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PDF EL2360C Data sheet ( Hoja de datos )
| Número de pieza | EL2360C | |
| Descripción | Triple 130 MHz Current Feedback Amplifier | |
| Fabricantes | Elantec Semiconductor | |
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EL2360C
Triple 130 MHz Current Feedback Amplifier
Features
Triple amplifier topology
130 MHz b3 dB bandwidth
(AVe a2)
180 MHz b3 dB bandwidth
(AVe a1)
Wide supply range g2V to
g15V
80 mA output current (peak)
Low cost
1500 V ms slew rate
Input common mode range to
within 1 5V of supplies
35 ns settling time to 0 1%
Available in single (EL2160C)
dual (EL2260C) and quad
(EL2460C) form
Applications
RGB amplifiers
Video amplifiers
Cable driver
Test equipment amplifiers
Current to voltage converters
Video broadcast equipment
Ordering Information
Part No Temp Range Package Outline
EL2360CN b40 C to a85 C 16bPin PDIP MDP0031
EL2360CS b40 C to a85 C 16bPin SOIC MDP0027
General Description
The EL2360C is a triple current-feedback operational amplifier
which achieves a b3 dB bandwidth of 130 MHz at a gain of
a2 Built using the Elantec proprietary monolithic comple-
mentary bipolar process these amplifiers use current mode
feedback to achieve more bandwidth at a given gain than a
conventional voltage feedback amplifier
The EL2360C is designed to drive a double terminated 75X coax
cable to video levels It’s fast slew rate of 1500 V ms combined
with the triple amplifier topology makes its ideal for RGB vid-
eo applications
This amplifier can operate on any supply voltage from 4V
(g2V) to 33V (g16 5V) yet consume only 8 mA per amplifier
at any supply voltage The EL2360C is available in 16-pin
PDIP and SOIC packages
For Single Dual or Quad applications consider the EL2160C
EL2260C or EL2460C all in industry standard pin outs For
Single applications with a power down feature consider the
EL2166C
Connection Diagram
EL2360C SOIC P-DIP
Packages
Top View
2360 – 1
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
1996 Elantec Inc
1 page  
EL2360C
Triple 130 MHz Current Feedback Amplifier
Typical Performance Curves Contd
3 dB Bandwidth vs Supply
Voltage for AV e a1
Peaking vs Supply Voltage
for AV e a1
3 dB Bandwidth vs Temperature
for AV e a1
3 dB Bandwidth vs Supply
Voltage for AV e a2
Peaking vs Supply Voltage
for AV e a2
3 dB Bandwidth vs Temperature
for AV e a2
3 dB Bandwidth vs Supply
Voltage for AV e a10
Peaking vs Supply Voltage
for AV e a10
3 dB Bandwidth vs Temperature
for AV e a10
2360 – 3
5
5 Page 
EL2360C
Triple 130 MHz Current Feedback Amplifier
Applications Information
Product Description
The EL2360C is a triple current feedback ampli-
fier that offers wide bandwidth and good video
specifications at moderately low supply currents
It is built using Elantec’s proprietary compli-
mentary bipolar process and is offered in both a
16 pin PDIP and SOIC packages Due to the cur-
rent feedback architecture the EL2360C clo-
sedbloop b3 dB bandwidth is dependent on the
value of the feedback resistor First the desired
bandwidth is selected by choosing the feedback
resistor RF and then the gain is set by picking a
gain resistor RG The curves at the beginning of
the Typical Performance Curves section show the
effect of varying both RF and RG The b3 dB
bandwidth is somewhat dependent on the power
supply voltage As the supply voltage is de-
creased internal junction capacitances increase
causing a reduction in the closed loop bandwidth
To compensate for this smaller values of feed-
back resistor can be used at lower supply volt-
ages
Power Supply Bypassing and Printed
Circuit Board Layout
As with any high-frequency device good printed
circuit board layout is necessary for optimum
performance Ground plane construction is high-
ly recommended Lead lengths should be as short
as possible preferably below ’’ The power sup-
ply pins must be well bypassed to reduce the risk
of oscillation The combination of a 1 0 mF tanta-
lum capacitor in parallel with a 0 01 mF ceramic
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 In-
verting Input section) This implies keeping the
ground plane away from this pin Carbon or Met-
al-Film resistors are acceptable with the Metal-
Film resistors giving slightly less peaking and
bandwidth because of their additional series in-
ductance Use of sockets particularly for the SO
package should be avoided if possible Sockets
add parasitic inductance and capacitance which
will result in some additional peaking and over-
shoot
Capacitance at the Inverting Input
Any manufacturer’s high-speed voltage- or cur-
rent-feedback amplifier can be affected by stray
capacitance at the inverting input The character-
istic curve of gain vs frequency with variations
in CINb emphasizes this effect The curve illus-
trates how the bandwidth can be extended to be-
yond 200 MHz with some additional peaking
with an additional 2pF of capacitance at the
VINb pin For inverting gains this parasitic ca-
pacitance 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 open-loop re-
sponse The use of large value feedback and gain
resistors further exacerbates the problem by fur-
ther lowering the pole frequency
Feedback Resistor Values
The EL2360C has been designed and specified at
a gain of a2 with RF e 560X This value of
feedback resistor yields relatively flat frequency
response with little to no peaking out to 130
MHz Since the EL2360C 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 example by reducing RF to 430X
bandwidth can be extended to 170 MHz with un-
der 1 dB of peaking Further reduction of RF to
360X increases the bandwidth to 195 MHz with
about 2 5 dB of peaking
Bandwidth vs Temperature
Whereas many amplifier’s supply current and
consequently b3 dB bandwidth drop off at high
temperature the EL2360C was designed to have
little supply current variation with temperature
An immediate benefit from this is that the b3
dB bandwidth does not drop off drastically with
temperature With VS e g15V and AV e a2
the bandwidth varies only from 150 MHz to 110
MHz over the entire die junction temperature
range of b50 C k T k 150 C
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet EL2360C.PDF ] | |
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| Número de pieza | Descripción | Fabricantes |
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| EL2360CS | Triple 130 MHz Current Feedback Amplifier | Elantec Semiconductor |
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