LS404 STMicroelectronics, LS404 Datasheet

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LS404

Manufacturer Part Number
LS404
Description
Low-noise bipolar op-amps
Manufacturer
STMicroelectronics
Datasheet

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LS404CN
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DESCRIPTION
The LS404 is a high performance quad operation-
al amplifier with frequency and phase compensa-
tion built into the chip. The internal phase compen-
sation 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).
The patented input stage circuit allows small input
signal swings below the negative supply voltage
and prevents phase inversion when the inputs are
over drivers.
ORDER CODE
N = Dual in Line Package (DIP)
D = Small Outline Package (SO) - also available in Tape & Reel (DT)
LS404C
LS404I
LS404M
Example : LS204CN
Part Number Temperature Range
November 2001
SINGLE OR SPLIT SUPPLY OPERATION
LOW POWER CONSUMPTION
SHORT CIRCUIT PROTECTION
LOW DISTORTION, LOW NOISE
HIGH GAIN-BANDWIDTH PRODUCT
HIGH CHANNEL SEPARATION
-40°C, +105°C
-55°C, +125°C
0°C, +70°C
N
Package
D
QUAD OPERATIONAL AMPLIFIER
PIN CONNECTIONS (top view)
HIGH PERFORMANCE
(Plastic Micropackage)
(Plastic Package)
DIP14
SO14
N
D
LS404
1/11

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LS404 Summary of contents

Page 1

... LOW DISTORTION, LOW NOISE HIGH GAIN-BANDWIDTH PRODUCT HIGH CHANNEL SEPARATION DESCRIPTION The LS404 is a high performance quad operation- al amplifier with frequency and phase compensa- tion built into the chip. The internal phase compen- sation allows stable operation as voltage follower in spite of its high Gain-Bandwidth Product. ...

Page 2

... LS404 SCHEMATIC DIAGRAM (1/4 LS404) Inverting input ABSOLUTE MAXIMUM RATINGS Symbol V Supply voltage CC Input Voltage Differential Input Voltage id Operating Temperature Range T oper P Power Dissipation at T tot T Storage Temperature Range stg 2/11 Non-inverting input Parameter Positive Negative LS204C LS204I LS204I = 70°C amb Output ...

Page 3

... V L opp Slew Rate ( unity gain Supply Voltage Rejection Ratio SVR 100Hz ic Common Mode Rejection Ratio CMR V = 10V Channel Separation (f= 1kHz LS404I - LS404M Min. Typ. 1 10k ) 0.7 10k ) 0.08 23 100 100pF ...

Page 4

... LS404 4/11 ...

Page 5

... LS404 5/11 ...

Page 6

... LS404 APPLICATION INFORMATION: Active low-pass filter BUTTERWORTH The 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 ...

Page 7

... The choice of ’ ' (or Q factor) determines the filter response (see table 1 Frequency at which Phase Shift is -90°C ------ - ------ - 2 3 Frequency at which Gv = -3dB 2 1 ------ - ------ - 2 2 Frequency at which the amplitude response passes through specified max. ripple band and 2 1 ------ - ------ - enters the stop bank LS404 Vout Cuttoff Frequency fc 7/11 ...

Page 8

... LS404 In the circuit of figure 14, for fc = 3.4kHz and 10k , we obtain 1.354 --- - ----------- - = 6.33nF 0.421 --- - ----------- - = 1.97nF 1.753 --- - ----------- - = 8.20nF 0.309 --- - ----------- - = 1.45nF 3.325 --- - ----------- - = 15.14nF The attenuation of the filter is 30dB at 6.8kHz and better than 60dB at 15kHz ...

Page 9

... Figure 18 : Subsonic Filter (Gv = 0dB 22k Figure 19 : High Cut filter (Gv = 0dB) 10k 10k Vin 10k 10k 10k 86.1nF 161nF 10k Vout C2 Fc (Hz Vout 10k 10k 3.54nF 16.3nF 60nF 220nF Fc (Hz 0.68 22 0.47 30 0.33 55 0.22 100 0.10 C1 (nF) C2 (nF) 3.9 6.8 2.2 4.7 1.2 2.2 0.68 1.5 LS404 9/11 ...

Page 10

... LS404 PACKAGE MECHANICAL DATA 14 PINS - PLASTIC PACKAGE Dimensions Min. a1 0. 1.27 10/11 Millimeters Typ. Max. 1.65 0.5 0.25 20 8.5 2.54 15.24 7.1 5.1 3.3 2.54 Inches Min. Typ. Max. 0.020 0.055 0.065 0.020 0.010 0.787 0.335 0.100 0.600 0.280 0.201 0.130 0.050 0.100 ...

Page 11

... Millimeters Typ. Max. 1.75 0.2 1.6 0.46 0.25 0.5 45° (typ.) 8.75 6.2 1.27 7.62 4.0 5.3 1.27 0.68 8° (max.) STMicroelectronics GROUP OF COMPANIES © http://www.st.com Inches Min. Typ. Max. 0.069 0.004 0.008 0.063 0.014 0.018 0.007 0.010 0.020 0.336 0.344 0.228 0.244 0.050 0.300 0.150 0.157 0.181 0.208 0.020 0.050 0.027 LS404 11/11 ...

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