CLC400
Fast Settling, Wideband Low Gain Monolithic Op Amp
General Description
The CLC400 is a high speed, fast setting operational ampli-
fier designed for low gain applications. Constructed using a
unique, proprietary design and an advanced complementary
bipolar process, the CLC400 offers performance far beyond
that normally offered by ordinary monolithic op amps. In
addition, unlike many other high speed op amps the CLC400
offers both high performance and stability without the need
for compensation circuitry -- even at a gain of +1.
The fast 12ns settling to 0.05% and its ability to drive capaci-
tive loads makes the CLC400 an ideal flash A/D driver. The
wide bandwidth of 200MHz and the very linear phase ensure
unsurpassed signal fidelity. Systems employing digital to
analog converters also benefit from the use of the CLC400
-- especially if linearity and drive levels are important to
system performance.
The CLC400 provides a simple, high performance solution
for video distribution and line driving applications. The 50mA
output current and guaranteed specifications for 100
loads
provide ample drive capability and assured performance.
The CLC400 is based on National's proprietary op amp
topology that uses current feedback instead of the usual
voltage feedback. This unique design has many advantages
over conventional designs (such as settling time that is
relatively independent of gain), yet it is used in basically the
same way (see the gain equations in
Figure 1 and Figure 2).
However, an understanding of the topology will aid in achiev-
ing the best performance. The following discussion will pro-
ceed for the non-inverting gain configuration with the invert-
ing mode analysis being very similar.
Enhanced Solutions (Military/Aerospace)
SMD Number: 5962-89970
Space level versions also available.
For more information, visit http://www.national.com/mil
Features
n
-3dB bandwidth of 200MHz
n
0.05% settling in 12ns
n
Low power, 150mW
n
Low distortion, -60dBc at 20MHz
n
Stable without compensation
n
Overload and short circuit protected
n
1 to
8 closed loop gain range
Applications
n
Flash, precision A/D conversion
n
Video distribution
n
Line drivers
n
D/A current-to-voltage conversion
n
Photodiode, CCD preamps
n
IF processors
n
High speed communications
Pulse Response
01274309
Connection Diagram
01274319
Pinout
DIP & SOIC
May 2001
CLC400
Fast
Settling,
W
ideband
Low
Gain
Monolithic
Op
Amp
2001 National Semiconductor Corporation
DS012743
www.national.com
Ordering Information
Package
Temperature Range
Industrial
Part Number
Package Marking
NSC Drawing
8-pin plastic DIP
-40C to +85C
CLC400AJP
CLC400AJP
N08E
8-pin plastic SOIC
-40C to +85C
CLC400AJE
CLC400AJE
M08A
CLC400
www.national.com
2
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (V
CC
)
7V
I
OUT
Output is short circuit protected to
ground, but maximum reliability will
be maintained if I
OUT
does not
exceed...
60mA
Common Mode Input Voltage
V
CC
Differential Input Voltage
10V
Junction Temperature
+150C
Operating Temperature Range
-40C to +85C
Storage Temperature Range
-65C to +150C
Lead Solder Duration (+300C)
10 sec
ESD rating (human body model)
500V
Operating Ratings
Thermal Resistance
Package
(
JC
)
(
JA
)
MDIP
70C/W
125C/W
SOIC
65C/W
145C/W
Electrical Characteristics
A
V
= +2, V
CC
=
5V, R
L
= 100
, R
f
= 250
; Unless Specified
Symbol
Parameter
Conditions
Typ
Max/Min Ratings
(Note 2)
Units
Ambient Temperature
CLC400AJ
+25C
-40C
+25C
+85C
Frequency Domain Response
SSBW
-3dB Bandwidth
V
OUT
<
0.5V
PP
200
150
150
120
MHz
LSBW
V
OUT
<
5V
PP
, A
V
= +5
50
35
35
35
MHz
Gain Flatness
V
OUT
<
0.5V
PP
GFPL
Peaking
<
40MHz
0
0.4
0.3
0.4
dB
GFPH
Peaking
>
40MHz
0
0.7
0.5
0.7
dB
GFR
Rolloff
<
75MHz
0.6
1.0
1.0
1.3
dB
LPD
Linear Phase Deviation
to 75MHz
0.2
1.0
1.0
1.2
deg
Time Domain Response
TRS
Rise and Fall Time
0.5V Step
1.6
2.4
2.4
2.4
ns
TRL
5V Step
6.5
10
10
10
ns
TSP
Settling Time to
0.1%
2V Step
10
13
13
13
ns
TS
Settling Time to
0.05%
2V Step
12
15
15
15
ns
OS
Overshoot
0.5V Step
0
15
10
10
%
SR
Slew Rate
A
V
= +2
700
430
430
430
V/s
SR1
A
V
= -2
1600
V/s
Distortion And Noise Response
HD2
2nd Harmonic Distortion
2V
PP
,20MHz
-60
-40
-45
-45
dBc
HD3
3rd Harmonic Distortion
2V
PP
,20MHz
-60
-50
-50
-50
dBc
Equivalent Input Noise
SNF
Noise Floor
>
1MHz
-157
-154
-154
-153
dBm
(1Hz)
INV
Integrated Noise
1MHz to 200MHz
40
57
57
63
V
Static, DC Performance
VIO
Input Offset Voltage (Note 3)
2
8.2
5.0
9.0
mV
DVIO
Average Temperature Coefficient
20
40
40
V/C
IBN
Input Bias Current (Note 3)
Non-Inverting
10
36
20
20
A
DIBN
Average Temperature Coefficient
100
200
100
nA/C
IBI
Input Bias Current (Note 3)
Inverting
10
36
20
30
A
DIBI
Average Temperature Coefficient
50
200
100
nA/C
PSRR
Power Supply Rejection Ratio
50
45
45
45
dB
CMRR
Common Mode Rejection Ration
50
45
45
45
dB
ICC
Supply Current (Note 3)
No Load
15
23
23
23
mA
CLC400
www.national.com
3
Electrical Characteristics
(Continued)
A
V
= +2, V
CC
=
5V, R
L
= 100
, R
f
= 250
; Unless Specified
Symbol
Parameter
Conditions
Typ
Max/Min Ratings
(Note 2)
Units
Miscellaneous Performance
RIN
Non Inverting Input
Resistance
200
>
50
>
100
>
100
k
CIN
Capacitance
0.5
<
2.0
<
2.0
<
2.0
pF
RO
Output Impedance
At DC
0.1
<
0.2
<
0.2
<
0.2
VO
Output Voltage Range
No Load
3.5
>
3.0
>
3.2
>
3.2
V
CMIR
Common Mode Input Range
For Rated Performance
2.1
>
1.2
>
2.0
>
2.0
V
IO
Output Current
60
>
35
>
50
>
50
mA
Note 1: "Absolute Maximum Ratings" are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the devices
should be operated at these limits. The table of "Electrical Characteristics" specifies conditions of device operation.
Note 2: Max/min ratings are based on product characterization and simulation. Individual parameters are tested as noted. Outgoing quality levels are determined
from tested parameters.
Note 3: AJ-level: spec. is 100% tested at +25C, sample at 85C.
Typical Performance
Characteristics
(T
A
= 25C, A
V
= +2, V
CC
=
5V, R
L
= 100
; Unless Specified).
Non-Inverting Frequency Response
Inverting Frequency Response
01274301
01274302
Frequency Response for Various R
L
S
Frequency Response for Various R
L
S
01274303
01274303
CLC400
www.national.com
4
Typical Performance Characteristics
(T
A
= 25C, A
V
= +2, V
CC
=
5V, R
L
= 100
; Unless
Specified). (Continued)
Open-Loop Transimpedance Gain, Z(s)
2nd and 3rd Harmonic Distortion
01274304
01274305
2-Tone, 3rd Order, Intermodulation Intercept
Equivalent Input Noise
01274306
01274307
CMRR and PSRR
Pulse Response
01274308
01274309
CLC400
www.national.com
5
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