LS204CN ,HIGH PERFORMANCE DUAL BIPOLAR OPERATIONAL AMPLIFIERSLS204 HIGH PERFORMANCEDUAL OPERATIONAL AMPLIFIER ■ LOW POWER CONSUMPTION■ SHORT CIRCUIT PRO ..
LS204ID ,HIGH PERFORMANCE DUAL BIPOLAR OPERATIONAL AMPLIFIERSABSOLUTE MAXIMUM RATINGS Symbol Parameter Value UnitVSupply voltage ±18 VCCV ±VInput Voltage ..
LS204IDT ,HIGH PERFORMANCE DUAL BIPOLAR OPERATIONAL AMPLIFIERSABSOLUTE MAXIMUM RATINGS Symbol Parameter Value UnitVSupply voltage ±18 VCCV ±VInput Voltage ..
LS22BB-2Y , Illuminated Type
LS240 , OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS
LS240 , OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS
LT1631CS#PBF ,30MHz, 10V/渭s, Quad Rail-to-Rail Input and Output Precision Op Amps
LT1631CS. ,30MHz/ 10V/us/ Dual/Quad Rail-to-Rail Input and Output Precision Op Amps
LT1631IS ,30MHz, 10V/渭s, Quad Rail-to-Rail Input and Output Precision Op Amps
LT1631IS ,30MHz, 10V/渭s, Quad Rail-to-Rail Input and Output Precision Op Amps
LT1632CS8 ,45MHz/ 45V/us/ Dual/Quad Rail-to-Rail Input and Output Precision Op Amps
LT1632CS8#PBF ,45MHz, 45V/us, Dual Rail-to-Rail Input and Output Precision Op Amps
LS204-LS204CD-LS204CDT-LS204CN-LS204ID-LS204IDT
HIGH PERFORMANCE DUAL BIPOLAR OPERATIONAL AMPLIFIERS
LOW POWER CONSUMPTION SHORT CIRCUIT PROTECTION LOW DISTORTION, LOW NOISE HIGH GAIN-BANDWIDTH PRODUCT HIGH CHANNEL SEPARATION
DESCRIPTIONThe LS204 is a high performance dual operational
amplifier with frequency and phase compensation
built into the chip. The internal phase compensa-
tion allows stable operation as voltage follower in
spite of its high Gain-Bandwidth Product.
The circuit presents very stable electrical charac-
teristics over the entire supply voltage range, and
is particularly intended for professional and tele-
com applications (active filter, etc).
ORDER CODE
N = Dual in Line Package (DIP)
D = Small Outline Package (SO) - also available in Tape & Reel (DT)
PIN CONNECTIONS (top view)
HIGH PERFORMANCEDUAL OPERATIONAL AMPLIFIER
LS204
LS204
SCHEMATIC DIAGRAM (1/2 LS204)
ABSOLUTE MAXIMUM RATINGS Power dissipation must be considered to ensure maximum junction temperature (Tj) is not exceeded.
LS204
ELECTRICAL CHARACTERISTICS VCC = ±15V, Tamb = 25°C (unless otherwise specified)
LS204
LS204
LS204
APPLICATION INFORMATION: Active low-pass filter
BUTTERWORTHThe Butterworth is a "maximally flat" amplitude re-
sponse filter (figure 10) Butterworth filters are
used for filtering signals in data acquisition sys-
tems to prevent aliasing errors in samples-data
applications and for general purpose low-pass fil-
tering.
The cut-off frequency Fc, is the frequency at which
the amplitude response is down 3dB. The attenu-
ation rate beyond the cutoff frequency is n6 dB per
octave of frequency where n is the order (number
of poles) of the filter.
Other characteristics : Flattest possible amplitude response Excellent gain accuracy at low frequency
end of passband
BESSELThe Bessel is a type of “linear phase” filter. Be-
cause of their linear phase characteristics, these
filters approximate a constant time delay over a
limited frequency range. Bessel filters pass tran-
sient waveforms with a minimum of distortion.
They are also used to provide time delays for low
pass filtering of modulated waveforms and as a
“running average” type filter.
The maximum phase shift is radians where
n is the order (number of poles) of the filter. The
cut-off frequency fc, is defined as the frequency at
which the phase shift is one half of this value.
For accurate delay, the cut-off frequency should
be twice the maximum signal frequency.
The following table can be used to obtain the -3dB
frequency of the filter.
Other characteristics : Selectivity not as great as Chebyschev or
Butterworth Very little overshoot response to step inputs Fast rise time
CHEBYSCHEVChebyschev filters have greater selectivity than ei-
ther Bessel ro Butterworth at the expense of ripple
in the passband (figure 11).
Chebyschev filters are normally designed with
peak-to-peak ripple values from 0.2dB to 2dB.
Increased ripple in the passband allows increased
attenuation above the cut-off frequency.
The cut-off frequency is defined as the frequency
at which the amplitude response passes through
the specificed maximum ripple band and enters
the stop band.
Other characteristics : Greater selectivity Very non-linear phase response High overshoot response to step inputs
The table below shows the typical overshoot and setting time response of the low pass filters to a step
input.
Design of 2nd order active low pass filter (Sallen and Key configuration unity gain op-amp)–-----------
