March 2008 Rev 4 1/12
12
MC33079
Low noise quad operational amplifier
Features
■Low voltage noise: 4.5 nV/√Hz
■High gain bandwidth product: 15 MHz
■High slew rate: 7 V/µs
■Low distortion: 0.002%
■Large output voltage swing: +14.3 V/-14.6 V
■Excellent frequency stability
■ESD protection 2 kV
■Macromod el inc lud ed in this specification
Description
The MC33079 is a monolithic quad operational
amplifier particularly well suited for audio
applications.
It offers low voltage noise (4.5 nV/√Hz) and high
frequency pe rfor m an ce (15 MHz gain bandw idth
product, 7 V/µs slew rate).
In addition th e MC33079 has a v e ry low d istortion
(0.002%) and excellent phase/gain margins.
The output stage allows a large output voltage
swing and symmetrical source and sink currents.
DIP14
(Plastic package)
SO-14
(Plastic micropackage)
Pin connections
(top view)
Inverting Input 2
Non-inverting Input 2
Non-inverting Input 1
CC
V
-
CC
V
1
2
3
4
8
5
6
7
9
10
11
12
13
14
+
Output 3
Output 4
Non-inverting Input 4
Inverting Input 4
Non-inverting Input 3
Inverting Input 3
-
+
-
+
-
+
-
+
Output 1
Inverting Input 1
Output 2
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Schematic diagram (1/4 MC33079) MC33079
2/12
1 Schematic diagram (1/4 MC33079)
Figure 1. Schematic diagram (1/4 MC33079)
Inverting
Input
Non-inverting
Input
V
CC
Output
V
CC
MC33079 Absolute maximum ratings and opera ting conditions
3/12
2 Absolute maximum ratings and operating conditions
Table 1. Absolute maximum ratings (AMR)
Symbol Parameter Value Unit
VCC Supply voltage ±18 or +36 V
Vid Differential input voltage (1)
1. Either or both input voltages must not exceed the magnitude of VCC+ or VCC-.
±30 V
ViInput voltage (1) ±15 V
Output short-circuit duration Infinite s
TjJunction temperature +150 °C
Tstg Storage temperature -65 to +150 °C
Rthja
Thermal resistance junction to ambient (2) (3)
DIP14
SO-14
2. Short-circuits can cause excessive heating. Destructive dissipation can result from simultaneous short-
circuits on all amplifiers.
3. Rth are typical values.
80
105 °C/W
Rthjc
Thermal resistance junction to case (2) (3)
DIP14
SO-14 33
31 °C/W
ESD
HBM: human body model(4)
4. Human body model: 100 pF discharged through a 1.5 kΩ resistor between two pins of the device, done for
all couples of pin combinations with other pins floating.
2kV
MM: mach ine model(5)
5. Machine model: a 200 pF cap is charged to the specified voltage, then discharged directly between two
pins of the device with no external series resistor (internal resistor < 5 Ω), done for all couples of pin
combinations with other pins floating.
200 V
CDM: charged device model(6)
6. Charged device model: all pins plus package are charged together to the specified voltage and then
discharged directly to the ground.
1.5 kV
Table 2. Operating conditions
Symbol Parameter Value Unit
VCC Supply voltage ±2.5 to ±15 V
Toper Operating free-air temperature range -40 to 105 °C
Vicm Input common mode voltage range (ΔVio= 5mV, Vo= 0V) ±13 to ±14 V
Electrical characteristics MC33079
4/12
3 Electrical characteristics
Table 3. VCC+ = +15V, VCC- = -15V, Tamb = 25°C (unless otherwise specified)
Symbol Parameter Min. Typ. Max. Unit
Vio Input offset voltage (Vo = 0V, Vic = 0V)
Tmin ≤ T
amb ≤ T
max
2.5
3.5 mV
DVio Input offset voltage drift
Vo = 0V, Vic = 0V, Tmin ≤ T
amb ≤ T
max 2µV/°C
Iio Input offset current (Vo = 0V, Vic = 0V)
Tmin ≤ T
amb ≤ T
max
10 150
175 nA
Iib Input bias current (Vo = 0V, Vic = 0V)
Tmin ≤ T
amb ≤ T
max
250 750
800 nA
Avd Large signal voltage gain (RL = 2kΩ, Vo = ±10V)
Tmin ≤ T
amb ≤ T
max
90
85 100 dB
±Vopp
Output voltage swing (Vid = ±1V)
RL = 600Ω
RL = 600Ω
RL = 2.0kΩ
RL = 2.0kΩ
RL = 10kΩ
RL = 10kΩ
13.2
13.5
12.2
-12.7
14
-14.2
14.3
-14.6
-13.2
-14
V
CMR Common-mode rejection ratio (Vic = ±13V) 80 100 dB
SVR Supply voltage rejection ratio (VCC+ / VCC-= +15V / -15V to +5V / -5 V) 80 105 dB
Io
Output short-circuit current (Vid = ±1V, output to ground)
Source
Sink 15
20 29
37 mA
ICC Supply current (Vo = 0V, all amplifiers)
Tmin ≤ T
amb ≤ T
max
810
12 mA
SR Slew rate (Vi = -10V to +10V, RL = 2kΩ, CL = 100pF, AV = +1) 5 7 V/µs
GBP Gain bandwidth product (RL = 2kΩ, CL = 100pF, f = 100kHz) 10 15 MHz
B Unity gain bandwidth (open loop) 9 MHz
Am
Gain margin (RL = 2kΩ)
CL = 0pF
CL = 100pF -11
-6 dB
φmPhase margin (RL = 2kΩ)
CL = 0pF
CL = 100pF 55
30 Degrees
enEquivalent input noise voltage (RS = 100Ω, f = 1kHz) 4.5
inEquivalent input noise current (f = 1kHz) 0.5
nV
Hz
------------
pA
Hz
------------
MC33079 Electrical characteristics
5/12
THD Total harmonic distortion (RL = 2kΩ, f = 20Hz to 20kHz, Vo = 3Vrms,
AV = +1) 0.002 %
VO1/VO2 Channel separation (f = 20Hz to 20kHz) 120 dB
FPB Full power bandwidth (Vo = 27Vpp, RL = 2kΩ, THD ≤ 1%) 120 kHz
ZoOutput impedance (Vo = 0V, f = 9MHz) 37 Ω
RiInput resistance (Vic = 0V) 175 kΩ
CiInput capacitance (Vic = 0V) 12 pF
Table 3. VCC+ = +15V, VCC- = -15V, Tamb = 25°C (unless otherwise specified) (continued)
Symbol Parameter Min. Typ. Max. Unit
Electrical characteristics MC33079
6/12
Figure 2. Supply current vs. supply voltage Figure 3. Output voltage vs. supply voltage
0
2
4
6
8
10
0 5 10 15 20 25 30
Supply Voltage (V)
Supply Current (mA)
-15
-10
-5
0
5
10
15
051015
Supply Voltage ( V)
Output Voltage (V)
Vid = ±1V
RL = 600Ω
Figure 4. Equivalent input noise voltage vs.
frequency Figure 5. Output short circuit current vs.
output voltage
0
2
4
6
8
10
0.01 0.1 1 10 100 1000
Frequency (kHz)
Equivalent Input Noise Voltage (nV/VHz)
VCC = ±15V, Av = 100
Rs = 100Ω, Tamb = 25°C
-40
-20
0
20
40
60
0102030
Ou t put Voltag e ( V)
Output Short Circuit Current (mA)
VCC = 0/30V
Tamb = 25°C
Figure 6. Output voltage vs. supply voltage Figure 7. THD + noise vs. frequency
-15
-10
-5
0
5
10
15
051015
Supp ly Volta g e (V)
Output Voltage (V)
Vid = ±1V
RL = 2kΩ
0
0.005
0.01
0.01 0.1 1 10 100
Frequency ( kHz)
THD+Noise (%)
RL = 2kΩ, Vo = 3Vrms
VCC = ±15V gain = 10
gain = 1
MC33079 Electrical characteristics
7/12
Figure 8. Voltage gain and phase vs.
frequency Figure 9. T otal harmonic distortion vs. output
voltage
-40
-20
0
20
40
60
10 100 1000 10000 100000
Frequen cy ( kHz)
Gain (dB)
-120
-60
0
60
120
180
Phase (Deg)
gain
phase
RL = 2kΩ, CL = 100pF
VCC = ±15V, Av = -100
0.000
0.005
0.010
0.015
0.020
0123456789
Vout (Vrms)
THD+Noise (%)
RL = 2kΩ, f = 1kHz
VCC = ±15V, Av = 10
Package information MC33079
8/12
4 Package information
In order to meet environmental requirements, ST offers these devices in ECOPACK®
packages. These packages have a lead-free second level interconnect. The category of
second level interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratin gs related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at: www.st.com.
4.1 DIP14 package information
Figure 10. DIP14 package mechanical drawing
Table 4. DIP14 package mechanical data
Ref.
Dimensions
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
a1 0.51 0.020
B 1.39 1.65 0.055 0.065
b0.5 0.020
b1 0.25 0.010
D200.787
E8.5 0.335
e 2.54 0.100
e3 15.24 0.600
F 7.1 0.280
I 5.1 0.201
MC33079 Package information
9/12
4.2 SO-14 package information
Figure 11. SO-14 package mechanical drawing
L3.3 0.130
Z 1.27 2.54 0.050 0.100
Table 4. DIP14 package mechanical data
Table 5. SO-14 package mechanical data
Ref.
Dimensions
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A1.750.068
a1 0.1 0.2 0.003 0.007
a2 1.65 0.064
b 0.35 0.46 0.013 0.018
b1 0.19 0.25 0.007 0.010
C0.5 0.019
c1 45° (typ.)
D 8.55 8.75 0.336 0.344
E 5.8 6.2 0.228 0.244
e 1.27 0.050
e3 7.62 0.300
F 3.8 4.0 0.149 0.157
Package information MC33079
10/12
G 4.6 5.3 0.181 0.208
L 0.5 1.27 0.019 0.050
M0.680.026
S 8° (max.)
Table 5. SO-14 package mechanical data
MC33079 Ordering information
11/12
5 Ordering information
6 Revision history
Table 6. Order codes
Order code Tem perature range Package Packaging Marking
MC33079N -40°C to +105°C DIP14 Tube MC33079N
MC33079D
MC33079DT SO-14 Tube or
Tape & reel 33079
MC33079YD(1)
MC33079YDT(1)
1. Qualification and characterization according to AEC Q100 and Q003 or equivalent, advanced screening
according to AEC Q001 & Q 002 or equivalent are on-going.
-40°C to + 105°C SO-14
(Automotive grade) Tube or
Tape & reel 33079Y
Table 7. Document revision history
Date Revision Changes
10-Oct-2001 1 Initial release.
23-Jun-2005 2 PPAP references inserte d in the datasheet. See order codes table.
21-Nov-2007 3
Added Rthja, Rthjc and ESD values in Table 1: Absolute maximum
ratings (AMR).
Added footnote fo r automotive grade order codes in order codes
table.
Updated document format.
13-Mar-2008 4 Corrected value for ESD HBM pa rameter.
Removed section on Macromodel.
MC33079
12/12
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