LOW POWER DUAL OPERATIONAL AMPLIFIERS
.INTERNALLYFREQUENCYCOMPENSATED
.LARGEDC VOLTAGEGAIN : 100dB
.WIDE BANDWIDTH (unity gain): 1.1MHz
(temperaturecompensated)
.VERY LOW SUPPLY CURRENT/OP (500µA) -
ESSENTIALLY INDEPENDENT OF SUPPLY
VOLTAGE
.LOW INPUT BIAS CURRENT : 20nA
(temperaturecompensated)
.LOW INPUT OFFSET CURRENT : 2nA
.INPUT COMMON-MODE VOLTAGE RANGE
INCLUDES GROUND
.DIFFERENTIAL INPUT VOLTAGE RANGE
EQUAL TO THE POWER SUPPLYVOLTAGE
.LARGE OUTPUT VOLTAGE SWING 0V TO
(VCC –1.5V)
DESCRIPTION
Thiscircuit consistsof two independent,high gain,
internally frequency compensated which were
designed specifically for automotive and industrial
controlsystem.It operatesfrom asinglepowersup-
ply over a wide range of voltages. The low power
supplydrain is independentof the magnitudeof the
powersupplyvoltage.
Applicationareas include transduceramplifiers, dc
gainblocksandalltheconventionalop-ampcircuits
whichnowcanbemoreeasilyimplementedinsingle
power supply systems. For example, thesecircuits
can be directly supplied with off the standard+ 5V
whichis usedinlogicsystemsandwilleasilyprovide
the required interface electronics without requiring
any additionalpower supply.
In the linear modethe input common-mode voltage
range includes ground and the output voltage can
also swing to ground, even though operated from
only a single powersupply voltage.
N
DIP8
(PlasticPackage)
ORDER CODES
Part
Number Temperature
Range Package
NDP
LM2904 -40oC, +125oC•••
Example : LM2904D
D
SO8
(Plastic Micropackage)
LM2904
January 1999
1
2
3
45
6
7
8
-
+
-
+
1 - Output 1
2 - Inverting input 1
3 -Non-inverting input1
4-V
CC-
5 - Non-inverting input 2
6 - Invertinginput 2
7 - Ouput 2
8-V
CC+
PIN CONNECTIONS (top view)
P
TSSOP8
(Thin Shrink Small Outline Package)
1/12
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter LM2904 Unit
VCC Supply Voltage +32 V
ViInput Voltage –0.3 to +32 V
Vid Differential Input Voltage +32 V
Output Short-circuit Duration - (note 2)
Ptot Power Dissipation 500 mW
Iin Input Current - (note 1) 50 mA
Toper Operating Free-air Temperature Range -40 to +125 oC
Tstg Storage Temperature Range –65 to +150 oC
6µA4µA100µA
Q2 Q3
Q4Q1
Inverting
input
Non-inverting
input
Q8 Q9
Q10
Q11
Q12
50µA
Q13
Output
Q7
Q6
Q5
RSC
VCC
CC
GND
SCHEMATIC DIAGRAM (1/2 LM2904)
LM2904
2/12
ELECTRICAL CHARACTERISTICS
VCC+=+5V, VCC–=Ground, VO=1.4V, Tamb =25
o
C (unlessotherwise specified)
Symbol Parameter Min. Typ. Max. Unit
Vio Input Offset Voltage - (note 3)
Tamb =25
o
C
T
min. ≤Tamb ≤Tmax.27
9
mV
Iio Input Offset Current
Tamb =25
o
C
T
min. ≤Tamb ≤Tmax.230
40
nA
Iib Input Bias Current - (note 4)
Tamb =25
o
C
T
min. ≤Tamb ≤Tmax.20 150
200
nA
Avd Large Signal Voltage Gain
(VCC = +15V, RL=2kΩ,V
O= 1.4V to 11.4V)
Tamb =25
o
C
T
min. ≤Tamb ≤Tmax.50
25 100
V/mV
SVR Supply Voltage Rejection Ratio (RS= 10kΩ)
(VCC+= 5 to 30V)
Tamb =25
o
C
T
min. ≤Tamb ≤Tmax.65
65 100
dB
ICC Supply Current, all Amp, no Load
VCC = +5V, Tmin. ≤Tamb ≤Tmax.
VCC = +30V, Tmin. ≤Tamb ≤Tmax.0.7 1.2
2
mA
Vicm Input Common Mode Voltage Range
(VCC = +30V) - (note 6)
Tamb =25
o
C
T
min.≤Tamb ≤Tmax.0
0VCC+–1.5
VCC+–2
V
CMR Common-mode Rejection Ratio (RS= 10kΩ)
Tamb =25
o
C
T
min. ≤Tamb ≤Tmax.70
60 85 dB
Isource Output Source Current
(VCC = +15V, Vo= 2V, Vid = +1V) 20 40 60 mA
Isink Output Current Sink (Vid = -1V)
VCC = +15V, VO=2V
V
CC = +15V, VO= +0.2V 10
12 20
50 mA
µA
VOPP Output Voltage Swing (RL=2kΩ)
T
amb =25
o
C
T
min. ≤Tamb ≤Tmax.0
0VCC+–1.5
VCC+–2
V
VOH High Level Output Voltage (VCC+= 30V)
Tamb =25
o
CR
L
=2kΩ
T
min.≤Tamb ≤Tmax.
Tamb =25
o
CR
L
= 10kΩ
Tmin. ≤Tamb ≤Tmax.
26
26
27
27
27
28
V
VOL Low Level Output Voltage (RL= 10kΩ)
Tamb =25
o
C
T
min.≤Tamb ≤Tmax. 520
20
mV
SR Slew Rate (VCC = 15V, VI= 0.5 to 3V, RL=2kΩ,C
L=
100pF, unity gain) 0.3 0.6 V/µs
GBP Gain Bandwidth Product
(VCC = 30V, f = 100kHz,
Vin = 10mV, RL=2kΩ,C
L= 100pF) 0.7 1.1
MHz
THD Total Harmonic Distortion
(f = 1kHz, Av= 20dB, RL=2kΩ,V
CC = 30V,
CL= 100pF, VO=2PP)0.02 %
LM2904
3/12
ELECTRICAL CHARACTERISTICS (continued)
Symbol Parameter Min. Typ. Max Unit
DVio Input Offset Voltage Drift 7 30 µA/oC
DIio Input Offset Current Drift 10 300 pA/oC
VO1/VO2 Channel Separation (note 5)
1kHz ≤f ≤20kHz 120 dB
Notes : 1. This input current only exist when the voltage at any of the input leads is driven negative. It is due to the collec-
tor-base junction of the input PNP transistor becoming forward biased and thereby acting as input diode clamps.
In addition to this diode action, there is also NPN parasitic action on the IC chip. This transistor action can cause
the output voltages of the Op-amps to go to the VCC voltage level (or to ground for a large overdrive) for the time
duration that an input is driven negative.
This is not destructive and normal output will set up again for input voltage higher than –0.3V.
2. Short-circuits from the output to VCC can cause excessive heating if VCC+> 15V. The maximum output current is
approximatively 40mA independent of the magnitude of VCC. Destructive dissipation can result from simultaneous
short-circuits on all amplifiers.
3. VO=1.4V, RS=0Ω,5V<V
CC+<30V, 0 < Vic <VCC+– 1.5V.
4. The direction of the input current is out of the IC. This current is essentially constant, independent of the state of
the output so no loading change exists on the input lines.
5. Due to the proximity of external components insure that coupling is not originating via stray capacitance between
these external parts. This typically can be detected as this type of capacitance increases at higher frequences.
6. The input common-mode voltage of either input signal voltage should not be allowed to go negative by more than
0.3V. The upper end of the common-mode voltage range is VCC+– 1.5V.
But either or both inputs can go to +32V without damage.
VOLTAGE GAIN (dB)
OPEN LOOP FREQUENCYRESPONSE (NOTE 3)
1.0 10 100 1k 10k 100k 1M 10M
VCC =+10to+15V&
FREQUENCY(Hz)
10M Ω
VIVCC/2
VCC = 30V&
0.1µF
VCC VO
-
+
-55
CTamb +125
C
140
120
100
80
60
40
20
0
-5
5
CTamb +125
C
INPUT
VOLTAGE (V)
OUTPUT
VOLTAGE (V)
VOLAGE FOLLOWER PULSE RESPONSE
010203040
TIME (µs)
RL 2 kΩ
VCC = +15V
4
3
2
1
0
3
2
1
LARGE SIGNALFREQUENCYRESPONSE
FREQUENCY (Hz)
1k 10k 100k 1M
OUTPUT SWING (Vpp)
+7V 2k Ω
1k Ω100k Ω
+15V
VO
-
+
VI
20
15
10
5
0
OUTPUT CHARACTERISTICS
OUTPUT SINKCURRENT (mA)
0,001 0,01 0,1 1 10 100
OUTPUT VOLTAGE (V)
VCC = +5V
VCC = +15V
VCC = +30V
-
IO
VO
Tamb =+25
C
v
cc/2
vcc
+
10
1
0.1
0.01
LM2904
4/12
OUTPUT VOLTAGE REFERENCED
TO V
CC+(V)
OUTPUT CHARACTERISTICS
0,01 0,1 1 10 100
0,001
Independent ofVCC
Tamb =+25 C
+
-
V
CC
VO
IO
VCC /2
OUTPUT SOURCE CURRENT (mA)
8
7
6
5
4
3
2
1
OUTPUT VOLTAGE (mV)
VOLTAGE FOLLOWER PULSSE RESPONSE
(SMALL SIGNAL)
012345678
Input
Tamb =+25
C
V
CC =30V
Output
eO
el50pF
+
-
TIME (µs)
500
450
400
350
300
250
INPUT CURRENT (mA)
INPUT CURRENT (Note 1)
-55 -35 -15 5 25 45 65 85 105 125
VI=0V
V
CC =+30V
V
CC =+15V
V
CC =+5V
TEMPERATURE
(
C)
90
80
70
60
50
40
30
20
10
0
OUTPUT CURRENT (mA)
CURRENT LIMITING (Note 1)
-
+
IO
TEMPERATURE
(
C)
90
80
70
60
50
40
30
20
10
0-55 -35 -15 5 25 45 65 85 105 125
SUPPLY CURRENT (mA)
SUPPLY CURRENT
0102030
T
amb =-55 C
V
CC
mA ID
-
+
Tamb = 0 C to +125 C
POSITIVE SUPPLYVOLTAGE (V)
4
3
2
1
INPUT VOLTAGE (V)
INPUT VOLTAGE RANGE
0 5 10 15
POWER SUPPLYVOLTAGE (–V)
NØgative
Positive
15
10
5
LM2904
5/12
010203040
POSITIVE SUPPLYVOLTAGE (V)
VOLTAGE GAIN (dB)
160
120
80
40
L
R=20k
Ω
L
R=2k
Ω
-55-35-15 5 25 45 65 85 105 125
TEMPERATURE ( C)
POWER SUPPLY REJECTION RATIO (dB)
SVR
115
110
105
100
95
90
85
80
75
70
65
60 -55-35-15 5 25 45 65 85 105 125
TEMPERATURE ( C)
COMMON MODE REJECTION RATIO (dB)
115
110
105
100
95
90
85
80
75
70
65
60
0102030
POSITIVE SUPPLYVOLTAGE (V)
INPUT CURRENT (nA)
100
75
50
25 amb
T=+25 C
0102030
POSITIVE SUPPLYVOLTAGE (V)
VOLTAGE GAIN (dB)
160
120
80
40
L
R = 20k Ω
L
R=2k
Ω
-55-35-15 5 25 45 65 85 105 125
TEMPERATURE ( C)
GAIN BANDWIDTHPRODUCT (MHz)
CC
V=15V
1.5
1.35
1.2
1.05
0.9
0.75
0.6
0.45
0.3
0.15
0
LM2904
6/12
TYPICAL APPLICATIONS (single supply voltage) VCC =+5V
DC
1/2
LM2904
~
02V
PP
R
10kΩ
L
Co
eo
R
6.2kΩ
B
C1
0.1µF
eI
V
CC
(as shown A = 11)
V
A=1+
R2
R1
V
R1
100kΩR2
1MΩ
CI
R3
1MΩR4
100kΩ
R5
100kΩ
C2
10µF
AC COUPLED NON-INVERTING AMPLIFIER
1/2
LM2904
~
02V
PP
R
10kΩ
L
Co
eo
R
6.2kΩ
B
R
100kΩ
f
R1
10kΩ
CI
eIV
CC
R2
100kΩ
C1
10µF
R3
100kΩ
A=-
R
R1
Vf
(as shown A = -10)
V
AC COUPLED INVERTING AMPLIFIER
R1
10kΩ
R2
1MΩ
1/2
LM2904
10kΩ
eI
eO+5V
eO(V)
(mV)
0
AV=1+ R2
R1
(As shown = 101)AV
NON-INVERTING DC AMPLIFIER
1/2
LM2904 eO
e4
e3
e2
e1100kΩ
100kΩ
100kΩ
100kΩ
100kΩ
100kΩ
eo=e
1+e
2-e
3-e
4
where(e1+e
2
)≥(e3+e
4
)
to keep eo≥0V
DC SUMMING AMPLIFIER
LM2904
7/12
1/2
LM2904
R1
100kΩ
R2
100kΩR4
100kΩ
R3
100kΩ
+V2
+V1 Vo
1/2
LM2904
if R1=R
5andR3=R
4=R6=R
7
e
o=[1+2R1
R2](e2−e1)
As showneo=101(e
2-e
1).
HIGH INPUT Z, DC DIFFERENTIAL
AMPLIFIER
IB
2N 929
0.001µF
IB
3MΩ
IB
eo
II
eIIB
IB
Input current compensation
1.5MΩ
1/2
LM2904
1/2
LM2904
USING SYMMETRICAL AMPLIFIERS TO
REDUCE INPUT CURRENT
R3
100kΩ
eO
R1
100kΩ
e1
1/2
LM2904
R7
100kΩ
R6
100kΩ
R5
100kΩ
e2
R2
2kΩGain adjust
R4
100kΩ
1/2
LM2904
1/2
LM2904
if R1=R5andR3=R4=R6=R
7
e
o=[1+2R1
R2](e2−e1)
As shown eo=101(e
2-e1)
HIGH INPUT Z ADJUSTABLE GAIN DC
INSTRUMENTATION AMPLIFIER
1/2
LM2904
IB
2N 929 0.001µF
IB
3R
3MΩ
IBInput curre nt
compens ation
eo
IB
eIZo
ZI
C
1µF2I
B
R
1MΩ
2I
B
1/2
LM2904
1/2
LM2904
LOW DRIFT PEAK DETECTOR
LM2904
8/12
1/2
LM2904
R8
100kΩC3
10µF
R7
100kΩ
R5
470kΩ
C1
330pF
V
o
V
CC
R6
470kΩ
C2
330pF
R4
10MΩ
R1
100kΩ
R2
100kΩ
+V1
R3
100kΩ
1/2
LM2904
1/2
LM2904
Fo=1kHz
Q=50
A
V= 100(40dB)
ACTIVE BAND-PASS FILTER
LM2904
9/12
PM-DIP8.EPS
PACKAGE MECHANICAL DATA
8 PINS - PLASTIC DIP
Dimensions Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A 3.32 0.131
a1 0.51 0.020
B 1.15 1.65 0.045 0.065
b 0.356 0.55 0.014 0.022
b1 0.204 0.304 0.008 0.012
D 10.92 0.430
E 7.95 9.75 0.313 0.384
e 2.54 0.100
e3 7.62 0.300
e4 7.62 0.300
F 6.6 0260
i 5.08 0.200
L 3.18 3.81 0.125 0.150
Z 1.52 0.060
DIP8.TBL
LM2904
10/12
PM-SO8.EPS
PACKAGE MECHANICAL DATA
8 PINS - PLASTIC MICROPACKAGE (SO)
Dimensions Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A 1.75 0.069
a1 0.1 0.25 0.004 0.010
a2 1.65 0.065
a3 0.65 0.85 0.026 0.033
b 0.35 0.48 0.014 0.019
b1 0.19 0.25 0.007 0.010
C 0.25 0.5 0.010 0.020
c1 45o(typ.)
D 4.8 5.0 0.189 0.197
E 5.8 6.2 0.228 0.244
e 1.27 0.050
e3 3.81 0.150
F 3.8 4.0 0.150 0.157
L 0.4 1.27 0.016 0.050
M 0.6 0.024
S8
o
(max.)
SO8.TBL
LM2904
11/12
PACKAGE MECHANICAL DATA
8 PINS - THIN SHRINK SMALL OUTLINE PACKAGE
Dim. Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A 1.20 0.05
A1 0.05 0.15 0.01 0.006
A2 0.80 1.00 1.05 0.031 0.039 0.041
b 0.19 0.30 0.007 0.15
c 0.09 0.20 0.003 0.012
D 2.90 3.00 3.10 0.114 0.118 0.122
E 6.40 0.252
E1 4.30 4.40 4.50 0.169 0.173 0.177
e 0.65 0.025
k0
o8
o0
o8
o
l 0.50 0.60 0.75 0.09 0.0236 0.030
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifi-
cations mentioned in this publication are subject to change without notice. This publication supersedes and replaces all infor-
mation previously supplied. STMicroelectronics products are not authorized for use as critical components in life support de-
vices or systems without express written approval of STMicroelectronics.
The ST logo is a trademark of STMicroelectronics
1999 STMicroelectronics – Printed in Italy – All Rights Reserved
STMicroelectronics GROUP OF COMPANIES
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ORDERCODE:
PREVIEW
LM2904
12/12
