Elantec EL5196CW-T7 Single 400mhz fixed gain amplifier Datasheet

Single 400MHz Fixed Gain Amplifier
Features
General Description
•
•
•
•
The EL5196C is a fixed gain amplifier with a bandwidth of 400MHz,
making these amplifiers ideal for today’s high speed video and monitor applications. The EL5196C features internal 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.
Gain selectable (+1, -1, +2)
400MHz -3dB BW (AV = 1, 2)
9mA supply current
Single and dual supply operation,
from 5V to 10V
• Available in 5-pin SOT23 package
• Triple (EL5396C) available
• 200MHz, 4mA product available
(EL5197C, EL5397C)
EL5196C - Preliminary
EL5196C - Preliminary
For applications where board space is critical, the EL5196C is offered
in the 5-pin SOT23 package, as well as an 8-pin SO. The EL5196C
operates over the industrial temperature range of -40°C to +85°C.
Applications
•
•
•
•
•
•
Video Amplifiers
Cable Drivers
RGB Amplifiers
Test Equipment
Instrumentation
Current to Voltage Converters
Ordering Information
Part No
Package
Pin Configurations
Tape &
Reel
Outline #
MDP0038
EL5196CW-T7
5-Pin SOT23
7”
EL5196CW-T13
5-Pin SOT23
13”
MDP0038
EL5196CS
8-Pin SO
-
MDP0027
EL5196CS-T7
8-Pin SO
7”
MDP0027
EL5196CS-T13
8-Pin SO
13”
MDP0027
8-Pin SO
5-Pin SOT23
OUT 1
VS- 2
NC 1
5 VS+
+
-
IN+ 3
4 IN-
IN- 2
8 NC*
+
7 VS+
IN+ 3
6 OUT
VS- 4
5 NC
EL5196CS
* 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.
© 2001 Elantec Semiconductor, Inc.
September 19, 2001
EL5196CW
EL5196C - Preliminary
EL5196C - Preliminary
Single 400MHz 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
400
MHz
AV = -1
400
MHz
AV = +2
400
MHz
35
MHz
2900
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
en
2500
9
ns
Input Voltage Noise
3.8
nV/√Hz
in-
IN- input current noise
25
pA/√Hz
in+
IN+ input current noise
55
pA/√Hz
dG
Differential Gain Error
AV = +2
0.035
%
dP
Differential Phase Error
AV = +2
0.04
°
[1]
[1]
DC Performance
VOS
Offset Voltage
TCVOS
Input Offset Voltage Temperature Coefficient
Measured from TMIN to TMAX
-15
AE
Gain Error
VO = -3V to +3V
RF, RG
Internal RF and RG
1
15
5
mV
µV/°C
-2
1.3
2
%
320
400
480
Ω
Input Characteristics
CMIR
Common Mode Input Range
±3V
±3.3V
+IIN
+ Input Current
-120
40
120
µA
-IIN
- Input Current
4
40
µA
RIN
Input Resistance
CIN
Input Capacitance
-40
at IN+
V
27
kΩ
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
8
9
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
10.5
mA
2
µA/V
dB
Single 400MHz Fixed Gain Amplifier
Typical Performance Curves
90
AV=-1
2
Frequency Response (Phase)
SOT23 Package
0
All Gains
-2
AV=2
Phase (°)
AV=1
-6
-10
-90
-180
-270
RL=150Ω
-14
1M
RL=150Ω
10M
100M
-360
1M
1G
10M
Frequency (Hz)
-3.5
14
AV=2
RL=150Ω
RL=150Ω
-3
8pF added
6
-2.5
4pF added
Delay (ns)
Normalized Magnitude (dB)
1G
Group Delay vs Frequency, All Gains
Frequency Response for Various CL
10
100M
Frequency (Hz)
2
-2
All Gains
-1.5
-1
0pF added
-2
-6
1M
10M
100M
-0.5
0
1M
1G
10M
6
100M
1G
Frequency (Hz)
Frequency (Hz)
Frequency Response for Various Common-mode Input
Voltages
Transimpedance (ROL) vs Frequency
10M
2
0
Phase
1M
-90
Magnitude (Ω)
Normalized Magnitude (dB)
VCM=3V
-2
-6
VCM=-3V
100k
-180
10k
-270
Gain
-10
-14
1M
1k
AV=2
RL=150Ω
VCM=0V
10M
100M
-360
100
1k
1G
Frequency (Hz)
3
10k
100k
1M
10M
Frequency (Hz)
100
1G
Phase (°)
Normalized Magnitude (dB)
6
Frequency Response (Gain)
SOT23 Package
EL5196C - Preliminary
EL5196C - Preliminary
Single 400MHz Fixed Gain Amplifier
Typical Performance Curves
PSRR and CMRR vs Frequency
-3dB Bandwidth vs Supply Voltage
450
20
AV=1
PSRR+
-20
-3dB Bandwidth (MHz)
PSRR/CMRR (dB)
0
PSRR-
-40
CMRR
-60
AV=-1
400
AV=2
350
RL=150Ω
-80
10k
100k
1M
10M
100M
300
1G
5
6
7
Frequency (Hz)
8
9
10
Total Supply Voltage (V)
Peaking vs Supply Voltage
-3dB Bandwidth vs Temperature
4
600
500
-3dB Bandwidth (MHz)
Peaking (dB)
3
AV=1
2
AV=2
AV=-1
1
0
5
400
300
200
100
RL=150Ω
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
0.6
1000
RL=150Ω
Voltage Noise (nV/√Hz)
, Current Noise (pA/√Hz)
0.5
Peaking (dB)
EL5196C - Preliminary
EL5196C - Preliminary
0.4
0.3
0.2
100
in+
in-
10
en
0.1
0
-40
10
60
110
1
100
160
Ambient Temperature (°C)
4
1000
10k
100k
Frequency (Hz)
1M
10M
Single 400MHz Fixed Gain Amplifier
Typical Performance Curves
Supply Current vs Supply Voltage
Closed Loop Output Impedance vs Frequency
100
10
8
Supply Current (mA)
Output Impedance (Ω)
10
1
0.1
0.01
6
4
2
0
0.001
-2
100
10k
1M
Frequency (Hz)
100M
0
1G
-10
30
AV=+2
VOUT=2VP-P
RL=100Ω
-40
2nd Order
Distortion
-50
-60
-70
3rd Order
Distortion
-80
-90
100
0.01
AV=2
RF=RG=250Ω
RL=150Ω
12
15
10
5
0
-5
AV=+2
RL=100Ω
=150Ω
100
200
Frequency (MHz)
0.03
dP
Differential Gain/Phase vs DC Input
Voltage at 3.58MHz
0.02
0.01
0
dG
-0.01
-0.02
-0.03
AV=1
RF=375Ω
RL=500Ω
dP
0
dG
-0.01
-0.02
-0.03
-0.04
-0.05
-1
10
20
-15
10
200
Differential Gain/Phase vs DC Input
Voltage at 3.58MHz
0.02
dG (%) or dP (°)
10
Frequency (MHz)
dG (%) or dP (°)
0.03
8
Two-tone 3rd Order
Input Referred Intermodulation Intercept (IIP3)
-10
1
6
25
Input Power Intercept (dBm)
Harmonic Distortion (dBc)
-30
4
Supply Voltage (V)
2nd and 3rd Harmonic Distortion vs Frequency
-20
2
-0.5
0
0.5
-0.04
-1
1
DC Input Voltage
-0.5
0
DC Input Voltage
5
0.5
1
EL5196C - Preliminary
EL5196C - Preliminary
Single 400MHz 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=500Ω
8
Output Voltage Swing (VPP)
Output Voltage Swing (VPP)
8
RL=150Ω
6
4
2
RL=150Ω
6
4
2
AV=2
0
1
AV=2
10
Frequency (MHz)
100
0
200
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
375
AV=2
RL=150Ω
VSTEP=5VP-P output
20
350
325
15
RoI (kΩ)
Settling Time (ns)
EL5196C - Preliminary
EL5196C - Preliminary
10
300
275
250
5
0
0.01
225
0.1
200
-40
1
Settling Accuracy (%)
10
60
Die Temperature (°C)
6
110
160
Single 400MHz Fixed Gain Amplifier
Typical Performance Curves
6
Frequency Response (Gain)
SO8 Package
90
Frequency Response (Phase)
SO8 Package
2
0
AV=1
-2
Phase (°)
Normalized Magnitude (dB)
AV=2, -1
-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
2.5
ICMR/IPSR (µA/V)
CMRR
50
ICMR+
2
PSRR
70
PSRR/CMRR (dB)
100M
Frequency (Hz)
30
1.5
IPSR
1
0.5
ICMR-
0
-0.5
10
-40
10
60
110
-1
-40
160
10
Die Temperature (°C)
60
110
160
110
160
Die Temperature (°C)
Offset Voltage vs Temperature
Input Current vs Temperature
2
140
120
100
VOS (mV)
Input Current (µA)
1
0
80
60
IB+
40
20
IB-
0
-1
-40
10
60
110
-20
-40
160
Die Temperature (°C)
10
60
Die Temperature (°C)
7
EL5196C - Preliminary
EL5196C - Preliminary
Single 400MHz Fixed Gain Amplifier
Typical Performance Curves
Positive Input Resistance vs Temperature
Supply Current vs Temperature
35
10
30
Supply Current (mA)
RIN (kΩ)
25
20
15
10
9
5
0
-40
10
60
110
8
-40
160
10
60
Positive Output Swing vs Temperature for Various Loads
160
Negative Output Swing vs Temperature for Various Loads
4.2
-3.5
4.1
150Ω
-3.6
1kΩ
4
-3.7
3.9
VOUT (V)
VOUT (V)
110
Die Temperature (°C)
Die Temperature (°C)
3.8
3.7
-3.8
-3.9
1kΩ
-4
150Ω
-4.1
3.6
3.5
-40
10
60
110
-4.2
-40
160
10
110
160
Slew Rate vs Temperature
Output Current vs Temperature
5000
140
Sink
AV=2
RF=RG=250Ω
RL=150Ω
4500
Slew Rate (V/µS)
135
60
Die Temperature (°C)
Die Temperature (°C)
IOUT (mA)
EL5196C - Preliminary
EL5196C - Preliminary
130
125
Source
4000
3500
120
115
-40
10
60
110
3000
-40
160
10
60
Die Temperature (°C)
Die Temperature (°C)
8
110
160
Single 400MHz Fixed Gain Amplifier
Typical Performance Curves
0.7
Package Power Dissipation vs Ambient Temp.
JEDEC JESD51-3 Low Effective Thermal Conductivity Test Board
625mW
0
16
0.5
/W
°C
391mW
0.4
8
SO
Power Dissipation (W)
0.6
SO
T2
35
25
L
6 °C
/W
0.3
0.2
0.1
0
0
25
50
75
100
125
150
Ambient Temperature (°C)
9
EL5196C - Preliminary
EL5196C - Preliminary
EL5196C - Preliminary
EL5196C - Preliminary
Single 400MHz Fixed Gain Amplifier
Pin Descriptions
EL5196C
8-Pin SO
EL5196C
5-Pin
SOT23
1, 5
2
4
Pin Name
Function
NC
Not connected
IN-
Inverting input
Equivalent Circuit
RG
IN+
IN-
RF
Circuit1
3
3
IN+
Non-inverting input
4
6
2
VS-
Negative supply
1
OUT
Output
(See circuit 1)
OUT
RF
Circuit 2
7
8
5
VS+
Positive supply
NC
Not connected (leave this pin disconnected)
10
Single 400MHz 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 EL5196C is a current-feedback operational amplifier that offers a wide -3dB bandwidth of 600MHz and a
low supply current of 6mA per amplifier. The EL5196C
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 EL5196C 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
EL5196C 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 EL5193C
with 300MHz on a 4mA 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 EL5196C has been optimized with a 375Ω 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 EL5196C has been designed and specified at a gain
of +2 with RF approximately 375Ω. This value of feedback resistor gives 300MHz of -3dB bandwidth at A V=2
with 2dB of peaking. With AV=-2, an RF of 375Ω gives
275MHz of bandwidth with 1dB of peaking. Since the
EL5196C 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 EL5196C is a current-feedback amplifier,
its gain-bandwidth product is not a constant for different
closed-loop gains. This feature actually allows the
EL5196C to maintain about the same -3dB bandwidth.
As gain is increased, bandwidth decreases slightly while
stability increases. Since the loop stability is improving
11
EL5196C - Preliminary
EL5196C - Preliminary
EL5196C - Preliminary
EL5196C - Preliminary
Single 400MHz Fixed Gain Amplifier
with higher closed-loop gains, it becomes possible to
reduce the value of RF below the specified 375Ω and
still retain stability, resulting in only a slight loss of
bandwidth with increased closed-loop gain.
EL5196C has dG and dP specifications of 0.03% and
0.05°, respectively.
Output Drive Capability
In spite of its low 6mA of supply current, the EL5196C
is capable of providing a minimum of ±120mA of output
current. With a minimum of ±120mA of output drive,
the EL5196C 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 EL5196C 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 EL5196C
will operate on dual supplies ranging from ±2.5V to
±5V. With single-supply, the EL5196C will operate
from 5V to 10V.
Driving Cables and Capacitive Loads
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 EL5196C 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.
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
EL5196C has an input range which extends to within 2V
of either supply. So, for example, on ±5V supplies, the
EL5196C has an input range which spans ±3V. The output range of the EL5196C 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.
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 6mA supply current of each EL5196C
amplifier. Special circuitry has been incorporated in the
EL5196C to reduce the variation of output impedance
with current output. This results in dG and dP specifications of 0.015% and 0.04°, while driving 150Ω at a gain
of 2.
The EL5196C 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 EL5196C, 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 EL5196C to
Video performance has also been measured with a 500Ω
load at a gain of +1. Under these conditions, the
12
Single 400MHz 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
EL5196C - Preliminary
EL5196C - Preliminary
EL5196C - Preliminary
EL5196C - Preliminary
Single 400MHz 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
14
Printed in U.S.A.
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