June 1999
N
CLC412
Dual Wideband Video Op Amp
General Description
Features
TheCLC412combinesahigh-speedcomplementarybipolarprocess
with National's current-feedback topology to produce a very high-
speed dual op amp. The CLC412 provides a 250MHz small-signal
bandwidth at a gain of +2V/V and a 1300V/µs slew rate while
consuming only 50mW per amplifier from ±5V supplies.
■ Widebandwidth:330MHz(Av=+1V/V)
250MHz (Av=+2V/V)
■ 0.1dB gain flatness to 30MHz
■ Low power: 5mA/channel
■ Very low diff. gain, phase: 0.02%, 0.02°
■ -76dBchannel-to-channelcrosstalk
(10MHz)
The CLC412 offers exceptional video performance with its 0.02%
and0.02°differentialgainandphaseerrorsforNTSCandPALvideo
signals while driving one back terminated 75Ω load. The CLC412
also offers a flat gain response of 0.1dB to 30MHz and very low
channel-to-channelcrosstalkof-76dBat10MHz.Additionally,each
amplifiercandelivera70mAcontinuousoutputcurrent.Thislevelof
performance makes the CLC412 an ideal dual op amp for high-
density broadcast-quality video systems.
■ Fast slew rate: 1300V/µs
■ Unity-gain stable
Applications
■ HDTV, NTSC & PAL video systems
■ Video switching and distribution
■ IQ amplifiers
■ Wideband active filters
■ Cable drivers
■ DCcoupledsingle-to-differentialconversions
TheCLC412'stwoverywell-matchedamplifierssupportanumberof
applications such as differential line drivers and receivers. In
addition, the CLC412 is well suited for Sallen Key active filters in
applications such as anti-aliasing filters for high-speed A/D
converters. Its small 8-pin SOIC package, low power requirement,
low noise and distortion allow the CLC412 to serve portable RF
applications such as IQ-channels.
The CLC412 is available in the following versions.
CLC412AJP
CLC412AJE
CLC412AIB
CLC412A8B
-40°C to +85°C
-40°C to +85°C
-40°Cto+85°C
-55°C to +125°C
8-pin Plastic DIP
8-pin Plastic SOIC
8-pinCERDIP
8-pinCERDIP,
MIL-STD-883, Level B
20-pinLCC,
MIL-STD-883, Level B
dice,
CLC412A8L-2A
CLC412AMC
-55°C to +125°C
-55°C to +125°C
MIL-STD-883, Level B
DESCSMDnumber:5962-94719
Typical Application
Sallen-Key Low-Pass Filter
Pinout
DIP & SOIC
Vin
C1
+
R1
R2
C2
Vout
1
1
2
3
4
8
7
6
5
+Vcc
Vout
½CLC412
+
Vout
Rf
Rin
½CLC412
-
V
inv1
2
-
-
+
Rf
Ko
V
non-inv1
-Vcc
V
V
inv2
non-inv2
-
Vout
R1R2C1C2
1− K9
+
Rg
=
V
1
1
1
s2 + s
+
+
+
in
R1C1 R2C2 R2C2
R1R2C1C2
1999NationalSemiconductorCorporation
PrintedintheU.S.A.
http://www.national.com