June 1999
N
CLC5665
Low Distortion Amplifier with Disable
General Description
The CLC5665 is a low-cost, wideband amplifier that provides very
Features
■
0.1dB gain flatness to 20MHz (A = +2)
v
■
■
■
■
■
■
■
■
■
90MHz bandwidth (A = +1)
Large signal BW 25MHz
1800V/µs slew rate
0.05%/0.05° differential gain/phase
±5V, ±15V or single supplies
200ns disable to high-impedance output
Wide gain range
low 2nd and 3rd harmonic distortion at 1MHz (-89/-92dBc). The
v
great slew rate of 1800V/µs, bandwidth of 90MHz (A = +1) and
v
fast disable make it an excellent choice for many high speed
multiplexing applications. Like all current feedback op amps, the
CLC5665 allows the frequency response to be optimized
(or adjusted) by the selection of the feedback resistor. For
demanding video applications, the 0.1dB bandwidth to 20MHz
and differential gain/phase of 0.05%/0.05° make the CLC5665
the preferred component for broadcast quality NTSC and PAL
video systems.
-89/-92dBc HD2/HD3 (R = 500Ω)
L
Low cost
Applications
■
xDSL driver
■
Twisted pair driver
Cable driver
Video distribution
CCD clock driver
The large voltage swing (28V ), continuous output current
pp
■
(85mA) and slew rate (1800V/µs) provide high-fidelity signal
conditioning for applications such as CCDs, transmission lines
and low impedance circuits.
■
■
■
Multimedia systems
■
DAC output buffers
xDSL, video distribution, multimedia and general purpose
applications will benefit from the CLC5665’s wide bandwidth and
disable feature. Power is reduced and the output becomes a high
impedance when disabled. The wide gain range of the CLC5665
makes this general purpose op amp an improved solution for
circuits such as active filters, single-to-differential-ended drivers,
DAC transimpedance amplifiers and MOSFET drivers.
■
Imaging systems
Non-Inverting Frequency Response
Av = 1
Rf = 698
Gain
Av = 10
Rf = 100
Av = 2
Rf = 604
Phase
0
Av = 1
-45
-90
-135
-180
Av = 50
Av = 2
Av = 50
Rf = 500
Av = 10
1
10
100
Frequency (MHz)
DIS
Typical Application
Differential Line Driver for xDSL
Pinout
+
DIP & SOIC
+
CLC5665
-
Ro
NC
Vinv
1
2
3
4
8
7
6
5
DIS
Rf1
1:n
604Ω
-
+Vcc
Vout
NC
Rg
1.2kΩ
RL
Vin (Vpp
)
Vo = 2Vin
nVo
Rf2
+
Vnon-inv
-Vcc
604Ω
Ro
-
Note: Supply and Bypassing not shown.
CLC5665
-
+
DIS
© 1999 National Semiconductor Corporation
Printed in the U.S.A.
http://www.national.com