clc416 National Semiconductor Corporation, clc416 Datasheet - Page 4

• Manufacturer Part Number: clc416
• Description: Dual Low-power, 120mhz Op Amp
• Manufacturer: National Semiconductor Corporation

http://www.national.com
CLC416 Typical Performance Characteristics
Description
The CLC416 is a dual current feedback amplifier with
the following features:
The professional video quality differential gain and
phase errors and low power capabilities of the CLC416
make this product a good choice for video applications.
Gain
The non-inverting and inverting gain equations for the
CLC416 are as follows:
Where R
setting resistor. Figure 1 shows the general non-invert-
ing gain configuration including the recommended
bypass capacitors.
Figure 1: Recommended Non-Inverting Gain Circuit
6
5
4
3
2
1
V
-50
Typical DC Errors vs. Temperature
in
Non-inverting Gain:
Inverting Gain:
Differential gain and phase errors of 0.01%
and 0.03° into a 150
Low, 3.9mA, supply current per amplifier
f
is the feedback resistor and R
Temperature ( C)
R
0
in
V
IO
I
BI
R
g
50
CLC416
-
+
+V
-V
I
BN
R
R
cc
cc
g
f
1
6.8 F
0.1 F
0.1 F
6.8 F
load
R
R
R
100
f
g
f
1
0
-1
-2
-3
100
CLC416 OPERATION
10
1
100
Equivalent Input Noise
g
R
is the gain
L
1k
V
Frequency (Hz)
o
10k
Non-Inverting Current = 3pA/ Hz
Inverting Current = 12pA/ Hz
4
Voltage = 5nV/ Hz
100k
Feedback Resistor Selection
The feedback resistor, R
and frequency response of a current feedback
amplifier. Optimum performance of the CLC416, at a
gain of +2V/V, is achieved with R
frequency response plots in the typical performance
section illustrate the recommended R
gains. Within limits, R
frequency response.
As a rule of thumb, if the recommended R
the bandwidth will be cut in half.
Channel Matching
Channel matching and crosstalk efficiency are largely
dependent on board layout. The layout of National’s
dual amplifier evaluation boards are designed to produce
optimum channel matching and isolation.
channel matching for the CLC416 is shown in Figure 2.
The CLC416’s channel-to-channel isolation is better
than 70dB for input frequencies of 4MHz. Input
referred crosstalk vs. frequency is illustrated in Figure 3.
(V
cc
= ±5V, A
1M
Decrease R
extend bandwidth
Increase R
reduce bandwidth
10M
1
Figure 2: Channel Matching
v
100
10
1
R
= +2, R
V
A
L
o
v
= 100
= 2V
= +2
f
f
to roll off frequency response and
pp
to peak frequency response and
1.0
0.8
0.6
0.4
0.2
f
0
Frequency (MHz)
= 348
Power Derating Curves
f
0
can be adjusted to optimize the
10
20
g
f
Channel B
, determines the loop gain
Channel B
Ambient Temperature ( C)
Channel A
R
40
L
= 100 ; unless specified)
60
Channel A
f
80
equal to 348 . The
100 120 140 160 180
f
AJP
AJE
100
f
for several
is doubled,
0
-90
-180
-270
-360
-450
Typical