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| 型號(hào)： | CLC451AJP |
| 英文描述： | IC-PROG BUFFER |
| 中文描述： | 集成電路PROG緩沖區(qū) |
| 文件頁(yè)數(shù)： | 7/12頁(yè) |
| 文件大?。?/td> | 198K |
| 代理商： | CLC451AJP |
7
http://www.national.com
CLC450 OPERATION
The CLC450 is a current feedback amplifier built in an
advanced complementary bipolar process. The CLC450
operates from a single 5V supply or dual ±5V supplies.
Operating from a single supply, the CLC450 has the
following features:
I
Provides 100mA of output current while
consuming 7.5mW of power
I
Offers low -79/-75dB 2nd and 3rd harmonic
distortion
I
Provides BW > 60MHz and 1MHz distortion
< -65dBc at V
o
= 2.5V
pp
The CLC450 performance is further enhanced in ±5V
supply applications as indicated in the
±5V Electrical
Characteristics
table and
±5V Typical Performance
plots.
Current Feedback Amplifiers
Some of the key features of current feedback technology
are:
I
Independence of AC bandwidth and voltage gain
I
Inherently stable at unity gain
I
Adjustable frequency response with feedback resistor
I
High slew rate
I
Fast settling
Current feedback operation can be described using a simple
equation. The voltage gain for a non-inverting or inverting
current feedback amplifier is approximated by Equation 1.
Equation 1
where:
I
A
v
is the closed loop DC voltage gain
I
R
f
is the feedback resistor
I
Z(j
ω
) is the CLC450’s open loop transimpedance
gain
( )
I
is the loop gain
The denominator of Equation 1 is approximately equal to
1 at low frequencies. Near the -3dB corner frequency,
the interaction between R
f
and Z(j
ω
) dominates the circuit
performance. The value of the feedback resistor has a
large affect on the circuits performance. Increasing R
f
has the following affects:
I
Decreases loop gain
I
Decreases bandwidth
I
Reduces gain peaking
I
I
Affects frequency response phase linearity
Refer to the
Feedback Resistor Selection
section for
more details on selecting a feedback resistor value.
V
V
A
1
R
Z(j )
o
in
v
f
=
+
Z j
R
f
ω
CLC450 DESIGN INFORMATION
Single Supply Operation (V
CC
= +5V, V
EE
= GND)
The specifications given in the
+5V Electrical Character-
istics
table for single supply operation are measured
with a common mode voltage (V
cm
) of 2.5V. V
cm
is the
voltage around which the inputs are applied and the
output voltages are specified.
Operating from a single +5V supply, the Common Mode
Input Range (CMIR) of the CLC450 is typically +0.8V to
+4.2V. The typical output range with R
L
=100
is +1.0V
to +4.0V.
For single supply DC coupled operation, keep input
signal levels above 0.8V DC. For input signals that drop
below 0.8V DC, AC coupling and level shifting the signal
are recommended. The non-inverting and inverting
configurations for both input conditions are illustrated in
the following 2 sections.
DC Coupled Single Supply Operation
Figures 1 and 2 show the recommended non-inverting
and inverting configurations for input signals that remain
above 0.8V DC.
+
CLC450
-
R
f
0.1
μ
F
6.8
μ
F
+
V
o
V
in
R
g
R
t
3
2
4
7
6
V
V
A
1
R
R
o
in
v
f
g
=
= +
V
cm
V
CC
R
L
V
cm
Note:
R
, R
and R
are tied
to V
for minimum power
consumption and maximum
output swing.
V
cm
CLC450
-
R
f
0.1
μ
F
6.8
μ
F
+
V
o
V
in
R
b
4
7
6
R
g
V
V
A
R
R
o
in
v
f
g
=
=
R
t
3
2
V
cm
V
CC
R
L
V
cm
Note:
R
, provides DC bias
for non-inverting input.
R
b
, R
L
and R
are tied
to V
for minimum power
consumption and maximum
output swing.
V
cm
Select R
t
to yield
desired R
in
= R
t
|| R
g
+
Figure 1: Non-Inverting Configuration
Figure 2: Inverting Configuration
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CLC452A8B | Current-Feedback Operational Amplifier |
| CLC452AJE | Current-Feedback Operational Amplifier |
| CLC452AJM5 | IC-SM CURRENT FBK AMP |
| CLC452AJP | Current-Feedback Operational Amplifier |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CLC452 | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:Single Supply, Low-Power, High Output, Current Feedback Amplifier |
| CLC452A8B | 制造商:未知廠(chǎng)家 制造商全稱(chēng):未知廠(chǎng)家 功能描述:Current-Feedback Operational Amplifier |
| CLC452AJ | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:Single Supply, Low-Power, High Output, Current Feedback Amplifier |
| CLC452AJE | 制造商:未知廠(chǎng)家 制造商全稱(chēng):未知廠(chǎng)家 功能描述:Current-Feedback Operational Amplifier |
| CLC452AJE-TR13 | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
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