clc5665 National Semiconductor Corporation, clc5665 Datasheet

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clc5665

Manufacturer Part Number
clc5665
Description
Low Distortion Amplifier With Disable
Manufacturer
National Semiconductor Corporation
Datasheet

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Part Number:
clc5665IM
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© 1999 National Semiconductor Corporation
Printed in the U.S.A.
N
CLC5665
Low Distortion Amplifier with Disable
General Description
The CLC5665 is a low-cost, wideband amplifier that provides very
low 2nd and 3rd harmonic distortion at 1MHz (-89/-92dBc). The
great slew rate of 1800V/ s, bandwidth of 90MHz (A
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.
The large voltage swing (28V
(85mA) and slew rate (1800V/ s) provide high-fidelity signal
conditioning for applications such as CCDs, transmission lines
and low impedance circuits.
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.
+
V
-
in
(V
pp
)
R
1.2k
CLC5665
CLC5665
+
+
-
-
g
604
604
DIS
R
R
DIS
f1
f2
V
o
pp
= 2V
), continuous output current
in
Differential Line Driver for xDSL
R
R
o
o
Typical Application
1:n
Note: Supply and Bypassing not shown.
nV
o
v
= +1) and
R
Features
Applications
L
0.1dB gain flatness to 20MHz (A
90MHz bandwidth (A
Large signal BW 25MHz
1800V/ s slew rate
0.05%/0.05° differential gain/phase
±5V, ±15V or single supplies
200ns disable to high-impedance output
Wide gain range
-89/-92dBc HD2/HD3 (R
Low cost
xDSL driver
Twisted pair driver
Cable driver
Video distribution
CCD clock driver
Multimedia systems
DAC output buffers
Imaging systems
Non-Inverting Frequency Response
1
Phase
Gain
A
v
= 50
V
non-inv
-V
R
V
A
Frequency (MHz)
NC
f
v
inv
= 500
cc
= 50
R
A
f
v
= 100
10
1
2
3
4
= 10
DIP & SOIC
A
v
R
= 2
Pinout
A
f
v
v
= 604
-
+
= 2
= +1)
A
A
v
L
v
= 10
= 1
= 500
R
A
f
v
= 698
= 1
http://www.national.com
100
8
7
6
5
June 1999
v
0
-45
-90
-135
-180
= +2)
DIS
+V
V
NC
out
cc

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clc5665 Summary of contents

Page 1

... 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 ...

Page 2

... CLC5665 Electrical Characteristics PARAMETERS CONDITIONS Ambient Temperature CLC5665 FREQUENCY DOMAIN RESPONSE small-signal bandwidth ( out small-signal bandwidth V out V out 0.1dB bandwidth V out V out large-signal bandwidth V out gain flatness V out peaking DC to 10MHz rolloff DC to 20MHz linear phase deviation DC to 20MHz differential gain 4 ...

Page 3

... CLC5665 Typical Performance Non-Inverting Frequency Response 698 Gain 100 604 Phase - - -135 -180 R = 500 100 Frequency (MHz) Open-Loop Transimpedance Gain (Zs) 130 Gain 120 0 110 ...

Page 4

... Stability Analysis of Current-Feedback Amplifiers . Resistors have varying parasitics that affect circuit performance in high-speed design. For best results, use leaded metal-film resistors or surface mount resistors. A SPICE model for the CLC5665 is available to simulate overall circuit performance. Enable/Disable Function The CLC5665 amplifier features an enable/disable function that changes the output and inverting input from low to high impedance ...

Page 5

... Decreasing the load impedance increases 3rd harmonic distortion more than 2nd. Differential Gain and Differential Phase The CLC5665 has low DG and DP errors for video applications. Add an external pulldown resistor to the CLC5665’s output to improve DG and DP as seen in Figure 4. A 604 R will improve DG and ...

Page 6

... CLC5665 R is used to match the transmission line the set the DC gain of the CLC5665, which is used in a max difference mode. R offset. The transmitting CLC5665’s are shown in a unity gain configuration because they consume the least power of any gain, for a given load. For proper operation ...

Page 7

... Frequency (ns) Figure 9: CCD Clock Driver Transistor Count Package Thermal Resistance C L Package Plastic (IN) Surface Mount (IM) Model CLC5665IN CLC5665IM CLC5665IMX 150 200 7 Reliability Information JC JA ° ° 65 C/W 130 C/W ° ° 50 C/W 145 C/W Ordering Information Temperature Range Description ° ...

Page 8

... National’s products are not authorized for use as critical components in life support devices or systems without the express written approval of the president of National Semiconductor Corporation. As used herein: 1. Life support devices or systems are devices or systems which, a) are intended for surgical implant into the body support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user ...

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