|
|
PDF EL2176CN Data sheet ( Hoja de datos )
| Número de pieza | EL2176CN | |
| Descripción | 70 MHz/1 mA Current Mode Feedback Amp w/Disable | |
| Fabricantes | Elantec Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de EL2176CN (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
|
No Preview Available !
EL2176C EL2276C
70 MHz 1 mA Current Mode Feedback Amp w Disable
Features
Single (EL2176C) and dual
(EL2276C) topologies
1 mA supply current (per
amplifier)
70 MHz b3 dB bandwidth
Low cost
Fast disable
Powers down to 0 mA
Single- and dual-supply
operation down to g1 5V
0 15% 0 15 diff gain diff phase
into 150X
800V ms slew rate
Large output drive current
100 mA (EL2176C)
55 mA (EL2276C)
Also available without disable in
single (EL2170C) dual
(EL2270C) and quad (EL2470C)
Higher speed EL2180C EL2186C
family also available (3 mA
250 MHz) in single dual and
quad
Applications
Low power battery applications
HDSL amplifiers
Video amplifiers
Cable drivers
RGB amplifiers
Test equipment amplifiers
Current to voltage converters
Ordering Information
Part No Temp Range Package Outline
EL2176CN b40 C to a85 C 8-Pin PDIP MDP0031
EL2176CS b40 C to a85 C 8-Pin SOIC MDP0027
EL2276CN b40 C to a85 C 14-Pin PDIP MDP0031
EL2276CS b40 C to a85 C 14-Pin SOIC MDP0027
General Description
The EL2176C EL2276C are single dual current-feedback oper-
ational amplifiers which achieve a b3 dB bandwidth of 70 MHz
at a gain of a1 while consuming only 1 mA of supply current
per amplifier They will operate with dual supplies ranging
from g1 5V to g6V or from single supplies ranging from a3V
to a12V The EL2176C EL2276C also include a disable power-
down feature which reduces current consumption to 0 mA while
placing the amplifier output in a high impedance state In spite
of its low supply current the EL2276C can output 55 mA while
swinging to g4V on g5V supplies The EL2176C can output
100 mA with similar output swings These attributes make the
EL2176C EL2276C excellent choices for low power and or low
voltage cable-driver HDSL or RGB applications
For Single Dual and Quad applications without disable consid-
er the EL2170C (8-Pin Single) EL2270C (8-Pin Dual) or
EL2470C (14-Pin Quad) For higher bandwidth applications
where low power is still a concern consider the EL2180C
El2186C family which also comes in similar Single Dual and
Quad configurations The EL2180C EL2186C family provides a
b3 dB bandwidth of 250 MHz while consuming 3 mA of supply
current per amplifier
Connection Diagrams
EL2176C SO P-DIP
EL2276C SO P-DIP
2176 – 1
2176 – 2
Manufactured under U S Patent No 5 352 989 5 351 012 5 418 495
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
1995 Elantec Inc
1 page  
EL2176C EL2276C
70 MHz 1 mA Current Mode Feedback Amp w Disable
Typical Performance Curves
Non-Inverting
Frequency Response (Gain)
Non-Inverting
Frequency Response (Phase)
Frequency Response for
Various RF and RG
2176 – 5
Inverting Frequency
Response (Gain)
2176 – 6
Inverting Frequency
Response (Phase)
2176 – 7
Frequency Response for
Various RL and CL
2176 – 8
Transimpedance (ROL)
2176 – 9
PSRR and CMRR
2176 – 10
Frequency Response
for Various CINb
2176 – 11
2176 – 12
5
2176 – 13
5 Page 
EL2176C EL2276C
70 MHz 1 mA Current Mode Feedback Amp w Disable
Applications Information Contd
back and gain resistors further exacerbates the
problem by further lowering the pole frequency
The EL2176C EL2276C have been specially de-
signed to reduce power dissipation in the feed-
back network by using large 1 0 kX feedback and
gain resistors With the high bandwidths of these
amplifiers these large resistor values would nor-
mally cause stability problems when combined
with parasitic capacitance but by internally can-
celing the effects of a nominal amount of parasit-
ic capacitance the EL2176C EL2276C remain
very stable For less experienced users this fea-
ture makes the EL2176C EL2276C much more
forgiving and therefore easier to use than other
products not incorporating this proprietary cir-
cuitry
The experienced user with a large amount of PC
board layout experience may find in rare cases
that the EL2176C EL2276 C have less band-
width than expected In this case the inverting
input may have less parasitic capacitance than
expected by the internal compensation circuitry
of the EL2176C EL2276C The reduction of feed-
back resistor values (or the addition of a very
small amount of external capacitance at the in-
verting input e g 0 5 pF) will increase band-
width as desired Please see the curves for Fre-
quency Response for Various RF and RG and
Frequency Response for Various CINb
Feedback Resistor Values
The EL2176C EL2276C have been designed and
specified at gains of a1 and a2 with RF e
1 0 kX This value of feedback resistor gives
70 MHz of b3 dB bandwidth at AV e a1 with
about 1 5 dB of peaking and 60 MHz of b3 dB
bandwidth at AV e a2 with about 0 5 dB of
peaking Since the EL2176C EL2276C are cur-
rent-feedback amplifiers 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 EL2176C is a current-feedback am-
plifier the gain-bandwidth product is not a con-
stant for different closed-loop gains This feature
actually allows the EL2176C EL2276C to main-
tain about the same b3 dB bandwidth regard-
less of closed-loop gain However as closed-loop
gain is increased bandwidth decreases slightly
while 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 1 0 kX and
still retain stability resulting in only a slight loss
of bandwidth with increased closed-loop gain
Supply Voltage Range and Single-
Supply Operation
The EL2176C EL2276C have been designed to
operate with supply voltages having a span of
greater than 3V and less than 12V In practical
terms this means that the EL2176C EL2276C
will operate on dual supplies ranging from g1 5V
to g6V With a single-supply the EL2176C will
operate from a3V to a12V
As supply voltages continue to decrease it be-
comes necessary to provide input and output
voltage ranges that can get as close as possible to
the supply voltages The EL2176C EL2276C
have an input voltage range that extends to with-
in 1V of either supply So for example on a sin-
gle a5V supply the EL2176C EL2276C have an
input range which spans from 1V to 4V The out-
put range of the EL2176C EL2276C is also quite
large extending to within 1V of the supply rail
On a g5V supply the output is therefore capable
of swinging from b4V to a4V Single-supply
output range is even larger because of the in-
creased negative swing due to the external pull-
down resistor to ground On a single a5V sup-
ply output voltage range is about 0 3V to 4V
Video Performance
For good video performance an amplifier is re-
quired 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 150X be-
cause of the change in output current with DC
level Until the EL2176C EL2276C good Differ-
ential Gain could only be achieved by running
high idle currents through the output transistors
(to reduce variations in output impedance)
These currents were typically in excess of the
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet EL2176CN.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| EL2176C | 70 MHz/1 mA Current Mode Feedback Amp w/Disable | Elantec Semiconductor |
| EL2176CN | 70 MHz/1 mA Current Mode Feedback Amp w/Disable | Elantec Semiconductor |
| EL2176CN | 70MHz/1mA Current Mode Feedback Amp W/Disable |  Intersil Corporation |
| EL2176CS | 70 MHz/1 mA Current Mode Feedback Amp w/Disable | Elantec Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |