ELANTEC EL5397CU

Triple 200MHz Fixed Gain Amplifier
Features
General Description
• Gain selectable (+1, -1, +2)
• 200MHz -3dB bandwidth (AV = 1,
2)
• 4mA supply current (per amplifier)
• Single and dual supply operation,
from 5V to 10V
• Available in 16-pin QSOP package
• Single (EL5197C) available
• 400MHz, 9mA product available
(EL5196C, EL5396C)
The EL5397C is a triple channel, fixed gain amplifier with a bandwidth of 200MHz, making these amplifiers ideal for today’s high
speed video and monitor applications. The EL5397C features integnal
gain setting resistors and can be configured in a gain of +1, -1 or +2.
The same bandwidth is seen in both gain-of-1 and gain-of-2
applications.
Applications
•
•
•
•
•
•
•
•
Battery-powered Equipment
Hand-held, Portable Devices
Video Amplifiers
Cable Drivers
RGB Amplifiers
Test Equipment
Instrumentation
Current to Voltage Converters
With a supply current of just 4mA per amplifier and the ability to run
from a single supply voltage from 5V to 10V, these amplifiers are also
ideal for hand held, portable or battery powered equipment.
For applications where board space is critical, the EL5397C is offered
in the 16-pin QSOP package, as well as a 16-pin SO. The EL5397C is
specified for operation over the full industrial temperature range of ---40°C to +85°C.
Pin Configurations
Ordering Information
16-Pin SO & QSOP
Package
Tape &
Reel
EL5397CS
16-Pin SO
-
MDP0027
EL5397CS-T7
16-Pin SO
7”
MDP0027
EL5397CS-T13
16-Pin SO
13”
MDP0027
Part No
Outline #
EL5397CU
16-Pin QSOP
-
MDP0040
EL5397CU-T13
16-Pin QSOP
13”
MDP0040
INA+ 1
NC* 2
16 INA+
VS- 3
NC* 4
+
-
13 OUTB
12 INB-
NC 6
11 NC
+
-
INC+ 8
10 OUTC
9 INC-
EL5397CS, EL5397CU
* This pin must be left disconnected
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.
September 19, 2001
NC* 7
15 OUTA
14 VS+
INB+ 5
© 2001 Elantec Semiconductor, Inc.
EL5397C - Preliminary
EL5397C - Preliminary
EL5397C - Preliminary
EL5397C - Preliminary
Triple 200MHz Fixed Gain Amplifier
Absolute Maximum Ratings (T
A
= 25°C)
Values beyond absolute maximum ratings can cause the device to be prematurely damaged. Absolute maximum ratings are stress ratings only
and functional device operation is not implied.
Supply Voltage between VS+ and VS11V
Maximum Continuous Output Current
50mA
Operating Junction Temperature
125°C
Power Dissipation
Pin Voltages
Storage Temperature
Operating Temperature
Lead Temperature
See Curves
VS- - 0.5V to VS+ +0.5V
-65°C to +150°C
-40°C to +85°C
260°C
Important Note:
All parameters having Min/Max specifications are guaranteed. Typ values are for information purposes only. Unless otherwise noted, all tests are at the
specified temperature and are pulsed tests, therefore: TJ = TC = TA.
Electrical Characteristics
VS+ = +5V, VS- = -5V, RL = 150Ω, TA = 25°C unless otherwise specified.
Parameter
Description
Conditions
Min
Typ
Max
Unit
AC Performance
BW
-3dB Bandwidth
AV = +1
200
AV = +2
200
MHz
MHz
20
MHz
2100
V/µs
BW1
0.1dB Bandwidth
SR
Slew Rate
VO = -2.5V to +2.5V, AV = +2
ts
0.1% Settling Time
VOUT = -2.5V to +2.5V, AV = -1
12
ns
CS
Channel Separation
f = 5MHz
67
dB
en
Input Voltage Noise
4.8
nV/√Hz
in-
IN- input current noise
17
pA/√Hz
in+
IN+ input current noise
50
pA/√Hz
dG
Differential Gain Error
AV = +2
0.03
%
dP
Differential Phase Error
AV = +2
0.04
°
[1]
[1]
1900
DC Performance
VOS
Offset Voltage
TCVOS
Input Offset Voltage Temperature Coefficient
Measured from TMIN to TMAX
-10
AE
Gain Error
VO = -3V to +3V
RF, RG
Internal RF and RG
1
10
5
-2
320
400
mV
µV/°C
2
%
480
Ω
Input Characteristics
CMIR
Common Mode Input Range
±3V
±3.3V
+IIN
+ Input Current
-60
1
60
µA
V
-IIN
- Input Current
-30
1
30
µA
RIN
Input Resistance
45
kΩ
CIN
Input Capacitance
0.5
pF
V
Output Characteristics
VO
IOUT
Output Voltage Swing
RL = 150Ω to GND
±3.4V
±3.7V
RL = 1KΩ to GND
±3.8V
±4.0V
V
Output Current
RL = 10Ω to GND
95
120
mA
Supply
IsON
Supply Current
No Load, VIN = 0V
3
4
PSRR
Power Supply Rejection Ratio
DC, VS = ±4.75V to ±5.25V
55
75
-IPSR
- Input Current Power Supply Rejection
DC, VS = ±4.75V to ±5.25V
-2
1. Standard NTSC test, AC signal amplitude = 286mVp-p, f = 3.58MHz
2
5
mA
2
µA/V
dB
Triple 200MHz Fixed Gain Amplifier
Typical Performance Curves
Frequency Response (Gain)
Frequency Response (Phase), All Gains
90
6
AV=2
0
2
-2
AV=1
Phase (°)
-6
-90
-180
-270
-10
RL=150Ω
-14
1M
RL=150Ω
10M
100M
-360
1M
1G
10M
Frequency Response for Various CL
3.5
AV=2
RL=150Ω
10
AV=2
3
2.5
22pF added
6
Delay (ns)
Normalized Magnitude (dB)
1G
Group Delay vs Frequency
14
10pF added
2
2
1.5
AV=1
1
0pF added
-2
-6
1M
10M
0.5
100M
RL=150Ω
0
1M
1G
10M
6
Frequency Response for Various Common-mode Input
Voltages
3V
100M
1G
Frequency (Hz)
Frequency (Hz)
Transimpedance (ROL) vs Frequency
10M
-3V
0
Phase
2
1M
0V
-90
Magnitude (Ω)
Normalized Magnitude (dB)
100M
Frequency (Hz)
Frequency (Hz)
-2
-6
100k
-180
10k
-270
Gain
-10
-14
1M
1k
AV=2
RL=150Ω
-360
10M
100M
100
1k
1G
Frequency (Hz)
3
10k
100k
1M
10M
Frequency (Hz)
100
1G
Phase (°)
Normalized Magnitude (dB)
AV=-1
EL5397C - Preliminary
EL5397C - Preliminary
Triple 200MHz Fixed Gain Amplifier
Typical Performance Curves
PSRR and CMRR vs Frequency
-3dB Bandwidth vs Supply Voltage
250
20
RL=150Ω
PSRR/CMRR (dB)
-20
-3dB Bandwidth (MHz)
PSRR+
0
PSRR-
-40
CMRR
200
AV=2
150
AV=-1
AV=1
-60
-80
10k
100k
1M
10M
100M
100
1G
5
6
10
-3dB Bandwidth vs Temperature
5
300
4
250
-3dB Bandwidth (MHz)
AV=-1
AV=1
Peaking (dB)
9
Total Supply Voltage (V)
Peaking vs Supply Voltage
3
AV=2
2
1
5
200
150
100
50
RL=150Ω
0
8
7
Frequency (Hz)
6
7
8
9
RL=150Ω
0
-40
10
10
Total Supply Voltage (V)
60
110
160
Ambient Temperature (°C)
Peaking vs Temperature
Voltage and Current Noise vs Frequency
1
1000
Voltage Noise (nV/√Hz)
, Current Noise (pA/√Hz)
0.8
Peaking (dB)
EL5397C - Preliminary
EL5397C - Preliminary
0.6
0.4
0.2
100
in+
in-
10
en
RL=150Ω
0
-40
10
60
110
1
100
160
Ambient Temperature (°C)
4
1000
10k
100k
Frequency (Hz)
1M
10M
Triple 200MHz Fixed Gain Amplifier
Typical Performance Curves
Supply Current vs Supply Voltage
100
10
10
8
Supply Current (mA)
Output Impedance (Ω)
Closed Loop Output Impedance vs Frequency
1
0.1
6
4
2
0.01
0.001
100
0
1k
10k
100k
1M
10M
100M
1G
0
2
4
Frequency (Hz)
2nd and 3rd Harmonic Distortion vs Frequency
-20
25
AV=+2
VOUT=2VP-P
RL=100Ω
-40
2nd Order
Distortion
-50
-60
3rd Order
Distortion
-70
-80
1
10
5
0
AV=+2
RL=100Ω
0.01
AV=2
RF=RG=500Ω
RL=150Ω
0.04
dP
0.03
dG
-0.01
-0.02
-0.03
0.5
-0.04
-1
1
DC Input Voltage
dG
-0.01
-0.02
0
dP
0
-0.04
-0.5
AV=1
RF=750Ω
RL=500Ω
0.01
-0.03
-0.05
-1
Differential Gain/Phase vs DC Input
Voltage at 3.58MHz
0.02
0
100
Frequency (MHz)
Differential Gain/Phase vs DC Input
Voltage at 3.58MHz
0.02
dG (%) or dP (°)
15
-10
10
100
dG (%) or dP (°)
0.03
10
Frequency (MHz)
12
AV=+2
RL=150Ω
-5
-90
10
Two-tone 3rd Order
Input Referred Intermodulation Intercept (IIP3)
20
Input Power Intercept (dBm)
Harmonic Distortion (dBc)
-30
6
8
Supply Voltage (V)
-0.5
0
DC Input Voltage
5
0.5
1
EL5397C - Preliminary
EL5397C - Preliminary
Triple 200MHz Fixed Gain Amplifier
Typical Performance Curves
10
Output Voltage Swing vs Frequency
THD<1%
10
Output Voltage Swing vs Frequency
THD<0.1%
RL=500Ω
RL=150Ω
6
8
Output Voltage Swing (VPP)
Output Voltage Swing (VPP)
8
4
2
RL=500Ω
6
RL=150Ω
4
2
AV=2
0
1
AV=2
10
Frequency (MHz)
0
100
Small Signal Step Response
1
10
Frequency (MHz)
100
Large Signal Step Response
VS=±5V
RL=150Ω
AV=2
VS=±5V
RL=150Ω
AV=2
200mV/div
1V/div
10ns/div
10ns/div
Settling Time vs Settling Accuracy
Transimpedance (RoI) vs Temperature
25
625
AV=2
RL=150Ω
VSTEP=5VP-P output
20
600
15
RoI (kΩ)
Settling Time (ns)
EL5397C - Preliminary
EL5397C - Preliminary
10
550
5
0
0.01
575
0.1
525
-40
1
Settling Accuracy (%)
10
60
Die Temperature (°C)
6
110
160
Triple 200MHz Fixed Gain Amplifier
Typical Performance Curves
6
Frequency Response (Gain)
SO8 Package
90
AV=2
2
0
AV=1
-2
Phase (°)
Normalized Magnitude (dB)
AV=-1
Frequency Response (Phase)
SO8 Package
-6
-10
-90
-180
-270
RL=150Ω
RL=150Ω
-14
1M
10M
100M
-360
1M
1G
10M
Frequency (Hz)
PSRR and CMRR vs Temperature
1G
ICMR and IPSR vs Temperature
90
2
80
PSRR
1.5
ICMR/IPSR (µA/V)
70
PSRR/CMRR (dB)
100M
Frequency (Hz)
60
CMRR
50
40
30
ICMR+
1
IPSR
0.5
ICMR-
0
20
10
-40
10
60
110
-0.5
-40
160
10
Die Temperature (°C)
60
110
160
Die Temperature (°C)
Offset Voltage vs Temperature
Input Current vs Temperature
2
60
40
Input Current (µA)
VOS (mV)
1
0
20
IB0
-20
IB+
-1
-40
-2
-40
10
60
110
-60
-40
160
Die Temperature (°C)
10
60
Die Temperature (°C)
7
110
160
EL5397C - Preliminary
EL5397C - Preliminary
Triple 200MHz Fixed Gain Amplifier
Typical Performance Curves
Positive Input Resistance vs Temperature
Supply Current vs Temperature
60
5
50
Supply Current (mA)
4
RIN+ (kΩ)
40
30
20
3
2
1
10
0
-40
10
60
110
0
-40
160
110
160
Die Temperature (°C)
Negative Output Swing vs Temperature for Various Loads
Positive Output Swing vs Temperature for Various Loads
-3.5
4.2
150Ω
-3.6
4.1
1kΩ
4
-3.7
3.9
VOUT (V)
VOUT (V)
60
10
Die Temperature (°C)
3.8
3.7
-3.8
-3.9
-4
150Ω
1kΩ
-4.1
3.6
3.5
-40
60
10
110
-4.2
-40
160
110
160
Die Temperature (°C)
Slew Rate vs Temperature
Output Current vs Temperature
4000
130
Sink
Slew Rate (V/µS)
125
120
60
10
Die Temperature (°C)
IOUT (mA)
EL5397C - Preliminary
EL5397C - Preliminary
Source
3500
3000
AV=2
RF=RG=500Ω
RL=150Ω
115
-40
10
60
110
2500
-40
160
10
60
Die Temperature (°C)
Die Temperature (°C)
8
110
160
Triple 200MHz Fixed Gain Amplifier
Typical Performance Curves
1
Package Power Dissipation vs Ambient Temp.
JEDEC JESD51-3 Low Effective Thermal Conductivity Test Board
0.9
909mW
Power Dissipation (W)
0.8
11
0
0.7
0.6 633mW
0.5
SO
1
°C
/W
6
QS
OP
16
15
8°
C/ W
0.4
0.3
0.2
0.1
0
0
25
50
75
100
125
150
Ambient Temperature (°C)
9
EL5397C - Preliminary
EL5397C - Preliminary
EL5397C - Preliminary
EL5397C - Preliminary
Triple 200MHz Fixed Gain Amplifier
Pin Descriptions
EL5396C
16-Pin SO & 16Pin QSOP
Pin Name
1
INA+
Function
Equivalent Circuit
Non-inverting input, Channel A
RG
IN+
RF
Circuit1
2
CEA
Amplifier A enable
CE
Circuit 2
3
VS-
Negative supply
4
CEB
Amplifier B enable
(Reference Circuit 2)
5
INB+
Non-inverting input, Channel B
(Reference Circuit 1)
6
NC
Not connected
7
CEC
Amplifier C enable
(Reference Circuit 2)
8
INC+
Non-inverting input, Channel C
(Reference Circuit 1)
9
INC-
Inverting input, Channel C
(Reference Circuit 1)
10
OUTC
Output, Channel C
OUT
RF
Circuit 3
11
NC
12
INB-
13
OUTB
14
VS+
15
OUTA
16
INA-
Not connected
Inverting input, Channel B
(Reference Circuit 1)
Output, Channel B
(Reference Circuit 3)
Positive supply
Output, Channel A
(Reference Circuit 3)
Inverting input, Channel A
(Reference Circuit 1)
10
IN-
Triple 200MHz Fixed Gain Amplifier
Applications Information
Product Description
particularly for the SO package, should be avoided if
possible. Sockets add parasitic inductance and capacitance which will result in additional peaking and
overshoot.
The EL5397C is a current-feedback operational amplifier that offers a wide -3dB bandwidth of 300MHz and a
low supply current of 4mA per amplifier. The EL5397C
works with supply voltages ranging from a single 5V to
10V and they are also capable of swinging to within 1V
of either supply on the output. Because of their currentfeedback topology, the EL5397C does not have the normal gain-bandwidth product associated with voltagefeedback operational amplifiers. Instead, its -3dB bandwidth to remain relatively constant as closed-loop gain is
increased. This combination of high bandwidth and low
power, together with aggressive pricing make the
EL5397C the ideal choice for many low-power/highbandwidth applications such as portable, handheld, or
battery-powered equipment.
Capacitance at the Inverting Input
Any manufacturer’s high-speed voltage- or currentfeedback amplifier can be affected by stray capacitance
at the inverting input. For inverting gains, this parasitic
capacitance has little effect because the inverting input is
a virtual ground, but for non-inverting gains, this capacitance (in conjunction with the feedback and gain
resistors) creates a pole in the feedback path of the
amplifier. This pole, if low enough in frequency, has the
same destabilizing effect as a zero in the forward openloop response. The use of large-value feedback and gain
resistors exacerbates the problem by further lowering
the pole frequency (increasing the possibility of
oscillation.)
For varying bandwidth needs, consider the EL5191C
with 1GHz on a 9mA supply current or the EL5192C
with 600MHz on a 6mA supply current. Versions
include single, dual, and triple amp packages with 5-pin
SOT23, 16-pin QSOP, and 8-pin or 16-pin SO outlines.
The EL5397C has been optimized with a 475Ω feedback
resistor. With the high bandwidth of these amplifiers,
these resistor values might cause stability problems
when combined with parasitic capacitance, thus ground
plane is not recommended around the inverting input pin
of the amplifier.
Power Supply Bypassing and Printed Circuit
Board Layout
As with any high frequency device, good printed circuit
board layout is necessary for optimum performance.
Low impedance ground plane construction is essential.
Surface mount components are recommended, but if
leaded components are used, lead lengths should be as
short as possible. The power supply pins must be well
bypassed to reduce the risk of oscillation. The combination of a 4.7µF tantalum capacitor in parallel with a
0.01µF capacitor has been shown to work well when
placed at each supply pin.
Feedback Resistor Values
The EL5397C has been designed and specified at a gain
of +2 with RF approximately 500Ω. This value of feedback resistor gives 200MHz of -3dB bandwidth at A V=2
with 2dB of peaking. With AV=-2, an RF of approximately 500Ω gives 175MHz of bandwidth with 0.2dB of
peaking. Since the EL5397C is a current-feedback
amplifier, it is also possible to change the value of RF to
get more bandwidth. As seen in the curve of Frequency
Response for Various RF and RG, bandwidth and peaking can be easily modified by varying the value of the
feedback resistor.
For good AC performance, parasitic capacitance should
be kept to a minimum, especially at the inverting input.
(See the Capacitance at the Inverting Input section) Even
when ground plane construction is used, it should be
removed from the area near the inverting input to minimize any stray capacitance at that node. Carbon or
Metal-Film resistors are acceptable with the Metal-Film
resistors giving slightly less peaking and bandwidth
because of additional series inductance. Use of sockets,
Because the EL5397C is a current-feedback amplifier,
its gain-bandwidth product is not a constant for different
closed-loop gains. This feature actually allows the
EL5397C to maintain about the same -3dB bandwidth.
As gain is increased, bandwidth decreases slightly while
11
EL5397C - Preliminary
EL5397C - Preliminary
EL5397C - Preliminary
EL5397C - Preliminary
Triple 200MHz Fixed Gain Amplifier
stability increases. Since the loop stability is improving
with higher closed-loop gains, it becomes possible to
reduce the value of RF below the specified 475Ω and
still retain stability, resulting in only a slight loss of
bandwidth with increased closed-loop gain.
EL5397C has dG and dP specifications of 0.03% and
0.04°.
Output Drive Capability
In spite of its low 4mA of supply current, the EL5397C
is capable of providing a minimum of ±120mA of output
current. With a minimum of ±120mA of output drive,
the EL5397C is capable of driving 50Ω loads to both
rails, making it an excellent choice for driving isolation
transformers in telecommunications applications.
Supply Voltage Range and Single-Supply
Operation
The EL5397C has been designed to operate with supply
voltages having a span of greater than 5V and less than
10V. In practical terms, this means that the EL5397C
will operate on dual supplies ranging from ±2.5V to
±5V. With single-supply, the EL5397C will operate
from 5V to 10V.
Driving Cables and Capacitive Loads
As supply voltages continue to decrease, it becomes necessary to provide input and output voltage ranges that
can get as close as possible to the supply voltages. The
EL5397C has an input range which extends to within 2V
of either supply. So, for example, on +5V supplies, the
EL5397C has an input range which spans ±3V. The output range of the EL5397C is also quite large, extending
to within 1V of the supply rail. On a ±5V supply, the
output is therefore capable of swinging from -----4V to
+4V. Single-supply output range is larger because of the
increased negative swing due to the external pull-down
resistor to ground.
When used as a cable driver, double termination is
always recommended for reflection-free performance.
For those applications, the back-termination series resistor will decouple the EL5397C from the cable and allow
extensive capacitive drive. However, other applications
may have high capacitive loads without a back-termination resistor. In these applications, a small series resistor
(usually between 5Ω and 50Ω) can be placed in series
with the output to eliminate most peaking. The gain
resistor (RG) can then be chosen to make up for any gain
loss which may be created by this additional resistor at
the output. In many cases it is also possible to simply
increase the value of the feedback resistor (RF) to reduce
the peaking.
Video Performance
Current Limiting
For good video performance, an amplifier is required to
maintain the same output impedance and the same frequency response as DC levels are changed at the output.
This is especially difficult when driving a standard video
load of 150Ω, because of the change in output current
with DC level. Previously, good differential gain could
only be achieved by running high idle currents through
the output transistors (to reduce variations in output
impedance.) These currents were typically comparable
to the entire 4mA supply current of each EL5397C
amplifier. Special circuitry has been incorporated in the
EL5397C to reduce the variation of output impedance
with current output. This results in dG and dP specifications of 0.03% and 0.04°, while driving 150Ω at a gain
of 2.
The EL5397C has no internal current-limiting circuitry.
If the output is shorted, it is possible to exceed the Absolute Maximum Rating for output current or power
dissipation, potentially resulting in the destruction of the
device.
Power Dissipation
With the high output drive capability of the EL5397C, it
is possible to exceed the 150°C Absolute Maximum
junction temperature under certain very high load current conditions. Generally speaking when RL falls below
about 25Ω, it is important to calculate the maximum
junction temperature (TJMAX ) for the application to
determine if power supply voltages, load conditions, or
package type need to be modified for the EL5397C to
Video performance has also been measured with a 500Ω
load at a gain of +1. Under these conditions, the
12
Triple 200MHz Fixed Gain Amplifier
remain in the safe operating area. These parameters are
calculated as follows:
PDMAX for each amplifier can be calculated as follows:
V OUTMAX
PD MAX = ( 2 × V S × I SMAX ) + ( V S – V OUTMAX ) × ---------------------------R
T JMAX = T MAX + ( θ JA × n × PD MAX )
L
where:
where:
TMAX = Maximum Ambient Temperature
VS = Supply Voltage
θJA = Thermal Resistance of the Package
ISMAX = Maximum Supply Current of 1A
n = Number of Amplifiers in the Package
VOUTMAX = Maximum Output Voltage (Required)
RL = Load Resistance
PDMAX = Maximum Power Dissipation of Each
Amplifier in the Package
13
EL5397C - Preliminary
EL5397C - Preliminary
EL5397C - Preliminary
EL5397C - Preliminary
Triple 200MHz Fixed Gain 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.
September 19, 2001
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 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 Semiconductor, Inc.
675 Trade Zone Blvd.
Milpitas, CA 95035
Telephone: (408) 945-1323
(888) ELANTEC
Fax:
(408) 945-9305
European Office: +44-118-977-6020
Japan Technical Center: +81-45-682-5820
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Printed in U.S.A.