August 1996
N
Comlinear CLC450
Single Supply, Low-Power, High Output,
Current Feedback Amplifier
General Description
Features
■
The Comlinear 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 feed-
back 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.
100mA output current
■
1.5mA supply current
■
100MHz bandwidth (A = +2)
v
■
■
■
■
■
■
-79/-75dBc HD2/HD3 (1MHz)
20ns settling to 0.05%
280V/µs slew rate
Stable for capacitive loads up to 1000pf
Single 5V to ±5V supplies
The CLC450 offers superior dynamic performance with a
Available in Tiny SOT23-5 package
100MHz small-signal bandwidth, 280V/µs slew rate and 6.1ns
Applications
rise/fall times (2V
). The combination of low quiescent power,
step
■
Coaxial cable driver
high output current drive, and high-speed performance make
the CLC450 well suited for many battery-powered personal
communication/computing systems.
■
Twisted pair driver
■
Transformer/Coil Driver
■
High capacitive load driver
■
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 100Ω load with only -75/-64dBc second/third
harmonic distortion (A = +2, V = 2V , f = 1MHz). With a 25Ω
Video line driver
Portable/battery-powered applications
A/D driver
■
■
Maximum Output Voltage vs. RL
10
v
out
pp
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.
9
8
VCC = ±5V
7
6
5
4
When driving the input of high-resolution A/D converters, the
CLC450 provides excellent -79/-75dBc second/third harmonic
distortion (A = +2, V
= 2V , f = 1MHz, R = 1kΩ) and fast
v
out
pp L
3
2
1
Vs = +5V
settling time.
Available in SOT23-5, the CLC450 is ideal for applications where
space is critical.
10
100
1000
RL (Ω)
Response After 10m of Cable
+5V
Typical Application
Single Supply Cable Driver
Vin = 10MHz, 0.5Vpp
6.8µF
+
5kΩ
0.1µF
5kΩ
10m of 75Ω
Coaxial Cable
0.1µF
7
Vin
3
+
75Ω
6
Vo
75Ω
CLC450
2
-
0.1µF
4
1kΩ
20ns/div
1kΩ
0.1µF
Vo
VCC
Pinout
Pinout
SOT23-5
DIP & SOIC
VEE
VEE
Vnon-inv
Vinv
© 1996 National Semiconductor Corporation
Printed in the U.S.A.
http://www.national.com