Datasheet EL5397CU-T13, EL5397CU, EL5397CS-T7, EL5397CS-T13, EL5397CS Datasheet (ELANT)

EL5397C - Preliminary

Triple 200MHz Fixed Gain Amplifier

EL5397C - Preliminary

Features

• 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)

Applications

• Battery-powered Equipment

• Hand-held, Portable Devices

• Video Amplifiers

• Cable Drivers

• RGB Amplifiers

• Test Equipment

• Instrumentation

• Current to Voltage Converters

Ordering Information

Part No Package

EL5397CS 16-Pin SO - MDP0027

EL5397CS-T7 16-Pin SO 7” MDP0027

EL5397CS-T13 16-Pin SO 13” MDP0027

EL5397CU 16-Pin QSOP - MDP0040

EL5397CU-T13 16-Pin QSOP 13” MDP0040

Tape &

Reel Outline #

General Description

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.

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

16-Pin SO & QSOP

INA+

NC*

VS-

NC*

INB+

1

2

-

+

3

+

4

-

5

16

INA-

15

OUTA

14

VS+

13

OUTB

12

INB-

6

NC

+

7

NC*

INC+

* 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.

-

8 9

EL5397CS, EL5397CU

11

NC

10

OUTC

INC-

September 19, 2001

EL5397C - Preliminary

Triple 200MHz Fixed Gain Amplifier

Absolute Maximum Ratings (T

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 VS- 11V

EL5397C - Preliminary

Maximum Continuous Output Current 50mA

Operating Junction Temperature 125°C

= 25°C)

A

Power Dissipation See Curves

Pin Voltages VS- - 0.5V to VS+ +0.5V

Storage Temperature -65°C to +150°C

Operating Temperature -40°C to +85°C

Lead Temperature 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, R

Parameter Description Conditions Min Typ Max Unit

AC Performance

BW -3dB Bandwidth AV = +1 200 MHz

BW1 0.1dB Bandwidth 20 MHz

SR Slew Rate VO = -2.5V to +2.5V, AV = [phone] V/µs

ts 0.1% Settling Time V

C

S

e

n

i

- IN- input current noise 17 pA/√Hz

n

i

+ IN+ input current noise 50 pA/√Hz

n

dG Differential Gain Error

dP Differential Phase Error

DC Performance

V

OS

TCV

OS

A

E

RF, R

G

Input Characteristics

CMIR Common Mode Input Range ±3V ±3.3V V

+I

IN

-I

IN

R

IN

C

IN

Output Characteristics

V

O

I

OUT

Supply

Is

ON

PSRR Power Supply Rejection Ratio DC, VS = ±4.75V to ±5.25V 55 75 dB

-IPSR - Input Current Power Supply Rejection DC, VS = ±4.75V to ±5.25V -2 2 µA/V

1. Standard NTSC test, AC signal amplitude = 286mV

= 150Ω, T

L

= 25°C unless otherwise specified.

A

AV = +2 200 MHz

= -2.5V to +2.5V, AV = -1 12 ns

OUT

Channel Separation f = 5MHz 67 dB
Input Voltage Noise 4.8 nV/√Hz

[1]

[1]

AV = +2 0.03 %

AV = +2 0.04 °

Offset Voltage -10 1 10 mV

Input Offset Voltage Temperature Coefficient Measured from T

MIN

to T

MAX

5 µV/°C

Gain Error VO = -3V to +3V -2 2 %

Internal RF and R

G

320 400 480 Ω

+ Input Current -60 1 60 µA

- Input Current -30 1 30 µA
Input Resistance 45 kΩ

Input Capacitance 0.5 pF

Output Voltage Swing R

Output Current R

Supply Current No Load, V

p-p

L

R

L

L

, f = 3.58MHz

= 150Ω to GND ±3.4V ±3.7V V
= 1KΩ to GND ±3.8V ±4.0V V
= 10Ω to GND 95 120 mA

= 0V 3 4 5 mA

IN

2

Typical Performance Curves

EL5397C - Preliminary

EL5397C - Preliminary

Triple 200MHz Fixed Gain Amplifier

Frequency Response (Gain)

6

AV=-1

2

-2

-6

Normalized Magnitude (dB)

-10
RL=150Ω

-14

1M 10M 100M 1G

Frequency Response for Various C

14

AV=2
RL=150Ω

10

6

2

Normalized Magnitude (dB)

-2

-6
1M 10M 100M 1G

AV=1

Frequency (Hz)

L

22pF added

10pF added

0pF added

Frequency (Hz)

AV=2

Frequency Response (Phase), All Gains

90

0

-90

Phase (°)

-180

-270
RL=150Ω

-360

1M 10M 100M 1G

Frequency (Hz)

Group Delay vs Frequency

3.5

3

2.5

2

1.5

Delay (ns)

1

0.5

RL=150Ω

0

1M 10M 100M 1G

AV=2

AV=1

Frequency (Hz)

Frequency Response for Various Common-mode Input
Voltages

6

2

-2

-6

Normalized Magnitude (dB)

-10
AV=2

RL=150Ω

-14

1M 10M 100M 1G

3V

Frequency (Hz)

-3V

Transimpedance (ROL) vs Frequency

10M

0V

1M

100k

10k

Magnitude (Ω)

1k

100

1k

10k 100k 1M 10M 100 1G

Phase

Gain

Frequency (Hz)

0

-90

-180
Phase (°)

-270

-360

3

EL5397C - Preliminary

Triple 200MHz Fixed Gain Amplifier

Typical Performance Curves

EL5397C - Preliminary

PSRR and CMRR vs Frequency

20

0

-20

-40

PSRR/CMRR (dB)

-60

-80
10k 100k 1M 10M 1G100M

Peaking vs Supply Voltage

5

4

AV=-1

3

AV=2

2

Peaking (dB)

1

RL=150Ω

0

5 6 8 107 9

PSRR-

Frequency (Hz)

AV=1

Total Supply Voltage (V)

PSRR+

CMRR

-3dB Bandwidth vs Supply Voltage

250

RL=150Ω

200

AV=2

150

-3dB Bandwidth (MHz)

-3dB Bandwidth (MHz)

AV=-1 AV=1

100

5 6 8 10

-3dB Bandwidth vs Temperature

300

250

200

150

100

50

RL=150Ω

0

-40 10 60 160

7 9

Total Supply Voltage (V)

110

Ambient Temperature (°C)

Peaking vs Temperature

1

0.8

0.6

0.4

Peaking (dB)

0.2

RL=150Ω

0

-40 10 60 160110
Ambient Temperature (°C)

Voltage and Current Noise vs Frequency

1000

100

10

Voltage Noise (nV/√Hz)

, Current Noise (pA/√Hz)

1
100

in+

in-

e

n

1000 10k 100k 10M1M

Frequency (Hz)

4

Typical Performance Curves

EL5397C - Preliminary

EL5397C - Preliminary

Triple 200MHz Fixed Gain Amplifier

Closed Loop Output Impedance vs Frequency

100

10

1

0.1

Output Impedance (Ω)

0.01

0.001
100 10k 100M 1G1M

1k 100k 10M

2nd and 3rd Harmonic Distortion vs Frequency

-20
AV=+2

-30

V

=2V

OUT

RL=100Ω

-40

-50

-60

-70

Harmonic Distortion (dBc)

-80

-90

1

P-P

Frequency (Hz)

2nd Order
Distortion

Frequency (MHz)

3rd Order
Distortion

10 100

Supply Current vs Supply Voltage

10

8

6

4

Supply Current (mA)

2

0

0

Two-tone 3rd Order
Input Referred Intermodulation Intercept (IIP3)

25

AV=+2

20

RL=150Ω

15

10

5

0

Input Power Intercept (dBm)

-10

-5

10

AV=+2
RL=100Ω

Supply Voltage (V)

Frequency (MHz)

122 10864

100

Differential Gain/Phase vs DC Input
Voltage at 3.58MHz

0.03
AV=2

0.02

RF=RG=500Ω
RL=150Ω

0.01

0

-0.01

-0.02

dG (%) or dP (°)

-0.03

-0.04

-0.05

-1 -0.5 0 0.5 1
DC Input Voltage

dP

dG

Differential Gain/Phase vs DC Input
Voltage at 3.58MHz

0.04
AV=1

0.03

RF=750Ω
RL=500Ω

0.02

0.01

0

-0.01

dG (%) or dP (°)

-0.02

-0.03

-0.04

-1 -0.5 0 0.5 1
DC Input Voltage

dP

dG

5

EL5397C - Preliminary

Triple 200MHz Fixed Gain Amplifier

Typical Performance Curves

EL5397C - Preliminary

)

PP

Output Voltage Swing (V

200mV/div

Output Voltage Swing vs Frequency
THD<1%

10

RL=500Ω

8

RL=150Ω

6

4

2

AV=2

0

1

Small Signal Step Response

Frequency (MHz)

10 100

VS=±5V
RL=150Ω
AV=2

Output Voltage Swing vs Frequency
THD<0.1%

10

)

8

PP

Output Voltage Swing (V

1V/div

RL=500Ω

6

RL=150Ω

4

2

AV=2

0

1

Large Signal Step Response

10 100

Frequency (MHz)

VS=±5V
RL=150Ω
AV=2

10ns/div

Settling Time vs Settling Accuracy

25

20

15

10

Settling Time (ns)

5

0

0.01 0.1 1
Settling Accuracy (%)

AV=2
RL=150Ω
V

STEP

=5V

P-P

output

10ns/div

Transimpedance (RoI) vs Temperature

625

600

575

RoI (kΩ)

550

525

-40 10 60 110 160
Die Temperature (°C)

6

Typical Performance Curves

EL5397C - Preliminary

EL5397C - Preliminary

Triple 200MHz Fixed Gain Amplifier

Frequency Response (Gain)
SO8 Package

6

2

-2

-6

Normalized Magnitude (dB)

-10
RL=150Ω

-14

1M 10M 100M 1G

PSRR and CMRR vs Temperature

90
80
70
60
50
40

PSRR/CMRR (dB)

30
20
10

-40 10 60 110 160

AV=1

Frequency (Hz)

PSRR

CMRR

Die Temperature (°C)

Frequency Response (Phase)
SO8 Package

90

AV=2AV=-1

0

-90

Phase (°)

-180

-270
RL=150Ω

-360

1M 10M 100M 1G

Frequency (Hz)

ICMR and IPSR vs Temperature

2

1.5

1

0.5

ICMR/IPSR (µA/V)

0

-0.5

-40 10 60 110 160

ICMR+

IPSR

ICMR-

Die Temperature (°C)

Offset Voltage vs Temperature

2

1

0

(mV)

OS

V

-1

-2

-40 10 60 110 160
Die Temperature (°C)

Input Current vs Temperature

60

40

20

0

-20

Input Current (µA)

-40

-60

-40 10 110 160

60

Die Temperature (°C)

IB-

IB+

7

EL5397C - Preliminary

Triple 200MHz Fixed Gain Amplifier

Typical Performance Curves

EL5397C - Preliminary

Positive Input Resistance vs Temperature

60

50

40

30

+ (kΩ)

IN

R

20

10

0

-40 10 110 160

Positive Output Swing vs Temperature for Various Loads

4.2

4.1

4

3.9

(V)

OUT

3.8

V

3.7

3.6

3.5

-40 10 110 160

130

1kΩ

150Ω

Output Current vs Temperature

60

Die Temperature (°C)

60

Die Temperature (°C)

Supply Current vs Temperature

5

4

3

2

Supply Current (mA)

1

0

-40 10 110 160

Negative Output Swing vs Temperature for Various Loads

-3.5

-3.6

-3.7

-3.8

(V)

OUT

-3.9

V

-4

-4.1

-4.2

-40 10 110 160

Slew Rate vs Temperature

4000

60

Die Temperature (°C)

150Ω

1kΩ

60

Die Temperature (°C)

125

(mA)

OUT

I

120

115

-40 10 60 110 160

Sink

Source

Die Temperature (°C)

3500

3000

Slew Rate (V/µS)

2500

-40 10 60 110 160
Die Temperature (°C)

AV=2
RF=RG=500Ω
RL=150Ω

8

Typical Performance Curves

Package Power Dissipation vs Ambient Temp.

JEDEC JESD51-3 Low Effective Thermal Conductivity Test Board

1

0.9
909mW

0.8

0.7

0.6

633mW

0.5

0.4

0.3

Power Dissipation (W)

0.2

0.1

0

0 50 100 150

S

O

1

1

6

1

0

°

C

/

W

Q

S

O

P

1

1

6

5

8

°

C

/

W

25 75 125

Ambient Temperature (°C)

EL5397C - Preliminary

EL5397C - Preliminary

Triple 200MHz Fixed Gain Amplifier

9

EL5397C - Preliminary

Triple 200MHz Fixed Gain Amplifier

Pin Descriptions

EL5396C

16-Pin SO & 16-

Pin QSOP Pin Name Function Equivalent Circuit

EL5397C - Preliminary

1 INA+ Non-inverting input, Channel A

2 CEA Amplifier A enable

CE

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

Circuit1

Circuit 2

R

G

R

F

IN-IN+

11 NC Not connected

12 INB- Inverting input, Channel B (Reference Circuit 1)

13 OUTB Output, Channel B (Reference Circuit 3)

14 VS+ Positive supply

15 OUTA Output, Channel A (Reference Circuit 3)

16 INA- Inverting input, Channel A (Reference Circuit 1)

10

Circuit 3

OUT

R

F

Applications Information

EL5397C - Preliminary

EL5397C - Preliminary

Triple 200MHz Fixed Gain Amplifier

Product Description

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.

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.

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.

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,

particularly for the SO package, should be avoided if
possible. Sockets add parasitic inductance and capaci­tance which will result in additional peaking and
overshoot.

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.)

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.

Feedback Resistor Values

The EL5397C has been designed and specified at a gain
of +2 with R
back resistor gives 200MHz of -3dB bandwidth at AV=2
with 2dB of peaking. With AV=-2, an RF of approxi-

mately 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.

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

approximately 500Ω. This value of feed-

F

11

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 R
still retain stability, resulting in only a slight loss of
bandwidth with increased closed-loop gain.

EL5397C - Preliminary

below the specified 475Ω and

F

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.

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.

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 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 specifica-

tions of 0.03% and 0.04°, while driving 150Ω at a gain

of 2.

Video performance has also been measured with a 500Ω

load at a gain of +1. Under these conditions, the

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.

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 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.

Current Limiting

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 (T
determine if power supply voltages, load conditions, or
package type need to be modified for the EL5397C to

) for the application to

JMAX

12

EL5397C - Preliminary

Triple 200MHz Fixed Gain Amplifier

EL5397C - Preliminary

remain in the safe operating area. These parameters are
calculated as follows:

T

JMAXTMAXθJA

nPD

××()+=

MAX

where:

T

= Maximum Ambient Temperature

MAX

θ

= Thermal Resistance of the Package

JA

n = Number of Amplifiers in the Package

PD

= Maximum Power Dissipation of Each

MAX

Amplifier in the Package

PD

for each amplifier can be calculated as follows:

MAX

PD

MAX

2( V

SISMAX

) VS( V

OUTMAX

where:

VS = Supply Voltage

I

= Maximum Supply Current of 1A

SMAX

V

OUTMAX

= Maximum Output Voltage (Required)

RL = Load Resistance

)

V

OUTMAX

----------------------------×–+××=

R

L

13

EL5397C - Preliminary

Triple 200MHz Fixed Gain Amplifier

EL5397C - Preliminary

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.

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 sup-

Elantec Semiconductor, Inc.

675 Trade Zone Blvd.
Milpitas, CA 95035
Telephone: [phone]

(888) ELANTEC

Fax: [phone]
European Office: [phone]

Japan Technical Center: [phone]

port 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.

September 19, 2001

14

Printed in U.S.A.