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LS204
High performance dual operational amplifier
power consumption Short-circuit protection distortion, noise High gain-bandwidth product High channel separation
DIP8 (Plastic package)
Description
LS204 high performance dual operational amplifier with frequency phase compensation built into chip. internal phase compensation allows stable operation voltage follower spite high gain-bandwidth product. circuit presents very stable electrical characteristics over entire supply voltage range, particularly intended professional telecom applications (such active filtering).
SO-8 (Plastic micro package)
connections (top view)
Output
Inverting input Non-inverting input
VCC+
Output Inverting input Non-inverting input
June 2008
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www.st.com
Circuit schematics
LS204
Figure
Circuit schematics
Schematic diagram (1/2 LS204)
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LS204
Absolute maximum ratings operating conditions
Table
Symbol Rthja
Absolute maximum ratings operating conditions
Absolute maximum ratings
Parameter Supply voltage(1) Input voltage
Value ±VCC ±(VCC-1) Infinite +150
Unit °C/W
Differential input voltage
Thermal resistance junction ambient(4) SO-8 DIP8 Thermal resistance junction case(4) SO-8 DIP8 Output short-circuit duration(5)
Rthjc
°C/W
Tstg
Junction temperature Storage temperature range HBM: human body model(6)
machine model
CDM: charged device model
voltage values, except differential voltage, with respect zero reference level (ground) supply voltages where zero reference level midpoint between VCC+ VCC-. magnitude input voltage must never exceed magnitude supply voltage volts, whichever less. Differential voltages non-inverting input terminal with respect inverting input terminal. Short-circuits cause excessive heating destructive dissipation. Values typical. output shorted ground either supply. Temperature and/or supply voltages must limited ensure that dissipation rating exceeded. Human body model: capacitor charged specified voltage, then discharged through resistor between pins device. This done couples connected combinations while other pins floating. Machine model: capacitor charged specified voltage, then discharged directly between pins device with external series resistor (internal resistor This done couples connected combinations while other pins floating. Charged device model: pins package charged together specified voltage then discharged directly ground through only pin. This done pins.
Table
Symbol Vicm Toper
Operating conditions
Parameter Supply voltage Common mode input voltage range Operating free-air temperature range LS204C VDD+1.5 VCC-1.5 +105 LS204I Unit
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Electrical characteristics
LS204
Table
Symbol DVio DIio
Electrical characteristics
Electrical characteristics Tamb +25° (unless otherwise specified)
LS204I Parameter Min. Typ. Max. Min. Typ. Max. Supply current Input bias current Tmin Tamb Tmax Input resistance 1kHz) Input offset voltage 10k) Tmin Tamb Tmax Input offset voltage drift 10k) Tmin Tamb Tmax Input offset current Tmin Tamb Tmax Input offset current drift Tmin Tamb Tmax Output short-circuit current Large signal voltage gain Tmin Tamb Tmax ±15V Gain bandwidth product =100kHz) Equivalent input noise voltage 1kHz, Total harmonic distortion 1kHz, 20dB, 2Vpp) Output voltage swing ±15V Large signal voltage swing 10kHz Slew rate unity gain) Supply voltage rejection ratio Tmin Tamb Tmax Common mode rejection ratio ±10V Tmin Tamb Tmax 0.08 0.03 0.03 µV/°C nA/°C LS204C Unit
±Vopp Vopp
V/µs
Vo1/Vo2 Channel separation kHz)
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LS204
Electrical characteristics
Figure
Supply current versus supply voltage
Figure
Supply current versus ambient temperature
Figure
Output short circuit current versus Figure ambient temperature
Open loop frequency phase response
Figure
Output loop gain versus ambient temperature
Figure
Supply voltage rejection versus frequency
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Electrical characteristics
LS204
Figure
Large signal frequency response
Figure
Output voltage swing versus load resistance
Figure Total input noise versus frequency Figure Amplitude response
Figure Amplitude response ±1dB ripple)
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LS204
Application information active low-pass filters
Application information active low-pass filters
Butterworth
Butterworth "maximally flat" amplitude response filter (Figure 11). Butterworth filters used filtering signals data acquisition systems prevent aliasing errors samples-data applications general purpose low-pass filtering. cut-off frequency, frequency which amplitude response down attenuation rate beyond cut-off frequency octave frequency, where order (number poles) filter. Other characteristics:
Flattest possible amplitude response Excellent gain accuracy frequency passband
Bessel
Bessel type "linear phase" filter. Because their linear phase characteristics, these filters approximate constant time delay over limited frequency range. Bessel filters pass transient waveforms with minimum distortion. They also used provide time delays pass filtering modulated waveforms "running average" type filter. maximum phase shift radians,
where order (number poles) filter. cut-off frequency, defined frequency which phase shift half this value. accurate delay, cut-off frequency should twice maximum signal frequency. Table used obtain frequency filter. Table frequency filter
Poles frequency 0.77 Poles 0.67 Poles 0.57 Poles 0.50
Other characteristics:
Selectivity great Chebyschev Butterworth Very little overshoot response step inputs Fast rise time
Chebyschev
Chebyschev filters have greater selectivity than either Bessel Butterworth expense ripple passband (Figure 12). Chebyschev filters normally designed with peak-to-peak ripple values from
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Application information active low-pass filters
LS204
Increased ripple passband allows increased attenuation above cut-off frequency. cut-off frequency defined frequency which amplitude response passes through specified maximum ripple band enters stop band. Other characteristics:
Greater selectivity Very non-linear phase response High overshoot response step inputs
Table shows typical overshoot setting time response pass filters step input. Table Overshoot setting time response pass filters step input
Number poles Peak overshoot Overshoot Settling time final value) ±0.1% ±0.01%
Butterworth
1.1Fc sec. 1.7Fc sec. 1.9Fc sec. 2.8/Fc 3.8/Fc 1.7/Fc 2.4/Fc 3.9S/Fc 5.0S/Fc 3.1/Fc 5.1/Fc 7.1/Fc 0.8/Fc 1.0/Fc 1.3/Fc 1.6/Fc 1.1/Fc 3.0/Fc 5.9/Fc 8.4/Fc 1.6/Fc 4.8/Fc 8.2/Fc 11.6/Fc 1.4/Fc 1.8/Fc 2.1/Fc 2.3/Fc 1.6/Fc 5.4/Fc 10.4/Fc 16.4/Fc 2.7/Fc 8.4/Fc 16.3/Fc 24.8/Fc 1.7/Fc 2.4/Fc 2.7/Fc 3.2/Fc
Bessel
Chebyschev (ripple ±0.25dB)
Chebyschev (ripple ±1dB)
Design order active pass filter (Sallen configuration unity gain op-amp)
fixed have (see Figure 13):
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LS204 Figure Filter configuration
Application information active low-pass filters
Vout
Three parameters needed characterize frequency phase response order active filter:
gain (Gv), damping factor factor )1), cut-off frequency (Fc).
higher order response obtained with series order sections. simple section introduced when filter required. choice factor) determines filter response (see Table Table Filter response factor
Filter response
Cut-off frequency (Fc)
Bessel
Frequency which phase shift -90°C
Butterworth
Frequency which
Chebyschev
Frequency which amplitude response passes through specified max. ripple band enters stop bank.
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Application information active low-pass filters
LS204
Example
Figure order low-pass filter (Butterworth) with unity gain configuration
circuit Figure obtain:
1.354 6.33nF 0.421 1.97nF 1.753 8.20nF 0.309 1.45nF 3.325 15.14nF
attenuation filter better than kHz. same method, referring Table Figure used design high-pass filters. this case damping factor found taking reciprocal numbers Table obtain:
25.5k 0.354 75.6k 0.421 18.2k 1.753 103k 0.309 9.6k 3.325
Figure order high-pass filter (Butterworth) with unity gain configuration
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LS204 Table
Order 1.336 1.354 1.392
Application information active low-pass filters Damping factor low-pass Butterworth filters
0.707 0.202 0.92 0.421 0.966 0.488 0.98 1.41 3.54 1.08 1.75 1.035 1.53 1.02 0.38 0.309 0.707 0.623 0.83 2.61 3.235 1.414 1.604 1.20 0.259 0.222 0.556 3.86 4.49 1.80 0.195 5.125
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Package information
LS204
Package information
order meet environmental requirements, STMicroelectronics offers these devices ECOPACK® packages. These packages have lead-free second level interconnect. category second level interconnect marked package inner label, compliance with JEDEC Standard JESD97. maximum ratings related soldering conditions also marked inner label. ECOPACK STMicroelectronics trademark. ECOPACK specifications available www.st.com.
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LS204
Package information
DIP8 package information
Figure DIP8 package mechanical drawing
Table
DIP8 package mechanical data
Dimensions
Ref. Min. 2.92 0.38 2.92 0.36 1.14 0.20 9.02 7.62 6.10
Millimeters Typ. Max. 5.33 0.015 3.30 0.46 1.52 0.25 9.27 7.87 6.35 2.54 7.62 10.92 3.30 3.81 0.115 4.95 0.56 1.78 0.36 10.16 8.26 7.11 0.115 0.014 0.045 0.008 0.355 0.300 0.240 Min.
Inches Typ. Max. 0.210
0.130 0.018 0.060 0.010 0.365 0.310 0.250 0.100 0.300
0.195 0.022 0.070 0.014 0.400 0.325 0.280
0.430 0.130 0.150
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Package information
LS204
SO-8 package information
Figure SO-8 package mechanical drawing
Table
SO-8 package mechanical data
Dimensions
Ref. Min. 0.25 0.40 0.10 1.25 0.28 0.17 4.80 5.80 3.80
Millimeters Typ. Max. 1.75 0.25 0.004 0.049 0.48 0.23 4.90 6.00 3.90 1.27 0.50 1.27 0.10 0.010 0.016 5.00 6.20 4.00 0.011 0.007 0.189 0.228 0.150 Min.
Inches Typ. Max. 0.069 0.010
0.019 0.010 0.193 0.236 0.154 0.050 0.020 0.050 0.004 0.197 0.244 0.157
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LS204
Ordering information
Ordering information
Table Order codes
Temperature range Package DIP8 0°C, +70°C SO-8 DIP8 -40°C, +105°C SO-8 SO-8 (Automotive grade) Packing Tape Tape Tape reel Tape Tape Tape reel Tape Tape reel Marking LS204CN 204C LS204IBN 204I 204IYD
Order code LS204CN LS204CD LS204CDT LS204IN LS204ID LS204IDT LS204IYD(1) LS204IYDT(1)
Qualification characterization according Q100 Q003 equivalent, advanced screening according Q001 equivalent on-going.
Revision history
Table
Date 29-Nov-2001 4-Jun-2008
Document revision history
Revision Initial release. Updated document format. Added automotive grade order codes. Changes
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LS204
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