LM2904
LOW POWER DUAL OPERATIONAL AMPLIFIERS
..
.
.
.
..
.
.
INTERNALLY FREQUENCY COMPENSATED
LARGE DC VOLTAGE GAIN : 100dB
WIDE BANDWIDTH (unity gain) : 1.1MHz
(temperature compensated)
VERY LOW SUPPLY CURRENT/AMPLI
(500µA) - ESSENTIALLY INDEPENDENT OF
SUPPLY VOLTAGE
LOW INPUT BIAS CURRENT : 20nA
(temperature compensated)
LOW INPUT OFFSET CURRENT : 2nA
INPUT COMMON-MODE VOLTAGE RANGE
INCLUDES GROUND
DIFFERENTIAL INPUT VOLTAGE RANGE
EQUAL TO THE POWER SUPPLY VOLTAGE
LARGE OUTPUT VOLTAGE SWING 0V TO
(VCC – 1.5V)
N
DIP8
(Plastic Package)
D
SO8
(Plastic Micropackage)
ORDER CODES
LM2904
This circuit consists of two independent, high gain,
internally frequency compensated which were
designed specifically to operate from a single power
supply over a wide range of voltages. The low power
supply drain is independent of the magnitude of the
power supply voltage.
Application areas include transducer amplifiers, dc
gain blocks and all the conventionalop-amp circuits
which now can be more easilyimplemented in single
power supply systems. For example, these circuits
canbe directly operatedoff the standard+ 5V power
supply voltage which is used in logic systems and
will easily provide the required interface electronics
without requiring any additional power supply.
In the linear mode the input common-mode voltage
range includes ground and the output voltage can
also swing to ground, even though operated from
only a single power supply voltage.
The gain-bandwidth product is temperature
compensated.
October 1994
N
D
–40oC, +125oC
•
•
Example : LM2904D
PIN CONNECTIONS (top views)
1
8
2
-
3
+
7
4
1 - Output 1
2 - Inverting input 1
3 - Non-inverting input 1
4 - V CC
5
6
7
8
-
6
+
5
- Non-inverting input 2
- Inverting input 2
- Ouput 2
- VCC+
1/11
2904-01.EPS
DESCRIPTION
Package
Temperature
Range
2904-01.TBL
Part
Number
LM2904
SCHEMATIC DIAGRAM (1/2 LM2904)
V CC
6µA
4µA
100µA
Q5
Q6
CC
Inverting
input
Q2
Q3
Q1
Q7
Q4
R SC
Q11
Non-inverting
input
Output
Q13
Q10
Q8
Q12
Q9
50µA
2904-02.EPS
GND
ABSOLUTE MAXIMUM RATINGS
VCC
Parameter
Supply Voltage
Vi
Input Voltage
Vid
Differential Input Voltage
Output Short-circuit Duration - (note 2)
Unit
+32
V
–0.3 to +32
V
+32
V
Infinite
Ptot
Power Dissipation
500
mW
Iin
Input Current - (note 1)
50
mA
Toper
Tstg
2/11
Value
Operating Free-air Temperature Range
Storage Temperature Range
–40 to +125
o
C
–65 to +150
o
C
2904-02.TBL
Symbol
LM2904
ELECTRICAL CHARACTERISTICS
VCC+ = +5V, VCC– = Ground, VO = 1.4V, Tamb = 25oC (unless otherwise specified)
Iio
Iib
Avd
SVR
ICC
Vicm
CMR
IO
Isink
VOPP
VOH
VOL
SR
GBP
THD
Parameter
Input Offset Voltage - (note 3)
Tamb = 25oC
Tmin. ≤ Tamb ≤ Tmax.
Input Offset Current
o
Tamb = 25 C
Tmin. ≤ Tamb ≤ Tmax.
Input Bias Current - (note 4)
o
Tamb = 25 C
Tmin. ≤ Tamb ≤ Tmax.
Large Signal Voltage Gain
(VCC = +15V, RL = 2kΩ, VO = 1.4V to 11.4V)
o
Tamb = 25 C
Tmin. ≤ Tamb ≤ Tmax.
Supply Voltage Rejection Ratio (R S = 10kΩ)
(VCC+ = 5 to 30V)
Tamb = 25oC
Tmin. ≤ Tamb ≤ Tmax.
Supply Current, all Amp, no Load
VCC = +5V, Tmin. ≤ Tamb ≤ Tmax.
VCC = +30V, Tmin. ≤ Tamb ≤ Tmax.
Input Common Mode Voltage Range
(VCC = +30V) - (note 6)
Tamb = 25oC
Tmin. ≤ Tamb ≤ Tmax.
Common-mode Rejection Ratio (R S = 10kΩ)
Tamb = 25oC
Tmin. ≤ Tamb ≤ Tmax.
Output Short Circuit Current
(VCC = +15V, Vo = 2V, Vid = +1V)
Output Current Sink (Vid = -1V)
VCC = +15V, VO = 2V
VCC = +15V, VO = +0.2V
Output Voltage Swing (RL = 2kΩ)
Tamb = 25oC
Tmin. ≤ Tamb ≤ Tmax.
+
High Level Output Voltage (VCC = 30V)
o
R L = 2kΩ
Tamb = 25 C
Tmin. ≤ Tamb ≤ Tmax.
R L = 10kΩ
Tamb = 25oC
Tmin. ≤ Tamb ≤ Tmax.
Low Level Output Voltage (RL = 10kΩ)
Tamb = 25oC
Tmin. ≤ Tamb ≤ Tmax.
Slew Rate (V CC = 15V, VI = 0.5 to 3V, RL = 2kΩ,
o
CL = 100pF, Tamb = 25 C, unity gain)
Gain Bandwidth Product
(VCC = 30V, f = 100kHz, Tamb = 25oC,
Vin = 10mV, R L = 2kΩ, CL = 100pF)
Total Harmonic Distortion
(f = 1kHz, Av = 20dB, RL = 2kΩ, VCC = 30V,
CL = 100pF, Tamb = 25oC, VO = 2 PP)
Min.
Typ.
Max.
2
7
9
2
30
40
20
150
200
Unit
mV
nA
nA
V/mV
50
25
100
dB
65
65
100
mA
0.7
1.2
2
V
VCC+–1.5
VCC+–2
0
0
dB
70
60
85
20
40
10
12
20
50
mA
60
VCC+–1.5
VCC+–2
0
0
mA
µA
V
V
26
26
27
27
27
28
mV
5
20
20
V/µs
0.3
0.6
MHz
0.7
1.1
%
0.02
3/11
2904-03.TBL
Symbol
Vio
LM2904
Symbol
DVio
DIio
VO1/VO2
Min.
Typ.
7
10
Max.
30
300
Unit
µV/oC
pA/oC
dB
120
1. This input current only exist when the voltage at any of the input leads is driven negative. It is due to the collector-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 amplifi ers.
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 V CC+ – 1.5V.
But either or both inputs can go to +32V without damage.
2904-03.EPS
Notes :
Parameter
Input Offset Voltage Drift
Input Offset Current Drift
Channel Separation (note 5)
1kHz ≤ f ≤ 20kHz
2904-04.TBL
ELECTRICAL CHARACTERISTICS (continued)
4/11
2904-04.EPS
LM2904
5/11
LM2904
100
40
120
80
RL=2k Ω
POW
ERSUPPLY
REJECTION
RATIO
(dB)
0
10
20
30
POSITIVESUPPLYVOLTAGE(V)
6/11
115
110
SVR
105
100
95
90
85
80
75
70
65
60
-55-35-15 5 25456585105125
TEMPERATURE(°C)
2904-07.EPS
40
GAINBANDW
IDTHPRO
DUCT(MHz)
RL=20k Ω
2904-09.EPS
VOLTAGE
GAIN(dB)
160
25
Tamb=+25°C
0
10
20
30
POSITIVESUPPLYVOLTAGE(V)
COMM
ONMODEREJECTION
RATIO
(dB)
0
10
20
30
40
POSITIVESUPPLYVOLTAGE(V)
50
1.5
1.35
1.2
1.05
0.9
VCC = 15V
0.75
0.6
0.45
0.3
0.15
0
-55-35-15 5 2545 65 85105 125
TEMPERATURE(°C)
115
110
105
100
95
90
85
80
75
70
65
60
-55-35-15 5 254565 85105125
TEMPERATURE(°C)
2904-06.EPS
RL =2k Ω
80
75
2904-08.EPS
120
2904-10.EPS
INPUTCURRENT
(nA)
RL =20k Ω
2904-05.EPS
VOLTAGE
GAIN(dB)
160
LM2904
TYPICAL APPLICATIONS (single supply voltage) VC C = +5V DC
AC COUPLED INVERTING AMPLIFIER
R
100kfΩ
R1
CI 10kΩ
1/2
LM2904
eI ~
R2
VCC 100kΩ
AC COUPLED NON-INVERTING AMPLIFIER
R1
100kΩ
R
A V=- f
R1
(as shown AV =-10)
Co
RB
6.2kΩ
R3
100kΩ
A V=1 +R2
R1
(asshown AV =11)
C1
0.1µ F
2VPP
0
eo
R2
1MΩ
CI
RL
10kΩ
Co
1/2
LM2904
RB
6.2kΩ
eI ~
C1
10µ F
R3
1MΩ
2VPP
R
10kLΩ
R4
100kΩ
VCC
R5
100kΩ
NON-INVERTING DC AMPLIFIER
2904-12.EPS
2904-11.EPS
C2
10µ F
eo0
DC SUMMING AMPLIFIER
e1
AV=1 + R2
R1
(AsshownAV =101)
0
e2
100kΩ
e3
100kΩ
1/2
LM2904
eO
100kΩ
eI (mV)
e4
2904-13.EPS
R2
1MΩ
100kΩ
eO +5V
eO (V)
1/2
LM2904
100kΩ
eo = e1 + e2 - e3 - e 4
where (e 1 + e2) ≥ (e3 + e 4)
to keep eo ≥ 0V
2904-14.EPS
10kΩ
R1
10kΩ
100kΩ
7/11
LM2904
HIGH INPUT Z, DC DIFFERENTIAL
AMPLIFIER
USING SYMMETRICAL AMPLIFIERS TO
REDUCE INPUT CURRENT
1/2
II
eI
R4
100kΩ
R2
100kΩ
R1
100kΩ
1/2
LM2904
IB
2N929
0.001µF
R3
100kΩ
1/2
LM2904
+V1
+V2
eo
IB LM2904
IB
IB
Vo
3MΩ
IB
1.5MΩ
if R 1 = R 5 and R 3 = R 4 = R 6 = R 7
2R1
e o = [ 1+
] (e 2 − e1)
1/2
LM2904
Input current compensation
R2
2904-15.EPS
2904-16.EPS
As shown eo = 101 (e2 - e 1).
HIGH INPUT Z ADJUSTABLE GAIN DC
INSTRUMENTATION AMPLIFIER
LOW DRIFT PEAK DETECTOR
R1
100kΩ
e1
R2
2kΩ
1/2
LM2904
IB
R3
100kΩ
R4
100kΩ
1/2
LM2904
Gain adjust
1/2
eI
eO
1/2
LM2904
1µ F
C
ZI
R5
100kΩ
R
1MΩ
R7
100kΩ
Zo
2IB
2N929
2IB
R6
100kΩ
0.001µ F
IB
3R
3MΩ
IB
e2
eo
IB LM2904
1/2
LM2904
1/2
LM2904
Input current
compensation
8/11
2904-18.EPS
R2
As shown e o = 101 (e2 - e1)
2904-17.EPS
if R 1 = R 5 and R 3 = R 4 = R 6 = R7
2R1
eo = [ 1+
] (e2 − e1)
LM2904
ACTIVE BAND-PASS FILTER
R1
100kΩ
1/2
LM2904
R5
470kΩ
R4
10MΩ
R3
100kΩ
C2
330pF
1/2
LM2904
R6
470kΩ
Vo
1/2
LM2904
Fo = 1kHz
Q = 50
AV = 100 (40dB)
R7
100kΩ
R8
100kΩ
C3
10µ F
VCC
2904-19..EPS
+V1
R2
100kΩ
C1
330pF
9/11
LM2904
PACKAGE MECHANICAL DATA
8 PINS - PLASTIC DIP OR CERDIP
B
I
L
a1
A
e4
b1
B1
b
E
e
Z
e3
Z
D
5
1
4
A
a1
B
b
b1
D
E
e
e3
e4
F
i
L
Z
10/11
Min.
Millimeters
Typ.
3.32
0.51
1.15
0.356
0.204
Max.
1.65
0.55
0.304
10.92
9.75
7.95
Min.
0.020
0.045
0.014
0.008
Max.
0.065
0.022
0.012
0.430
0.384
0.313
2.54
7.62
7.62
3.18
Inches
Typ.
0.131
0.100
0.300
0.300
6.6
5.08
3.81
1.52
0.125
0260
0.200
0.150
0.060
DIP8.TBL
Dimensions
PM-DIP8.EPS
F
8
LM2904
PACKAGE MECHANICAL DATA
8 PINS - PLASTIC MICROPACKAGE (SO)
s
e3
b1
e
a1
b
A
a2
C
c1
a3
L
E
D
M
5
1
4
A
a1
a2
a3
b
b1
C
c1
D
E
e
e3
F
L
M
S
Min.
Millimeters
Typ.
0.1
0.65
0.35
0.19
0.25
Max.
1.75
0.25
1.65
0.85
0.48
0.25
0.5
Min.
Inches
Typ.
0.026
0.014
0.007
0.010
Max.
0.069
0.010
0.065
0.033
0.019
0.010
0.020
0.189
0.228
0.197
0.244
0.004
o
45 (typ.)
4.8
5.8
5.0
6.2
1.27
3.81
3.8
0.4
0.050
0.150
4.0
1.27
0.6
0.150
0.016
0.157
0.050
0.024
SO8.TBL
Dimensions
PM-SO8.EPS
F
8
o
8 (max.)
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics 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 licence is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON
Microelectronics. Specifications mentioned in this pub lication are subject to change without notice. This publ ication supersedes
and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical
components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics.
ORDER CODE :
 1994 SGS-THOMSON Microelectronics - All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
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11/11