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PDF CLC450 Data sheet ( Hoja de datos )

Número de pieza CLC450
Descripción Single Supply/ Low-Power/ High Output/ Current Feedback Amplifier
Fabricantes National Semiconductor 
Logotipo National Semiconductor Logotipo



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No Preview Available ! CLC450 Hoja de datos, Descripción, Manual

June 1999
N
CLC450
Single Supply, Low-Power, High Output,
Current Feedback Amplifier
General Description
The CLC450 has a new output stage that delivers high output
drive current (100mA), but consumes minimal quiescent supply
current (1.5mA) from a single 5V supply. Its current feedback
architecture, fabricated in an advanced complementary bipolar
process, maintains consistent performance over a wide range of
gains and signal levels, and has a linear-phase response up to
one half of the -3dB frequency.
The CLC450 offers superior dynamic performance with a
100MHz small-signal bandwidth, 280V/µs slew rate and 6.1ns
rise/fall times (2Vstep). The combination of low quiescent power,
high output current drive, and high-speed performance make
the CLC450 well suited for many battery-powered personal
communication/computing systems.
The ability to drive low-impedance, highly capacitive loads,
makes the CLC450 ideal for single ended cable applications. It
also drives low impedance loads with minimum distortion. The
CLC450 will drive a 100load with only -75/-64dBc second/third
harmonic distortion (Av = +2, Vout = 2Vpp, f = 1MHz). With a 25
load, and the same conditions, it produces only -70/-60dBc sec-
ond/third harmonic distortion. It is also optimized for driving high
currents into single-ended transformers and coils.
When driving the input of high-resolution A/D converters, the
CLC450 provides excellent -79/-75dBc second/third harmonic
distortion (Av = +2, Vout = 2Vpp, f = 1MHz, RL = 1k) and fast
settling time.
Available in SOT23-5, the CLC450 is ideal for applications where
space is critical.
Features
s 100mA output current
s 1.5mA supply current
s 100MHz bandwidth (Av = +2)
s -79/-75dBc HD2/HD3 (1MHz)
s 20ns settling to 0.05%
s 280V/µs slew rate
s Stable for capacitive loads up to 1000pf
s Single 5V to ±5V supplies
s Available in Tiny SOT23-5 package
Applications
s Coaxial cable driver
s Twisted pair driver
s Transformer/Coil Driver
s High capacitive load driver
s Video line driver
s Portable/battery-powered applications
s A/D driver
Maximum Output Voltage vs. RL
10
9
8
7 VCC = ±5V
6
5
4
3 Vs = +5V
2
1
10 100
RL ()
1000
+5V
6.8µF
+
Typical Application
Single Supply Cable Driver
Response After 10m of Cable
Vin = 10MHz, 0.5Vpp
5k
Vin 0.1µF
5k
3 + 7 0.1µF
CLC450 6
75
2-
4 1k
0.1µF
10m of 75
Coaxial Cable
Vo
75
1k
0.1µF
Vo
Pinout
SOT23-5
VEE
VCC
Pinout
DIP & SOIC
20ns/div
© 1999 National Semiconductor Corporation
Printed in the U.S.A.
Vnon-inv
Vinv
VEE
http://www.national.com

1 page




CLC450 pdf
+5V Typical Performance (Av = +2, Rf = 1k, RL = 100, Vs = + 5V1, Vcm = VEE + (Vs/2), RL tied to Vcm, unless specified)
Closed Loop Output Resistance
100
10
1
Recommended Rs vs. CL
50
+
40
-
1k
1k
30
Rs
CL
1k
20
Large & Small Signal Pulse Response
Large Signal
Small Signal
0.1 10
0.01
10k
100k 1M 10M
Frequency (Hz)
PSRR & CMRR
60
PSRR
50
CMRR
40
100M
30
20
10
0
1k 10k 100k 1M 10M 100M
Frequency (Hz)
0
10 100
CL (pF)
IBI, IBN, Vos vs. Temperature
-0.6
1000
6
-0.7 5
IBN Vos
-0.8 4
-0.9
IBI
-1
3
2
-1.1
-100
-50 0
50 100
Temperature (°C)
1
150
Time (20ns/div)
Maximum Output Voltage vs. RL
5
4.5
4
3.5
3
2.5
2
1.5
1
10 100
RL ()
1000
±5V Typical Performance (Av = +2, Rf = 1k, RL = 100, VCC = ± 5V, unless specified)
Non-Inverting Frequency Response
Vo = 1Vpp
Gain
Phase
Av = +1
Rf = 1.3k
Av = +5
Rf = 825
Av = +10
Rf = 845
1M 10M
Frequency (Hz)
Av = +2
Rf = 845
100M
0
-90
-180
-270
-360
-450
Frequency Response vs. Vo
Inverting Frequency Response
Vo = 1Vpp
Gain
Phase
Av = -1
Rf = 866
Av = -5
Rf = 825
Av = -10
Rf = 787
1M 10M
Frequency (Hz)
Av = -2
Rf = 825
100M
-180
-270
-360
-450
-540
-630
Frequency Response vs. CL
Frequency Response vs. RL
Vo = 1Vpp
Gain
RL = 1k
RL = 100
Phase
RL = 25
1M 10M
Frequency (Hz)
Gain Flatness
100M
0
-90
-180
-270
-360
-450
Vo = 1Vpp
Vo = 5Vpp
Vo = 2Vpp
Vo = 0.1Vpp
1M 10M 100M
Frequency (Hz)
Vo = 1Vpp
CL = 10pF
Rs = 68.1
CL = 100pF
Rs = 17.4
CL = 1000pF
Rs = 6.7
+
-
1k
1k
Rs
CL
1k
1M 10M
Frequency (Hz)
100M
10 20
Frequency (MHz)
30
5 http://www.national.com

5 Page





CLC450 arduino
Where Req is the transformed value of the load imped-
ance, (RL), and is approximated by:
Req
=
RL
n2
Select the transformer so that it loads the line with a
value close to Zo, over the desired frequency range. The
output impedance, Ro, of the CLC450 varies with
frequency and can also affect the return loss. The return
loss, shown below, takes into account an ideal
transformer and the value of Ro.
Return Loss(dB) ≈ − 20log10
n2 Ro
Zo
The load current (IL) and voltage (Vo) are related to the
CLC450’s maximum output voltage and current by:
Vo n Vmax
IL
I max
n
From the above current relationship, it is obvious that an
amplifier with high output drive capability is required.
11 http://www.national.com

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