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CLC450 Schematic ( PDF Datasheet ) - National Semiconductor

Teilenummer CLC450
Beschreibung Single Supply/ Low-Power/ High Output/ Current Feedback Amplifier
Hersteller National Semiconductor
Logo National Semiconductor Logo 




Gesamt 12 Seiten
CLC450 Datasheet, Funktion
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






CLC450 Datasheet, Funktion
±5V Typical Performance (Av = +2, Rf = 1k, RL = 100, Vs = +5V1, Vcm = VEE + (Vs/2), RL tied to Vcm, unless specified)
Small Signal Pulse Response
Av = +2
Large Signal Pulse Response
Av = +2
Av = -2
Av = -2
Time (20ns/div)
Time (20ns/div)
2nd Harmonic Distortion, RL = 25
-30
10MHz
-40
5MHz
-50
2MHz
-60
-70 1MHz
-80
0
1 2 34
Output Amplitude (Vpp)
3rd Harmonic Distortion, RL = 100
-30
5
-40
-50 10MHz
5MHz
-60
2MHz
-70
1MHz
-80
0
1 2 34
Output Amplitude (Vpp)
Recommended Rs vs. CL
70
+
60
-
1k
50 1k
40
Rs
CL
30
20
10
0
10 100
CL (pF)
IBI, IBN, Vos vs. Temperature
1.5
5
RL
1000
12
1
0.5
Vos
0
IBI
IBN
8
4
0
3rd Harmonic Distortion, RL = 25
-20
10MHz
-30
5MHz
-40
-50 2MHz
-60 1MHz
-70
0
1 2 34
Output Amplitude (Vpp)
2nd Harmonic Distortion, RL = 1k
-60
5
-65
-70 5MHz
-75
10MHz
-80
2MHz
-85
-90
-95
0
1MHz
1 2 34
Output Amplitude (Vpp)
5
Maximum Output Voltage vs. RL
10
9
8
7
6
5
4
3
2
10 100
RL ()
1000
Short Term Settling Time
0
Vo = 2Vstep
-0.05
-0.1
-0.15
-0.5
-100
-50 0 50 100
Temperature (°C)
-4
150
-0.2
1
10 100
Time (ns)
1000
2nd & 3rd Harmonic Distortion
-40
Vo = 2Vpp
-50
3rd
RL = 100
3rd
RL = 1k
-60
2nd
-70 RL = 100
-80
2nd
RL = 1k
-90
0.1M
1M
Frequency (Hz)
10M
2nd Harmonic Distortion, RL = 100
-50
-55
-60
10MHz
-65
-70 5MHz
-75
-80
-85
0
2MHz
1MHz
1 2 34
Output Amplitude (Vpp)
3rd Harmonic Distortion, RL = 1k
-50
-55 10MHz
-60
5MHz
-65
-70 2MHz
-75
-80 1MHz
-85
-90
0
1 2 34
Output Amplitude (Vpp)
5
5
Differential Gain & Phase
-0.01
f = 3.58MHz
Gain Positive Sync
-0.015
Gain Negative Sync
-0.2
-0.3
-0.02 -0.4
-0.025
-0.03
-0.035
1
Phase Positive Sync
Phase Negative Sync
23
Number of 150Loads
Long Term Settling Time
0.2
Vo = 2Vstep
0.15
0.1
0.05
0
-0.05
-0.1
-0.15
-0.2
1µ
10µ 100µ 1m 10m
Time (s)
100m
-0.5
-0.6
-0.7
4
1
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CLC450 pdf, datenblatt
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circuitry and specifications.
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