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Электронный компонент: CLC412AJE

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N
CLC412
Dual Wideband Video Op Amp
General Description
The CLC412 combines a high-speed complementary bipolar process
with National's current-feedback topology to produce a very high-
speed dual op amp. The CLC412 provides a 250MHz small-signal
bandwidth at a gain of +2V/V and a 1300V/
s slew rate while
consuming only 50mW per amplifier from 5V supplies.
The CLC412 offers exceptional video performance with its 0.02%
and 0.02 differential gain and phase errors for NTSC and PAL video
signals while driving one back terminated 75
load. The CLC412
also offers a flat gain response of 0.1dB to 30MHz and very low
channel-to-channel crosstalk of -76dB at 10MHz. Additionally, each
amplifier can deliver a 70mA continuous output current. This level of
performance makes the CLC412 an ideal dual op amp for high-
density broadcast-quality video systems.
The CLC412's two very well-matched amplifiers support a number of
applications such as differential line drivers and receivers. In
addition, the CLC412 is well suited for Sallen Key active filters in
applications such as anti-aliasing filters for high-speed A/D
converters. Its small 8-pin SOIC package, low power requirement,
low noise and distortion allow the CLC412 to serve portable RF
applications such as IQ-channels.
The CLC412 is available in the following versions.
CLC412AJP
-40C to +85C
8-pin Plastic DIP
CLC412AJE
-40C to +85C
8-pin Plastic SOIC
CLC412AIB
-40C to +85C
8-pin CERDIP
CLC412A8B
-55C to +125C
8-pin CERDIP,
MIL-STD-883, Level B
CLC412A8L-2A
-55C to +125C
20-pin LCC,
MIL-STD-883, Level B
CLC412AMC
-55C to +125C
dice,
MIL-STD-883, Level B
DESC SMD number: 5962-94719
June 1999
CLC412
Dual Wideband Video
Op
Amp
Features
s
Wide bandwidth: 330MHz (A
v
=+1V/V)
250MHz (A
v
=+2V/V)
s
0.1dB gain flatness to 30MHz
s
Low power: 5mA/channel
s
Very low diff. gain, phase: 0.02%, 0.02
s
-76dB channel-to-channel crosstalk
(10MHz)
s
Fast slew rate: 1300V/
s
s
Unity-gain stable
Applications
s
HDTV, NTSC & PAL video systems
s
Video switching and distribution
s
IQ amplifiers
s
Wideband active filters
s
Cable drivers
s
DC coupled single-to-differential conversions
-
+
-
+
1
2
3
4
V
out
1
V
inv
1
V
non-inv
1
-Vcc
+V
cc
V
out
2
V
inv
2
V
non-inv
2
8
7
6
5
Pinout
DIP & SOIC
CLC412
CLC412
R
in
+
+
-
-
V
out
V
in
R
2
R
f
C
2
C
1
R
f
R
1
R
g
V
V
K
R R C C
s
s
R C
R C
K
R C
R R C C
out
in
o
=
+
+
+
-
+
1 2
1
2
2
1 1
2
2
9
2
2
1 2
1
2
1
1
1
1
1999 National Semiconductor
Corporation
http://www.national.com
Printed in the U.S.A.
Typical Application
Sallen-Key Low-Pass Filter
CLC412 Electrical Characteristics
(A
V
= +2; R
f
= 634
; V
CC
= 5V; R
L
= 100
)
PARAMETERS
CONDITIONS
TYP
MIN/MAX RATINGS
UNITS
SYMBOL
Ambient Temperature
CLC412 AJ
+25C
-40C
+25C
+85C
FREQUENCY DOMAIN RESPONSE
-3dB bandwidth
V
out
< 0.5V
pp
250
150
175
135
MHz
SSBW
V
out
< 4.0V
pp
105
80
80
65
MHz
LSBW
gain flatness
V
out
< 0.5V
pp
peaking
DC to 30MHz
0.1
0.1
0.1
0.2
dB
GFP
rolloff
DC to 30MHz
0.1
0.4
0.3
0.3
dB
GFR
linear phase deviation
DC to 75MHz
0.5
1.3
1.0
1.0
deg
LPD
differential gain
4.43MHz, R
L
=150
0.02
0.04
0.04
0.08
%
DG
differential phase
4.43MHz, R
L
=150
0.02
0.04
0.04
0.08
deg
DP
TIME DOMAIN RESPONSE
rise and fall time
0.5V step
1.4
2.3
2.0
2.6
ns
TRS
4V step
3.2
4.4
4.4
4.8
ns
TRL
settling time to 0.05%
2V step
12
18
18
20
ns
TSS
overshoot
0.5V step
8
15
15
15
%
OS
slew rate
2V step
1300
1000
1000
800
V/
s
SR
DISTORTION AND NOISE RESPONSE
2
nd
harmonic distortion
2V
pp
, 20MHz
- 46
- 42
- 42
- 38
dBc
HD2
3
rd
harmonic distortion
2V
pp
, 20MHz
- 50
- 46
- 46
- 42
dBc
HD3
3
rd
order intermodulation intercept
10MHz
43
dBm
1Hz
IMD
equivalent noise input
non-inverting voltage
>1MHz
3.0
3.4
3.4
3.8
nV/
Hz
VN
inverting current
>1MHz
12.0
13.9
13.9
15.5
pA/
Hz
NICN
non-inverting current
>1MHz
2.0
2.6
2.6
3.0
pA/
Hz
ICN
noise floor
>1MHz
- 157
- 156
- 156
- 155
dBm
1Hz
SNF
crosstalk
input-referred 10MHz
- 76
- 70
- 70
- 70
dB
XTLKA
STATIC DC PERFORMANCE
*input offset voltage
2
10
6
12
mV
VIO
average drift
30
60
____
60
V/C
DVIO
*input bias current
non-inverting
5
28
12
12
A
IBN
average drift
30
187
____
90
nA/C
DIBN
*input bias current
inverting
3
34
15
20
mA
IBI
average drift
20
125
____
80
nA/C
DIBI
power supply rejection ratio
DC
50
46
46
44
dB
PSRR
common mode rejection ratio
DC
50
45
45
43
dB
CMRR
*supply current
R
L
=
10.2
13.6
12.8
12.8
mA
ICC
MISCELLANEOUS PERFORMANCE
input resistance
non-inverting
1000
300
500
500
k
RIN
input capacitance
non-inverting
1.0
2.0
2.0
2.0
pF
CIN
output resistance
closed loop
0.04
0.6
0.3
0.2
ROUT
output voltage range
R
L
=
+ 3.8,-3.3
+ 3.6,-2.9 + 3.7,-3.0
+ 3.7,-3.0
V
VO
R
L
=100
+ 3.1,-2.9
+ 2.0,-2.5 2.7
2.7
V
VOL
R
L
=100
(0 to 70C)
+ 2.5,-2.6
V
VOLC
input voltage range
common mode
2.2
1.4
2.0
2.0
V
CMIR
output current
70
25
45
45
mA
IO
Min/max ratings are based on product characterization and simulation. Individual parameters are tested as noted. Outgoing quality levels
are determined from tested parameters.
http://www.national.com
2
Absolute Maximum Ratings
Miscellaneous Ratings
V
cc
7V
I
out
short circuit protected to ground, however maximum reliabiliy
is obtained if I
out
does not exceed...
125mA
common-mode input voltage
V
cc
maximum junction temperature
+150C
operating temperature range: AJ
-40C to +85C
storage temperature range
-65C to +150C
lead temperature (soldering 10 sec)
+300C
ESD (100V machine test)
1000V
Recommended gain range
1 to 10V/V
Notes:
* AJ : 100% tested at +25C.
Reliability Information
Transistor count
68
Package Thermal Resistance
Package




JC




JA
AJP
70C/W
125C/W
AJE
65C/W
145C/W
A8B
40C/W
130C/W
3
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4
CLC412
V
in
V
out
R
f
R
g
R
in
R
o
+
-
C
3
C
2
C
1
C
4
+
+
-V
cc
+V
cc
Application Introduction
Offered in an 8-pin package for reduced space and cost,
the wideband CLC412 dual current-feedback op amp
provides closely matched DC & AC electrical performance
characteristics making the part an ideal choice for
wideband signal processing. Applications such as
broadcast-quality video systems, IQ amplifiers, filter
blocks, high-speed peak detectors, integrators and
transimpedance amplifiers will all find superior
performance in the CLC412 dual op amp.
Feedback Resistor Selection
The loop gain and frequency response for a current-
feedback operational amplifier is determined largely by
the feedback resistor, R
f
. The Electrical Characteristics
and Typical Performance plots specify an R
f
of 634
, a
gain of +2V/V and operation with
5V power supplies
(unless otherwise stated). Generally, lowering R
f
from its
recommended value will peak the frequency response
and extend the bandwidth while increasing its value will
roll off the response. Reducing the value of R
f
too far
below its recommended value will cause overshoot,
ringing and eventually oscillation.
The plot above labeled "Frequency Response vs. R
f
"
shows the CLC412's frequency and phase response as
R
f
is varied while the gain remains constant at +2V/V
(R
L
=100
). This plot shows that one particular value of
R
f
will optimize the frequency and phase response at the
specified gain setting, i.e. 634
at a gain of +2V/V.
Current-feedback op amps, unlike voltage-feedback op
amps, have a direct relationship between their frequency
and phase response to the value of the feedback resistor,
R
f
. For more information see Application Note OA-13
which describes the relationship between R
f
and closed-
loop frequency response.
When configuring the CLC412 for other inverting or non-
inverting gains, it is necessary to adjust the value of the
feedback resistor in order to optimize the device's
frequency and phase response. The two plots below
provide the means of selecting the recommended
feedback-resistor value for both inverting and non-
inverting gain selections. Both plots show the value of R
f
approaching a non-zero minimum (dashed line) at high
gains, which is characteristic of current-feedback op
amps, while the linear portion of the two (solid) curves
(i.e. -5>A
v
>+6) results from the limitation placed on R
g
(i.e. R
g
50
). This limitation is due to the desire to keep
R
g
greater in value than that of the inverting input
resistance. Therefore, the resulting small-signal
V
in
V
out
R
f
R
b
R
g
R
o
+
-
C
3
C
2
C
1
C
4
+
+
-V
cc
+V
cc
CLC412
Figure 1
Figure 2
5
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