August 1996
N
Comlinear CLC408
High-Speed, Low-Power Line Driver
General Description
Features
■
The Comlinear CLC408 delivers high output drive current
(96mA), but consumes minimal quiescent supply current
(1.5mA). Its current feedback architecture, fabricated in an
advanced complementary bipolar process, maintains consistent
performance over a wide range of gains and signal levels.
96mA output current
■
1.5mA supply current
■
130MHz bandwidth (Av = +2)
■
-85/-75dBc HD2/HD3 (1MHz)
■
15ns settling to 0.2%
■
350V/µs slew rate
■
The CLC408 offers superior dynamic performance with a
Dual version available (CLC418)
130MHz small-signal bandwidth, 350V/µs slew rate and 4.6ns
Applications
rise/fall times (2V ). The combination of low quiescent power,
pp
■
Coaxial cable driver
high output drive current, and high-speed performance make
the CLC408 a great choice for many portable and battery-
powered personal communication and computing systems.
■
Twisted pair driver
■
Transformer/coil driver
■
High capacitive load driver
■
Video line driver
ADSL/HDSL driver
Portable/battery-powered line driver
A/D driver
The CLC408 drives low-impedance loads, including capacitive
loads, with little change in performance. Into a 100Ω load, it
■
■
delivers -85/-64dBc second/third harmonic distortion (A = +2,
v
■
V
= 2V , f = 1MHz). With a 25Ω load, and the same
o
pp
conditions, it produces only -67/-62dBc second/third harmonic
distortion. It is also an excellent choice for driving high currents
into single-ended transformers and coils.
Non-Inverting Frequency Response
(Av = +2V/V, RL = 25Ω)
When driving the input of high resolution A/D converters, the
CLC408 provides excellent -85/-75dBc second/third harmonic
distortion and fast settling time (A = +2, V = 2V , f = 1MHz,
v
o
pp
R =1kΩ).
L
1M
10M
100M
Frequency (Hz)
Typical Application Diagram
Pinout
Full Duplex Cable Driver
DIP & SOIC
VinA
Rt1
VinB
+
+
Z0
Rm1
Rm1
CLC408
-
CLC408
Rt1
-
Rf1
Rf1
Rf2
Rg2
Rg2
Rf2
VEE
-
-
VoB
VoA
CLC426
CLC426
+
Rt2
Rt2
+
© 1996 National Semiconductor Corporation
Printed in the U.S.A.
http://www.national.com