CLC522
Wideband Variable Gain Amplifier
General Description
The CLC522 variable gain amplifier (VGA) is a dc-coupled,
two-quadrant multipliers with differential voltage inputs and a
single-ended voltage output. Two input buffers and an output
operational amplifier are integrated with the multiplier core
and make the CLC522 a complete VGA system that does not
require external buffering.
The CLC522 provides the flexibility of externally setting the
maximum gain with only two external resistors. Greater than
40dB gain control is easily achieved through a single high
impedance voltage input. The CLC522 provides a linear (in
Volts per Volt) relationship between the amplifier's gain and
the gain-control input voltage.
The CLC522's maximum gain may be set anywhere over a
nominal range of 2V/V to 100V/V. The gain control input then
provides attenuation from the maximum setting. For ex-
ample, set for a maximum gain of 100V/V, the CLC522 will
provide a 100V/V to 1V/V gain control range by sweeping the
gain control input voltage from +1 to -0.98V.
Set at a maximum gain of 10V/V, the CLC522 provides a
165MHz signal channel bandwidth and a 165MHz gain con-
trol bandwidth. Gain nonlinearity over a 40dB gain range is
0.5% and gain accuracy at A
Vmax
= 10V/V is typically
0.3%.
Features
n
330MHz signal bandwidth: A
Vmax
= 2
n
165MHz gain control bandwidth
n
0.3 to 60MHz linear phase deviation
n
0.04% (-68dB) signal-channel non-linearity
n
>
40dB gain adjustment range
n
Differential or single end voltage inputs
n
Single-ended voltage output
Applications
n
Variable attenuators
n
Pulse amplitude equalizers
n
HF modulators
n
Automatic gain control & leveling loops
n
Video production switching
n
Differential line receivers
n
Voltage controlled filters
Connection Diagram
Gain vs. Gain Control Voltage (V
g
)
DS012718-1
DS012718-4
Pinout
DIP & SOIC
January 2001
CLC522
W
ideband
V
ariable
Gain
Amplifier
2001 National Semiconductor Corporation
DS012718
www.national.com
Typical Application
Ordering Information
Package
Temperature Range
Industrial
Part Number
Package
Marking
NSC
Drawing
14-pin plastic DIP
-40C to +85C
CLC522AJP
CLC522AJP
N14A
14-pin plastic SOIC
-40C to +85C
CLC522AJE
CLC522AJE
M14A, B
DS012718-2
2nd Order Tuneable Bandpass Filter
DS012718-3
CLC522
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
7V
Short Circuit Current
80mA
Common-Mode Input Voltage
V
CC
Maximum Junction Temperature
+200C
Storage TemperatureRange
-65C to +150C
Lead Temperature (Soldering 10 sec)
+300C
Operating Ratings
Thermal Resistance
Package
(
JC
)
(
JA
)
MDIP
55C/W
100C/W
SOIC
35C/W
105C/W
Electrical Characteristics
(V
CC
=
5 V; A
Vmax
= +10; R
f
= 1k
; R
g
= 182
; R
L
= 100
; V
g
= +1.1V)
Symbol
Parameter
Conditions
Typ
Min/Max Ratings (Note 2)
Units
Ambient Temperature
CLC522AJE, AJP
+25C
+25C
0 to
+70C
-40 to
+85C
Frequency Domain Response
-3dB Bandwidth (Note 7)
V
OUT
<
0.5V
PP
165
120
115
110
MHz
V
OUT
<
5.0V
PP
150
100
95
90
MHz
Gain Control Bandwidth (Note 5)
V
OUT
<
0.5V
PP
165
120
115
110
MHz
Gain Flatness
V
OUT
<
0.5V
PP
Peaking (Note 7)
DC to 30MHz
0
0.1
0.1
0.1
dB
Rolloff (Note 7)
DC to 30MHz
0.05
0.25
0.25
0.4
dB
Linear Phase Deviation
DC to 60MHz
0.3
1.0
1.1
1.2
deg
Feedthrough (Note 7), (Note 6)
30MHz
-62
-57
-57
-57
dB
Time Domain Response
Rise and Fall Time
0.5V Step
2.2
2.9
3.0
3.2
ns
5.0V Step
3.0
5.0
5.0
5.0
ns
Settling Time
2.0V Step to 0.1%
12
18
18
18
ns
Overshoot
0.5V Step
2
15
15
15
%
Slew Rate
4.0V Step
2000
1400
1400
1400
V/s
Distortion And Noise Response
2nd Harmonic Distortion (Note 7)
2V
PP
, 20MHz
-50
-44
-44
-44
dBc
3rd Harmonic Distortion (Note 7)
2V
PP
, 20MHz
-65
-58
-56
-54
dBc
Equivalent Input Noise
1 to 200MHz
5.8
6.2
6.5
6.8
nV/
Noise Floor
1 to 200MHz
-152
-150
-149
-149
dBm
(1Hz)
Gain Accuracy
Signal Channel Nonlinearity
(SGNL) (Note 4)
V
OUT
=
2V
PP
0.04
0.1
0.1
0.1
%
Gain Control Nonlinearity (GCNL)
(Note 4)
Full Range
0.5
2.0
2.2
3.0
%
Gain Error (GACCU) (Note 4)
A
Vmax
= +10
0.0
0.5
0.5
1.0
dB
V
g
High
+990
+990
60
+990
60
+990
60
mV
V
g
Low
-975
-975
80
-975
80
-975
80
mV
Static, DC Performance
V
IN
Voltage Range
Common Mode
2.2
1.2
1.2
1.4
V
Bias Current (Note 4)
9
21
26
45
A
Average Drift
65
-
175
275
nA/C
Offset Current (Note 4)
0.2
2.0
3.0
4.0
A
Average Drift
5
-
30
40
nA/C
Resistance
1500
650
450
175
k
Capacitance
1.0
2.0
2.0
2.0
pF
CLC522
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3
Electrical Characteristics
(Continued)
(V
CC
=
5 V; A
Vmax
= +10; R
f
= 1k
; R
g
= 182
; R
L
= 100
; V
g
= +1.1V)
Symbol
Parameter
Conditions
Typ
Min/Max Ratings (Note 2)
Units
Static, DC Performance
V
g
Bias Current
15
38
47
82
A
Average Drift
125
-
300
600
nA/C
Resistance
100
38
30
15
k
Capacitance
1.0
2.0
2.0
2.0
pF
Output Voltage Range
R
L
=
4.0
3.7
3.6
3.5
V
Current
70
47
40
25
mA
Offset Voltage (Note 4)
A
Vmax
= +10
25
85
95
120
mV
Average Drift
100
-
350
400
V/C
Resistance
0.1
0.2
0.3
0.6
I
Rgmax
1.8
1.37
1.26
1.15
mA
Power Supply Sensitivity (Note 7)
Output Referred
10
40
40
40
mV/V
Common Mode Rejection Ratio
Input Referred
70
59
59
59
dB
ICC
Supply Current (Note 4)
R
L
=
46
61
62
63
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: Min/max ratings are based on product characterization and simulation. Individual parameters are tested as noted. Outgoing quality levels are determined
from tested parameters.
Note 3: AJE (SOIC) is tested/guaranteed with R
f
= 866
and R
g
165
Note 4: J-level: spec. is 100% tested at +25C, sample tested at +85C.
Note 5: Tested with V
IN
= 0.2V and V
g
<
0.5V
PP
Note 6: Feedthrough is tested at maximum attenuation (i.e., V
g
= -1.1V
Note 7: J-level, spec is sample tested at 25C.
Typical Performance Characteristics
Frequency Response (A
Vmax
= 2)
DS012718-5
Frequency Response (A
Vmax
=10)
DS012718-6
CLC522
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4
Typical Performance Characteristics
(Continued)
Frequency Response (A
Vmax
=100)
DS012718-7
PSRR and CMRR (input Referred)
DS012718-8
Feed-Through Isolation
DS012718-9
Gain Flatness & Linear Phase Deviation
DS012718-10
SGNL vs. V
g
, Gain
DS012718-11
Large Signal Frequency Response
DS012718-12
CLC522
www.national.com
5
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