Elantec EL5191CW-T13 1ghz current feedback amplifier Datasheet

EL5191C
EL5191C
1GHz Current Feedback Amplifier
Features
General Description
• 1GHz -3dB bandwidth
• 9mA supply current
• Single and dual supply operation,
from 5V to 10V supply span
• Available in 5-pin SOT23 package
• High speed, 600MHz product
available (EL5192C, EL5292C,
and EL5392C)
• Lower power, 300MHz product
available (EL5193C, EL5293C,
EL5393C)
The EL5191C amplifier is of the current feedback variety and exhibits
a very high bandwidth of 1GHz. This makes this amplifier ideal for
today’s high speed video and monitor applications, as well as a number of RF and IF frequency designs.
With a supply current of just 9mA and the ability to run from a single
supply voltage from 5V to 10V, these amplifiers offer very high performance for little power consumption.
For applications where board space is critical, the EL5191C is offered
in the 5-pin SOT23 package, as well as an industry standard 8-pin SO.
The EL5191C 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
Pin Configurations
8-Pin SO
Ordering Information
5-Pin SOT23
NC 1
OUT 1
5-Pin SOT23
7”
EL5191CW-T13
5-Pin SOT23
13”
MDP0038
8-Pin SO
-
MDP0027
Part No
EL5191CS
Outline #
MDP0038
EL5191CS-T7
8-Pin SO
7”
MDP0027
EL5191CS-T13
8-Pin SO
13”
MDP0027
IN- 2
VS- 2
+
EL5191CW-T7
8
NC*
7
VS+
6
OUT
5
NC
5 VS+
-
Package
Tape &
Reel
IN+ 3
IN+ 3
+
4 INV S- 4
EL5191CW
EL5191CS
* This pin must be left disconnected
April 12, 2001
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.
EL5191C
EL5191C
1GHz Current Feedback 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.
11V
Supply Voltage between VS+ and VSMaximum Continuous Output Current
50mA
Operating Junction Temperature
Power Dissipation
Pin Voltages
Storage Temperature
Operating Temperature
125°C
See Curves
VS- - 0.5V to VS+ +0.5V
-65°C to +150°C
-40°C to +85°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, RF = 392Ω for AV = 1, RF = 250Ω for AV = 2, RL = 150Ω, TA = 25°C unless otherwise specified.
Parameter
Description
Conditions
Min
Typ
Max
Unit
AC Performance
BW
-3dB Bandwidth
AV = +1
1000
MHz
AV = +2
600
MHz
30
MHz
2800
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
7
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
ROL
Transimpedance
-15
Measured from TMIN to TMAX
1
15
mV
5
µV/°C
150
300
kΩ
Input Characteristics
CMIR
Common Mode Input Range
±3
±3.3
V
CMRR
Common Mode Rejection Ratio
42
50
dB
-ICMR
- Input Current Common Mode Rejection
6
µA/V
+IIN
+ Input Current
-120
40
120
µA
-IIN
- Input Current
-40
5
40
µA
RIN
Input Resistance
27
kΩ
CIN
Input Capacitance
0.5
pF
V
-6
Output Characteristics
VO
IOUT
Output Voltage Swing
RL = 150Ω to GND
±3.4
±3.7
RL = 1KΩ to GND
±3.8
±4.0
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
Typical Performance Curves
Non-Inverting Frequency Response (Phase)
Non-Inverting Frequency Response (Gain)
SOT23 Package
6
90
AV=2
2
0
-2
-90
AV=1
AV=2
Phase (°)
Normalized Magnitude (dB)
AV=1
AV=5
-6
AV=5
-180
AV=10
AV=10
-10
-270
RF=390Ω
RL=150Ω
-14
1M
10M
100M
RF=390Ω
RL=150Ω
-360
1M
1G
10M
Inverting Frequency Response (Gain)
SOT23 Package
90
AV=-1
2
-2
AV=-2
-6
AV=-5
0
Phase (°)
Normalized Magnitude (dB)
1G
Inverting Frequency Response (Phase)
6
-10
AV=-1
-90
AV=-2
AV=-5
-180
-270
RF=250Ω
RL=150Ω
-14
1M
RF=250Ω
RL=150Ω
10M
100M
-360
1M
1G
10M
Frequency (Hz)
6
2pF added
RL=100Ω
Normalized Magnitude (dB)
6
1pF added
2
-2
-10
1M
1G
Frequency Response for Various RL
10
-6
100M
Frequency (Hz)
Frequency Response for Various CIN-
Normalized Magnitude (dB)
100M
Frequency (Hz)
Frequency (Hz)
0pF added
AV=2
RF=250Ω
RL=150Ω
2
RL=150Ω
RL=500Ω
-2
-6
-10
AV=2
RF=250Ω
100M
10M
-14
1M
1G
10M
100M
Frequency (Hz)
Frequency (Hz)
3
1G
EL5191C
EL5191C
1GHz Current Feedback Amplifier
1GHz Current Feedback Amplifier
Typical Performance Curves
Frequency Response for Various CL
Frequency Response for Various RF
14
6
10
2
Normalized Magnitude (dB)
Normalized Magnitude (dB)
150Ω
6pF added
6
4pF added
2
AV=2
RF=250Ω
RL=150Ω
-2
-6
1M
0pF added
10M
100M
250Ω
-2
375Ω
-6
500Ω
AV=2
RG=RF
RL=150Ω
-10
-14
1M
1G
10M
Frequency (Hz)
100M
1G
Frequency (Hz)
Group Delay vs Frequency
Frequency Response for Various Common-mode
Input Voltages
3.5
6
VCM=3V
VCM=0V
Normalized Magnitude (dB)
3
Group Delay (ns)
2.5
AV=2
RF=250Ω
2
AV=1
RF=390Ω
1.5
1
2
-2
VCM=-3V
-6
AV=2
RF=250Ω
RL=150Ω
-10
0.5
0
1M
10M
100M
-14
1M
1G
10M
Frequency (Hz)
100M
1G
Frequency (Hz)
Transimpedance (ROL) vs Frequency
PSRR and CMRR vs Frequency
10M
20
0
Phase
1M
0
-180
10k
Phase (°)
100k
PSRR/CMRR (dB)
-90
Magnitude (Ω)
EL5191C
EL5191C
-270
Gain
1k
PSRR+
-20
PSRR-40
-60
CMRR
-360
100
1k
10k
100k
1M
10M
Frequency (Hz)
100M
-80
10k
1G
4
100k
1M
10M
Frequency (Hz)
100M
1G
Typical Performance Curves
-3dB Bandwidth vs Supply Voltage for Inverting
Gains
-3dB Bandwidth vs Supply Voltage for Noninverting Gains
1200
600
RF=390Ω
RL=150Ω
1000
500
AV=-1
AV=-2
-3dB Bandwidth (MHz)
-3dB Bandwidth (MHz)
AV=1
800
600
AV=2
400
AV=10
AV=5
200
400
300
AV=-5
200
100
0
RF=250Ω
RL=150Ω
0
5
6
7
8
5
10
9
6
Peaking vs Supply Voltage for Non-inverting Gains
8
10
4
AV=1
3
3
Peaking (dB)
2.5
2
1.5
1
AV=2
RF=390Ω
RL=150Ω
AV=-1
2
AV=-2
AV=-5
1
RF=250Ω
RL=150Ω
0.5
AV=10
0
0
5
6
7
8
9
5
10
6
Total Supply Voltage (V)
7
8
9
10
Total Supply Voltage (V)
Non-inverting Frequency Response (Gain)
SO8 Package
Non-inverting Frequency Response (Phase)
SO8 Package
6
90
AV=1
AV=1
2
AV=2
-2
-6
AV=5
-10
AV=10
AV=2
0
Phase (°)
Normalized Magnitude (dB)
9
Peaking vs Supply Voltage for Inverting Gains
4
3.5
Peaking (dB)
7
Total Supply Voltage (V)
Total Supply Voltage (V)
-90
AV=5
-180
AV=10
-14
1M
RF=392Ω
RL=150Ω
10M
100M
-270
-360
1M
1G 1.6G
RF=392Ω
RL=150Ω
10M
100M
Frequency (Hz)
Frequency (Hz)
5
1G
EL5191C
EL5191C
1GHz Current Feedback Amplifier
1GHz Current Feedback Amplifier
Typical Performance Curves
Inverting Frequency Response (Gain)
SO8 Package
Inverting Frequency Response (Phase)
SO8 Package
6
90
AV=-2
AV=-1
2
-2
AV=-5
-6
-10
-90
AV=-5
-180
-270
RF=250Ω
RL=150Ω
-14
1M
10M
100M
RF=250Ω
RL=150Ω
-360
1M
1G
10M
Frequency (Hz)
100M
1G
Frequency (Hz)
-3dB Bandwidth vs Temperature for Non-inverting
Gains
-3dB Bandwidth vs Temperature for Inverting
Gains
2000
700
RF=250Ω
RL=150Ω
600
-3dB Bandwidth (MHz)
1500
-3dB Bandwidth (MHz)
AV=-2
0
Phase (°)
Normalized Magnitude (dB)
AV=-1
AV=1
1000
AV=2
AV=5
500
AV=10
AV=-1
500
AV=-2
400
AV=-5
300
200
RF=250Ω
RL=150Ω
100
0
-40
10
60
110
0
-40
160
10
Ambient Temperature (°C)
60
110
160
Ambient Temperature (°C)
Peaking vs Temperature
Voltage and Current Noise vs Frequency
3
1000
RL=150Ω
Voltage Noise (nV/√Hz)
, Current Noise (pA/√Hz)
2.5
AV=1
2
Peaking (dB)
EL5191C
EL5191C
1.5
1
AV=-1
0.5
0
-40
in+
100
in-
10
en
AV=-2
10
60
110
1
100
160
Ambient Temperature (°C)
6
1000
10k
100k
Frequency ()
1M
10M
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
0.01
6
4
2
0.001
100
0
10k
1k
1M
100k
Frequency (Hz)
10M
100M
1G
0
2nd and 3rd Harmonic Distortion vs Frequency
6
8
Supply Voltage (V)
10
12
30
AV=+2
VOUT=2VP-P
RL=100Ω
-30
25
Input Power Intercept (dBm)
-20
Harmonic Distortion (dBc)
4
Two-tone 3rd Order
Input Referred Intermodulation Intercept (IIP3)
-10
-40
2nd Order
Distortion
-50
-60
-70
3rd Order
Distortion
-80
-90
20
15
10
5
0
-5
AV=+2
RL=100Ω
-10
-100
1
10
Frequency (MHz)
100
-15
10
200
100
200
Frequency (MHz)
Differential Gain/Phase vs DC Input
Voltage at 3.58MHz
Differential Gain/Phase vs DC Input
Voltage at 3.58MHz
0.03
0.03
AV=2
RF=RG=250Ω
RL=150Ω
0.01
dP
AV=1
RF=375Ω
RL=500Ω
0.02
dP
0.01
dG (%) or dP (°)
dG (%) or dP (°)
2
dG
-0.01
0
dG
-0.01
-0.02
-0.03
-0.03
-0.04
-0.05
-1
-0.5
0
0.5
1
-1
DC Input Voltage
-0.5
0
DC Input Voltage
7
0.5
1
EL5191C
EL5191C
1GHz Current Feedback Amplifier
1GHz Current Feedback Amplifier
Typical Performance Curves
Output Voltage Swing vs Frequency
THD<1%
Output Voltage Swing vs Frequency
THD<0.1%
10
10
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
AV=2
0
0
1
10
Frequency (MHz)
100
1
200
Small Signal Step Response
10
Frequency (MHz)
100
Large Signal Step Response
VS=±5V
RL=150Ω
AV=2
RF=RG=250Ω
VS=±5V
RL=150Ω
AV=2
RF=RG=250Ω
200mV/div
1V/div
10ns/div
10ns/div
Settling Time vs Settling Accuracy
Transimpedance (RoI) vs Temperature
25
375
AV=2
RF=RG=250Ω
RL=150Ω
VSTEP=5VP-P output
20
350
325
15
RoI (kΩ)
Settling Time (ns)
EL5191C
EL5191C
10
300
275
250
5
225
0
0.01
0.1
200
-40
1
Settling Accuracy (%)
10
60
Die Temperature (°C)
8
110
160
Typical Performance Curves
PSRR and CMRR vs Temperature
ICMR and IPSR vs Temperature
90
2.5
70
1.5
ICMR/IPSR (µ A/V)
PSRR/CMRR (dB)
ICMR+
2
PSRR
CMRR
50
30
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
110
160
Die Temperature (°C)
Offset Voltage vs Temperature
Input Current vs Temperature
2
140
120
100
VOS (mV)
Input Current (µ A)
1
0
80
60
IB+
40
20
IB0
-1
-40
10
60
110
-20
-40
160
10
Die Temperature (°C)
60
Temperature (°C)
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
Temperature (°C)
10
60
Temperature (°C)
9
EL5191C
EL5191C
1GHz Current Feedback Amplifier
1GHz Current Feedback Amplifier
Typical Performance Curves
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
4
-3.7
3.9
-3.8
VOUT (V)
VOUT (V)
1kΩ
3.8
3.7
-3.9
1kΩ
-4
150Ω
-4.1
3.6
3.5
-40
10
60
110
-4.2
-40
160
10
60
Output Current vs Temperature
160
Slew Rate vs Temperature
140
5000
AV=2
RF=RG=250Ω
RL=150Ω
Sink
135
4500
Slew Rate (V/µ S)
IOUT (mA)
110
Temperature (°C)
Temperature (°C)
130
125
Source
115
-40
4000
3500
120
10
60
110
3000
-40
160
10
60
Die Temperature (°C)
110
160
Die Temperature (°C)
Maximum Power Dissipation vs Ambient
Temperature
Package Power Dissipation vs Ambient Temp.
JEDEC JESD51-3 Low Effective Thermal Conductivity Test Board
1.4
0.7
625mW
TJMAX=150°C
1.2
0.8
SOT23
0.6
0.4
0.2
0
-50
0.5
391mW
0.4
/W
Power Dissipation (W)
SO8
C
0°
16
1
0.6
8
SO
Power Dissipation (W)
EL5191C
EL5191C
SO
T2
35
256
L
°C
/W
0.3
0.2
0.1
0
0
50
100
0
Ambient Temperature (°C)
25
50
75
100
Ambient Temperature (°C)
10
125
150
Pin Descriptions
EL5191C
8-Pin SO
EL5191C
5-Pin SOT23
1,5
2
4
Pin Name
Function
NC
Not connected
IN-
Inverting input
Equivalent Circuit
VS+
IN+
IN-
VSCircuit1
3
3
IN+
Non-inverting input
4
2
VS -
Negative supply
6
1
OUT
Output
(See circuit 1)
VS+
OUT
VSCircuit 2
7
8
5
VS +
Positive supply
NC
Not connected (leave this pin disconnected)
11
EL5191C
EL5191C
1GHz Current Feedback Amplifier
EL5191C
EL5191C
1GHz Current Feedback 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 EL5191C is a current-feedback operational amplifier that offers a wide -3dB bandwidth of 1GHz and a
low supply current of 9mA per amplifier. The EL5191C
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 EL5191C 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
EL5191C 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 EL5192C
with 600MHz on a 6mA 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 EL5191C has been optimized with a 250Ω 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 EL5191C has been designed and specified at a gain
of +2 with RF approximately 250Ω. This value of feedback resistor gives 600MHz of -3dB bandwidth at AV=2
with about 2dB of peaking. With AV=-2, that same RF
gives 450MHz of bandwidth with 0.6dB of peaking.
Since the EL5191C 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 EL5191C is a current-feedback amplifier,
its gain-bandwidth product is not a constant for different
closed-loop gains. This feature actually allows the
EL5191C to maintain about the same -3dB bandwidth.
As gain is increased, bandwidth decreases slightly while
12
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 250Ω and
still retain stability, resulting in only a slight loss of
bandwidth with increased closed-loop gain.
Video performance has also been measured with a 500Ω
load at a gain of +1. Under these conditions, the
EL5191C has dG and dP specifications of 0.02% and
0.02°, respectively.
Output Drive Capability
Supply Voltage Range and Single-Supply
Operation
In spite of its low 9mA of supply current, the EL5191C
is capable of providing a minimum of ±95mA of output
current. With a minimum of ±95mA of output drive, the
EL5191C is capable of driving 50Ω loads to both rails,
making it an excellent choice for driving isolation transformers in telecommunications applications.
The EL5191C 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 EL5191C
will operate on dual supplies ranging from ±2.5V to
±5V. With single-supply, the EL5191C 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 EL5191C 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
EL5191C has an input range which extends to within 2V
of either supply. So, for example, on ±5V supplies, the
EL5191C has an input range which spans ±3V. The output range of the EL5191C 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
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 9mA supply current of each EL5191C
amplifier. Special circuitry has been incorporated in the
EL5191C to reduce the variation of output impedance
with current output. This results in dG and dP specifications of 0.035% and 0.04°, while driving 150Ω at a gain
of 2.
Current Limiting
The EL5191C 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 EL5191C, it
is possible to exceed the 125°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 EL5191C to
13
EL5191C
EL5191C
1GHz Current Feedback Amplifier
EL5191C
EL5191C
1GHz Current Feedback Amplifier
remain in the safe operating area. These parameters are
calculated as follows:
T JMA X = T MA X + ( θ JA × n × PD MA X )
where:
70$; 0D[LPXP$PELHQW7HPSHUDWXUH
θ-$ 7KHUPDO5HVLVWDQFHRIWKH3DFNDJH
Q 1XPEHURI$PSOLILHUVLQWKH3DFNDJH
3'0$; 0D[LPXP3RZHU'LVVLSDWLRQRI(DFK
$PSOLILHULQWKH3DFNDJH
PDMAX for each amplifier can be calculated as follows:
V OU T MAX
PD MA X = ( 2 × V S × I SMA X ) + ( V S – V OU T MAX ) × ---------------------------RL
where:
96 6XSSO\9ROWDJH
,60$; 0D[LPXP6XSSO\&XUUHQWRI$
92870$; 0D[LPXP2XWSXW9ROWDJH 5HTXLUHG
5/ /RDG5HVLVWDQFH
14
Typical Application Circuits
Inverting 200mA Output Current Distribution Amplifier
0.1µ F
+5V
IN+
VS+
OUT
INVS0.1µ F
-5V
250Ω
5Ω
0.1µ F
VOUT
+5V
IN+
VS+
5Ω
OUT
INVS0.1µ F
-5V
250Ω
250Ω
VIN
Fast-Settling Precision Amplifier
250Ω
250Ω
0.1µ F
+5V
IN+
VS+
OUT
INVS0.1µ F
250Ω
-5V
250Ω
+5V
0.1µ F
VIN
IN+
VS+
OUT
INVS0.1µ F
-5V
15
VOUT
EL5191C
EL5191C
1GHz Current Feedback Amplifier
EL5191C
EL5191C
1GHz Current Feedback Amplifier
Typical Application Circuits
Differential Line Driver/Receiver
0.1µ F
0.1µ F
+5V
IN+
+5V
IN+
VS+
VS+
OUT
OUT
IN-
INVS-
VS0.1µ F
0.1µ F
-5V
-5V
250Ω
0.1µ F
120Ω
250Ω
250Ω
VOUT+
0.1µ F
1kΩ
+5V
IN+
240Ω
0.1µ F
+5V
VS+
OUT
IN-
0.1µ F
120Ω
IN+
VOUT-
VS-
VS+
OUT
1kΩ
IN-
0.1µ F
VS-
-5V
250Ω
0.1µ F
-5V
250Ω
VIN
250Ω
Transmitter
250Ω
Receiver
16
VOUT
EL5191C
EL5191C
1GHz 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.
April 12, 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
17
Printed in U.S.A.
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