terminate it properly to avoid unwanted signal reflections. Single termination (75X to ground at receive end) may be sufficient for less demanding
applications. In general, a double terminated cable (75X in series at drive end and 75X to ground
at receive end) is preferred since the impedance
match at both ends of the line will absorb signal
reflections. However, when double termination is
used (a total impedance of 150X), the received
signal is reduced by half; therefore, the amplifier
is usually set at a gain of 2 or higher to compensate for attenuation.
Differential Gain and Differential Phase
Composite video signals contain intensity, color,
hue, timing and audio information in AM, FM,
and Phase Modulation. These video signals pass
through many stages during their production,
processing, archiving and transmission. It is important that each stage not corrupt these signals
to provide a ‘‘high fidelity’’ image to the end
viewer.
10
EL2030C
120 MHz Current Feedback Amplifier
can be optimized when the supplies are increased
to g 15V, especially at 30 MHz HDTV applications. This is primarily due to a reduction in internal parasitic junction capacitance with increased power supply voltage.
Video Applications Ð Contd.
Video signals are 1V peak-peak in amplitude,
from sync tip to peak white. There are 100 IRE
(0.714V) of picture (from black to peak white of
the transmitted signal) and 40 IRE (0.286V) of
sync in a composite video signal (140 IRE e 1V).
The following table summarizes the behavior of
the EL2030 at g 5V and g 15V for NTSC. In addition, 30 MHz HDTV data is included. Refer to
the differential gain and phase typical performance curves for more data.
For video applications where a gain of two is
used (double termination), the output of the video amplifier will be a maximum of 2V peak-peak.
With g 5V power supply, the EL2030 output
swing of 3.5V is sufficient to satisfy the video
output swing requirements. The EL2030 can
drive two double terminated coax cables under
these conditions. With g 15V supplies, driving
four double terminated cables is feasible.
g Vs Rload Av DGain DPhase
15V
15V
5V
15V
15V
5V
15V
Although the EL2030’s video characteristics (differential gain and phase) are impressive with
g 5V supplies at NTSC and PAL frequencies, it
75X
150X
150X
75X
150X
150X
150X
1
1
1
2
2
2
2
0.02%
0.02%
0.05%
0.02%
0.01%
0.03%
0.05%
0.03§
0.02§
0.02§
0.08§
0.02§
0.09§
0.02§
Comments
Single terminated
Double terminated
Double terminated
Single terminated
Double terminated
Double terminated
HDTV, Double terminated
Equivalent Circuit
2030 – 18
11
EL2030C
TAB WIDE
120 MHz Current Feedback Amplifier
EL2030 Macromodel
* Revision A. March 1992
* Enhancements include PSRR, CMRR, and Slew Rate Limiting
a input
* Connections:
b input
*
l
a Vsupply
*
l
l
b Vsupply
*
l
l
l
output
*
l
l
l
l
*
l
l
l
l
l
7
4
6
TD is 6.5in
.subckt M2030
3
2
*
* Input Stage
*
e1 10 0 3 0 1.0
vis 10 9 0V
h2 9 12 vxx 1.0
r1 2 11 50
l1 11 12 48nH
iinp 3 0 5mA
iinm 2 0 10mA
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 0.5mH
c5 17 0 1pF
r5 17 0 500
*
* Transimpedance Stage
*
g1 0 18 17 0 1.0
rol 18 0 150K
cdp 18 0 2.8pF
*
* 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
12
EL2030C
120 MHz Current Feedback Amplifier
EL2030 Macromodel Ð Contd.
TD is 3.1in
ios1 7 19 2.5mA
ios2 20 4 2.5mA
*
* Supply Current
*
ips 7 4 9mA
*
* Error Terms
*
ivos 0 23 5mA
vxx 23 0 0V
e4 24 3 1.0
e5 25 0 7 0 1.0
e6 26 0 4 0 1.0
r9 24 23 3K
r10 25 23 1K
r11 26 23 1K
*
* Models
*
.model qn npn (is e 5eb15 bf e 100 tf e 0.1nS)
.model qp pnp (is e 5eb15 bf e 100 tf e 0.1nS)
.model dclamp d(is e 1eb30 ibv e 0.266 bv e 3.7 n e 4)
.ends
13
EL2030C
120 MHz Current Feedback Amplifier
EL2030 Macromodel Ð Contd.
2030 – 19
14
15
BLANK
EL2030C
EL2030C
120 MHz Current Feedback Amplifier
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.
December 1995 Rev F
WARNING Ð 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 intended 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 replacement of defective components and does not cover injury to persons or property or other consequential damages.
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
16
Printed in U.S.A.